BQ24179 [TI]
集成式 NVDC 5A 1 至 4 节开关模式降压/升压电池充电器;型号: | BQ24179 |
厂家: | TEXAS INSTRUMENTS |
描述: | 集成式 NVDC 5A 1 至 4 节开关模式降压/升压电池充电器 电池 开关 |
文件: | 总131页 (文件大小:2916K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
BQ24179
ZHCSN77 –MARCH 2021
带双输入选择器的BQ24179 I2C 控制、1 节至4 节、5A 降压/升压电池充电器
1 特性
3 说明
• 高功率密度、高集成降压/升压充电器,用于1-4 节
电池,支持任何USB PD 3.0 概要文件
– 集成四个开关MOSFET、BATFET
– 集成输入和充电电流检测
• 高效
BQ24179 是一个完全集成的开关模式降压/升压充电
器,用于1-4 节锂离子电池和锂聚合物电池。该集成包
括 4 开关 MOSFET(Q1、Q2、Q3、Q4)、输入和充
电电流感应电路、电池 FET (QBAT) 以及降压/升压转换
器的环路补偿。
– 750kHz 或1.5MHz 开关频率
– 为2s 电池充电进行效率优化,在3A ICHG 下,
9V 输入达到96.5% 的效率,15V 输入达到
94.5% 效率
器件信息(1)
封装尺寸(标称值)
器件型号
BQ24179
封装
DSBGA (56)
2.90mm x 3.30mm
(1) 如需了解所有可用封装,请参阅数据表末尾的可订购产品附
录。
– 5A 充电电流,精度10mA
• 效率高达96.5%:在3A 电流下从20V 输入
为16V 电池充电
• 支持宽输入源
VBUS
SW1
PMID
USB
– 3.6V 至24V 宽输入工作电压范围,绝对最大额
定电压为30V
– 最大功率跟踪,输入电压动态电源管理
(VINDPM) 高达22V,输入电流动态电源管理
(IINDPM) 高达3.3A
System Load
SYS
SW2
– 检测USB BC1.2、SDP、CDP、DCP、HVDCP
以及非标准适配器
BAT
• 用于源选择的双输入电源多路复用器控制器(可
选)
I2C Bus
• 窄电压DC (NVDC) 电源路径管理
• 灵活的自主和I2C 模式,可实现出色系统性能
• 用于电压、电流和温度监控的集成16 位ADC
• 低电池静态电流
BATP
Host
1s~4s
Battery
Host
Control
BQ24179
GND
– 仅使用电池工作时典型为30µA
• 高准确度
– 2s 电池充电电压调节范围为±1%
– 充电电流调节范围为±10%
– 输入电流调节范围为±5%
• 安全
简化版原理图
– 热调节和热关断
– 输入/电池OVP 和OCP
– 转换器MOSFET OCP
– 充电安全计时器
• 封装
– 56 引脚,2.9mm × 3.3mm WCSP
2 应用
• 智能手机、平板电脑、无线真空吸尘器、医疗设
备、无人机
• 无线扬声器、数码相机
• 移动打印机、电子销售终端(EPOS)
本文档旨在为方便起见,提供有关TI 产品中文版本的信息,以确认产品的概要。有关适用的官方英文版本的最新信息,请访问
www.ti.com,其内容始终优先。TI 不保证翻译的准确性和有效性。在实际设计之前,请务必参考最新版本的英文版本。
English Data Sheet: SLUSEH0
BQ24179
ZHCSN77 –MARCH 2021
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Table of Contents
8.5 Register Map.............................................................44
9 Application and Implementation................................ 115
9.1 Application Information............................................115
9.2 Typical Application.................................................. 116
10 Power Supply Recommendations............................122
11 Layout.........................................................................123
11.1 Layout Guidelines................................................. 123
11.2 Layout Example.................................................... 124
12 Device and Documentation Support........................125
12.1 Device Support..................................................... 125
12.2 Documentation Support........................................ 125
12.3 接收文档更新通知................................................. 125
12.4 支持资源................................................................125
12.5 Trademarks...........................................................125
12.6 静电放电警告........................................................ 125
12.7 术语表................................................................... 125
13 Mechanical, Packaging, and Orderable
1 特性................................................................................... 1
2 应用................................................................................... 1
3 说明................................................................................... 1
4 Revision History.............................................................. 2
5 说明(续).........................................................................3
6 Pin Configuration and Functions...................................4
7 Specifications.................................................................. 7
7.1 Absolute Maximum Ratings........................................ 7
7.2 ESD Ratings............................................................... 7
7.3 Recommended Operating Conditions.........................7
7.4 Thermal Information....................................................8
7.5 Electrical Characteristics.............................................8
7.6 Timing Requirements................................................15
7.7 Typical Characteristics..............................................17
8 Detailed Description......................................................19
8.1 Overview...................................................................19
8.2 Functional Block Diagram.........................................20
8.3 Feature Description...................................................21
8.4 Device Functional Modes..........................................42
Information.................................................................. 126
4 Revision History
DATE
REVISION
NOTES
March 2021
*
Initial release.
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5 说明(续)
它使用窄范围 VDC 电源路径管理,将系统电压调节至稍高于电池电压的水平,但是不会下降至低于可配置的最小
系统电压。当系统功率超过输入源额定值时,电池补充模式支持系统,不会使输入源过载。
充电器支持 NVDC 电源路径管理,将系统电压调节至稍高于电池电压的水平,但是不下降至低于最小系统电压。
即便在电池完全放电或被取出时,系统仍会继续工作。当负载功率超过输入源额定值时,电池会进入补充模式并
防止输入源过载和系统崩溃。
该器件从传统 USB 适配器到高电压 USB PD 适配器和传统桶形适配器等各种输入源为电池充电。在没有主机控
制时,充电器基于输入电压和电池电压自动将转换器设置为降压、升压或降压-升压配置。双输入源选择器管理来
自两个不同输入源的电源流入。输入选择由主机通过 I2C 来控制,默认源 1 (VAC1) 作为主输入,源 2 (VAC2) 作
为辅助输入。
为支持通过可调节高电压适配器进行快速充电,该器件提供了 D+/D- 握手机制。该器件符合 USB 2.0 和 USB 3.0
功率传输规范,具有输入电流和电压调节功能。此外,输入电流优化器 (ICO) 还能够检测未知输入源的最大功率
点。
除了 I2C 主机控制的充电模式,此充电器还支持自动充电模式。上电之后,使用默认寄存器设置启用充电。此器
件可以在无需软件参与的情况下完成充电周期。它检测电池电压并在不同阶段为电池充电:涓流充电、预充电、
恒定电流 (CC) 充电和恒定电压 (CV) 充电。在充电周期的末尾,当充电电流低于在恒定电压阶段中预设定的限值
(终止电流)时,充电器自动终止。当整个电池下降到低于再充电阈值时,充电器将自动启动另一个充电周期。
该充电器提供针对电池充电和系统运行的多种安全特性,其中包括电池负温度系数热敏电阻监视、涓流充电、预
充电和快速充电计时器以及电池和输入上的过压/过流保护。当结温超过可编程的阈值时,热调节会减小充电电
流。器件的 STAT 输出报告充电状态和任何故障状况。PG 输出指示电源是否正常。当发生故障时,INT 引脚会立
即通知主机。
该器件还提供了一个16 位模数转换器(ADC),用于监视充电电流和输入/电池/系统(VAC、VBUS、BAT、SYS、
TS)电压。
该器件采用56 引脚2.9mm × 3.3mm WCSP 封装。
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6 Pin Configuration and Functions
1
2
3
4
5
6
7
VBUS
PMID
SW1
GND
SW2
SYS
BAT
A
B
C
D
E
F
VBUS
VBUS
BTST1
REGN
STAT
VAC2
VAC1
PMID
SW1
SW1
SW1
SW1
D-
GND
SW2
SW2
SW2
SW2
PROG
INT
SYS
BAT
PMID
GND
SYS
BAT
PMID
GND
SYS
BAT
PMID
GND
SYS
BAT
D+
ILIM_HIZ
SDRV
BATN
IBAT
BTST2
BATP
TS
G
H
ACDRV2
QON
CE
ACDRV1
PG
SCL
SDA
Top View = Xray through a soldered down part with A1 starting in upper left corner
图6-1. YBG Package 56-Pin DSBGA Top View
表6-1. Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
A1
Charger Input Voltage –The power input terminal of the charger. An input current sensing circuit is
connected between VBUS and PMID. Place a 0.1-μF ceramic capacitor from VBUS to power GND as
close as possible to the charger IC. The recommended capacitor at VBUS are two piece of 10-μF and
one piece of 0.1-μF ceramic capacitors.
B1
VBUS
P
C1
A2
B2
C2
D2
E2
A3
B3
C3
D3
E3
Q1 MOSFET Drain Connection –An internal N-channel high side MOSFET (Q1) is connected
between PMID and SW1 with drain on PMID and source on SW1. Place a 0.1-μF ceramic capacitor
from PMID to power GND as close as possible to the charger IC. The recommended capacitors at
PMID are three piece of 10-μF and one piece of 0.1-μF ceramic capacitors.
PMID
SW1
P
P
Buck Side Half Bridge Switching Node
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表6-1. Pin Functions (continued)
PIN
I/O
DESCRIPTION
NAME
NO.
A4
B4
C4
D4
E4
A5
B5
C5
D5
E5
A6
B6
C6
D6
E6
A7
B7
C7
D7
E7
GND
P
Ground Return
SW2
SYS
BAT
P
P
P
Boost Side Half Bridge Switching Node
The Charger Output Voltage to System –The internal N-channel high-side MOSFET (Q4) is
connected between SYS and SW2 with drain on SYS and source on SW2. Place a 0.1-μF ceramic
capacitor from SYS to power GND as close as possible to the charger IC. The recommended
capacitors at SYS are five piece of 10-μF and one piece of 0.1-μF ceramic capacitors.
The Battery Charging Power Connection –Connect to the positive terminal of the battery pack. The
internal charging current sensing circuit is connected between SYS and BAT. The recommended
capacitors at BAT are two piece of 10-μF ceramic capacitors.
Input High Side Power MOSFET Gate Driver Power Supply –Connect a 10-V or higher rating, 47-
nF ceramic capacitor between SW1 and BTST1 as the bootstrap capacitor for driving high-side
switching MOSFET (Q1).
BTST1
REGN
BTST2
D1
E1
F7
P
P
P
The Charger Internal Linear Regulator Output –It is supplied from either VBUS or BAT dependent
on which voltage is higher. Connect a 10-V, 4.7-μF ceramic capacitor from REGN to power ground.
The REGN LDO output is used for the internal MOSFETs gate driving voltage and the voltage bias for
TS pin resistor divider.
Output High Side Power MOSFET Gate Driver Power Supply –Connect a 10-V or higher rating,
47-nF ceramic capacitor between SW2 and BTST2 as the bootstrap capacitor for driving high-side
switching MOSFET (Q4).
Input FETs Driver Pin 1 –The charge pump output to drive the port #1 input N-channel MOSFET
(ACFET1) and the reverse blocking N-channel MOSFET (RBFET1). The charger turns on the back-to-
back MOSFETs by increasing the ACDRV1 voltage 5 V above the common drain connection of the
ACFET1 and RBFET1 when the turn-on condition is met. Tie ACDRV1 to GND if no ACFET1 and
RBFET1 installed.
ACDRV1
VAC1
H2
H1
G2
P
P
P
VAC1 Input Detection –When a voltage between 3.6 V and 24 V apply on VAC1, it represents a valid
input is plugged in port 1. Connect to VBUS if the ACFET1 and RBFET1 are not installed.
Input FETs Driver Pin 2 –The charge pump output to drive the port #2 input N-channel MOSFET
(ACFET2) and the reverse blocking N-channel MOSFET (RBFET2). The charger turns on the back-to-
back MOSFETs by increasing the ACDRV2 voltage 5 V above the common drain connection of the
ACFET2 and RBFET2 when the turn-on condition is met. Tie ACDRV2 to GND if no ACFET2 and
RBFET2 installed.
ACDRV2
VAC2 Input Detection –When a voltage between 3.6 V and 24 V is applied on VAC2, it represents a
valid input being plugged in port #2. Connect to VBUS if the ACFET2 and RBFET2 are not present.
VAC2
STAT
PG
G1
F1
H3
P
Open Drain Charge Status Output –It indicates various charger operations. Connect to the pull up
rail via 10-kΩresistor. LOW indicates charging in progress. HIGH indicates charging completed or
charging disabled. When any fault condition occurs, STAT pin blinks at 1Hz. The STAT pin function can
be disabled when DIS_STAT bit is set to 1.
DO
DO
Open Drain Active Low Power Good Indicator –Connected to the pull up rail via 10-kΩresistor.
LOW indicates a good input source if the VBUS voltage is above 3.6 V and below 24 V.
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表6-1. Pin Functions (continued)
PIN
I/O
DESCRIPTION
NAME
NO.
Positive Line of the USB Data Line Pair –D+/D- based USB host/charging port detection. The
detection includes data contact detection (DCD), primary and secondary detection in BC1.2, and the
adjustable high voltage adapter.
D+
D-
F2
AIO
Negative Line of the USB Data Line Pair –D+/D- based USB host/charging port detection. The
detection includes data contact detection (DCD), primary and secondary detection in BC1.2, and the
adjustable high voltage adapter.
F3
F6
AIO
P
External N-channel Ship FET (SFET) Gate Driver Output –The driver pin of the external ship FET.
The ship FET is always turned on when the ship mode is disabled, and it keeps off when the charger is
in ship mode or shutdown mode. Connect a 0402 / 50-V / 1-nF ceramic capacitor from SDRV to GND
when the ship FET is not used.
SDRV
QON
Ship FET Enable or System Power Reset Control Input –When the device is in ship mode or in the
shutdown mode, the SDRV turns off the external ship FET to minimize the battery leakage current. A
logic low on this pin with tSM_EXIT duration turns on ship FET to force the device exit the ship mode. A
logic low on this pin with tRST duration resets system power by turning off the ship FET for tRST_SFET
(also set the charger in HIZ mode when VBUS is high) and then turning on ship FET (also disable the
charger HIZ mode) to provide full system power reset. During tRST_SFET when the ship FET is off, the
charger applies a 30-mA discharging current on SYS to discharge system voltage. The pin contains an
internal pull-up to maintain default high logic.
G3
F5
DI
DI
Charger POR Default Settings Program –At power up, the charger detects the resistance tied to
PROG pin to determine the default switching frequency and the default battery charging profile. The
surface mount resistor with ±1% or ±2% tolerance is recommended. Please refer to more details in the
section of PROG Pin Configuration.
PROG
I2C Interface Clock –Connect SCL to the logic rail through a 10-kΩresistor.
I2C Interface Data –Connect SDA to the logic rail through a 10-kΩresistor.
SCL
SDA
H4
H5
DI
DIO
Open Drain Interrupt Output. –Connect the INT pin to a logic rail via a 10-kΩresistor. The INT pin
sends an active low, 256-μs pulse to the host to report the charger device status and faults.
INT
G5
DO
AI
Input Current Limit Setting and HIZ Mode Control Pin –Program ILIM_HIZ voltage by connecting a
resistor divider from pull up rail to ILIM_HIZ pin to ground. The pin voltage is calculated as: V(ILIM_HIZ)
=
1 V + 800 mΩ× IINDPM, in which IINDPM is the target input current. The input current limit used by
ILIM_HIZ
F4
the charger is the lower setting of ILIM_HIZ pin and the IINDPM register. When the pin voltage is below
0.75 V, the buck-boost converter enters non-switching mode with REGN on. When the pin voltage is
above 1 V, the converter resumes switching.
Charging Current Sensing Output –A current source output pin with the output current value as a
ratio of charging current. The typical ratio is 25-μA output current when the charging current is 1 A.
The recommended application case is connecting this pin to GND through a 10-kΩresistor, in order to
achieve a 250 mV/A voltage to charging current gain. The maximum voltage at this pin is clamped at
3.3 V.
IBAT
H6
AO
Active Low Charge Enable Pin –Battery charging is enabled when EN_CHG bit is 1 and CE pin is
LOW. CE pin must be pulled HIGH or LOW, do not leave floating.
CE
G4
G7
G6
DI
P
Positive Input for Battery Voltage Sensing –Connect to the positive terminal of battery pack. Place
100-Ωseries resistance between this pin and the battery positive terminal.
BATP
BATN
Negative Input for Battery Voltage Sensing –Connect to the negative terminal of battery pack.
Place 100-Ωseries resistance between this pin and the battery negative terminal.
AI
Temperature Qualification Voltage Input –Connect a negative temperature coefficient thermistor.
TS
H7
AI Program temperature window with a resistor divider from REGN to TS to GND. Charge suspends when
TS pin voltage is out of range. Recommend a 103AT-2 10-kΩthermistor.
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7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
MIN
-2
MAX
30
30
30
32
23
20
29
26
30
23
UNIT
V
VAC1, VAC2
VBUS (converter not switching)
PMID (converter not switching)
ACDRV1, ACDRV2, BTST1
SYS (converter not switching)
-2
V
-0.3
V
-0.3
V
-0.3
V
Voltage range (with
respect to GND)
BATP, BAT
BTST2
SDRV
SW1
-0.3
V
-0.3
V
-0.3
V
-2 (50ns)
-2 (50ns)
V
SW2
V
PG, QON, D+, D-, CE, STAT, SCL, SDA, INT, ILIM_HIZ,
PROG, TS, REGN, IBAT, BATN
-0.3
6
V
Output Sink Current
Differential Voltage
INT, STAT
6
6
mA
V
BTST1-SW1, BTST2-SW2
PMID-VBUS
-0.3
-0.3
-0.3
-0.3
-40
6
V
SYS-BAT
16
6
V
SDRV-BAT
V
TJ
Junction temperature
Storage temperature
150
150
°C
°C
Tstg
-55
(1) Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
7.2 ESD Ratings
VALUE
UNIT
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1)
±2000
V(ESD)
Electrostatic discharge
V
Charged device model (CDM), per JEDEC specification JESD22-C101, all
pins(2)
±250
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
24
18.8
3.3
5
UNIT
V
VVBUS
VBAT
IVBUS
ISW
Input voltage
3.6
Battery voltage
V
Input current
A
Output current (SW)
Fast charging current
RMS discharge current (continuously)
Peak discharge current (up to 1 sec)
Ambient temperature
Junction temperature
A
5
A
IBAT
6
A
10
85
125
A
TA
TJ
-40
-40
°C
°C
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7.3 Recommended Operating Conditions (continued)
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
µF
CVBUS
CPMID
CSYS
CBAT
Effective VBUS capacitance
Effective PMID capacitance
Effective SYS capacitance
Effective BAT capacitance
2
4
6
3
µF
µF
µF
7.4 Thermal Information
BQ24179
THERMAL METRIC(1)
YBG (DSBGA)
UNIT
56-BALL
46.1
0.2
RθJA
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
RθJC(top)
RθJB
9.5
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
0.1
ΨJT
9.3
ΨJB
RθJC(bot)
N/A
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
7.5 Electrical Characteristics
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
QUIESCENT CURRENTS
Quiescent battery current (BATP,
BAT, SYS) when the charger is in
the battery only mode, battery FET
is enabled, ADC is disabled
VBAT = 8V, No VBUS, BATFET is
enabled, I2C enabled, ADC disabled,
system is powered by battery.
IQ_BAT_ON
30
20
µA
Quiescent battery current (BATP) VBAT = 8V, No VBUS, I2C enabled, ADC
when the charger is in ship mode. disabled, in ship mode.
IQ_BAT_OFF
µA
Shutdown battery current (BATP)
VBAT = 8V, No VBUS, I2C disabled, ADC
when charger is in shut down
disabled, in shut down mode.
mode.
ISD_BAT
0.7 µA
VBUS = 15V, VBAT = 8V, charge
disabled, converter switching, ISYS = 0A,
3
mA
OOA disabled
IQ_VBUS
Quiescent input current (VBUS)
VBUS = 15V, VBAT = 8V, charge
disabled, converter switching, ISYS = 0A,
OOA enabled
5
mA
µA
Shutdown input current (VBUS) in VBUS = 5V, HIZ mode, no battery, ADC
ISD_VBUS
354
HIZ
disabled, ACDRV disabled
VBUS / VBAT SUPPLY
VAC present rising threshold to
For both VAC1 and VAC2
For both VAC1 and VAC2
3.4
3.2
3.5
V
V
turnon the ACFET-RBFET
VVAC_PRESENT
VAC present falling threshold to
turnoff the ACFET-RBFET
3.1
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
VAC overvoltage rising threshold,
when VAC_OVP[1:0]=00
For both VAC1 and VAC2
25.2
26
26.8
26.0
V
V
VAC overvoltage falling
threshold, when
VAC_OVP[1:0]=00
For both VAC1 and VAC2
For both VAC1 and VAC2
For both VAC1 and VAC2
For both VAC1 and VAC2
For both VAC1 and VAC2
For both VAC1 and VAC2
For both VAC1 and VAC2
24.4
21.1
20.6
11.6
11.2
6.7
25.2
21.7
21.2
12
VAC overvoltage rising
threshold, when
VAC_OVP[1:0]=01
22.3
21.8
12.4
12.0
7.3
V
V
V
V
V
V
VAC overvoltage falling
threshold, when
VAC_OVP[1:0]=01
VVAC_OVP
VAC overvoltage rising
threshold, when
VAC_OVP[1:0]=10
VAC overvoltage falling
threshold, when
VAC_OVP[1:0]=10
11.6
7
VAC overvoltage rising
threshold, when
VAC_OVP[1:0]=11
VAC overvoltage falling
threshold, when
6.5
6.8
7.1
VAC_OVP[1:0]=11
VVBUS_OP
VBUS operating range
3.6
24
V
V
VBUS rising for active I2C, no
battery
VVBUS_UVLOZ
VBUS rising
VBUS falling
3.25
3.4
3.2
3.55
VBUS falling to turnoff I2C, no
battery
VVBUS_UVLO
3.05
3.35
V
VVBUS_PRESENT
VVBUS_PRESENTZ
VVBUS_OVP
VBUS to start switching
VBUS to stop switching
VBUS rising
VBUS falling
3.3
3.1
3.4
3.2
3.5
3.3
V
V
V
VBUS overvoltage rising threshold VBUS rising
25.2
25.7
26.2
VBUS overvoltage falling
VBUS falling
VVBUS_OVPZ
24.0
24.4
24.8
V
threshold
IBUS_OCP
IBUS over-current rising threshold
IBUS over-current falling threshold
7.0
6.5
8.0
7.5
9.0
8.5
A
A
IBUS_OCPZ
VBAT rising, when the charger is in ship
mode
3.25
2.50
3.05
3.40
2.60
3.20
3.55
2.71
3.31
V
V
V
BAT voltage for active I2C and
turning on BATFET, no VBUS, no
VAC
VBAT_UVLOZ
VBAT rising, when the charger is in
normal mode
VBAT falling, when the charger is in ship
mode
BAT voltage to turn off I2C and
BATFET, no VBUS, no VAC
VBAT_UVLO
VBAT falling, when the charger is in
normal mode
2.30
3.3
2.40
3.4
2.50
3.5
V
V
VPOORSRC
VPOORSRC
Bad adapter detection threshold
VBUS falling
Bad adapter detection threshold
hysteresis
VBUS rising above VPOORSRC
150
200
250 mV
mA
Bad adapter detection current
source
IPOORSRC
30
POWER-PATH MANAGEMENT
System voltage regulation range,
measured on SYS
VSYSMAX_REG_RNG
3.2
19
V
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
16.82
12.62
8.44
TYP
17.00
12.80
8.60
MAX UNIT
VBAT = 16.8V (4s default)
17.25
13.04
8.77
V
V
V
V
System voltage regulation
accuracy (when VBAT>VSYSMIN,
charging disabled, PFM disabled)
VBAT = 12.6V (3s default)
VBAT = 8.4V (2s default)
VBAT = 4.2V (1s default)
VSYSMAX_REG_ACC
4.268
4.40
4.550
VSYSMIN regulation range,
measured on SYS
VSYSMIN_REG_RNG
VSYSMIN_REG_STEP
2.5
16
V
VSYSMIN regulation step size
250
12.2
9.2
mV
V
4s battery
3s battery
2s battery
1s battery
11.9
9.0
12.5
9.4
V
System voltage regulation
accuracy (when VBAT<VSYSMIN
VSYSMIN_REG_ACC
)
7.12
3.5
7.2
7.32
3.9
V
3.7
V
As a percentage of the system regulation
voltage, to turnoff the converter.
VSYS overvoltage rising threshold
VSYS overvoltage falling threshold
105.5
95.5
2.1
110.0
100
2.2
112.3
102
2.3
%
%
V
VSYS_OVP
As a percentage of the system regulation
voltage, to re-enable the converter.
VSYS short voltage falling
threshold
VSYS_SHORT
BATTERY CHARGER
VREG_RANGE
Typical charge voltage regulation
range
3
18.8
V
VREG_STEP
Typical charge voltage step
10
mV
%
VREG = 16.8V
VREG = 12.6V
VREG = 8.4V
VREG = 4.2V
-1.0
-1.0
-1.0
-1.0
1.0
1.0
1.0
1.0
%
Charge voltage accuracy, TJ = –
40°C - 85°C
VREG_ACC
%
%
Typical charge current regulation
range
ICHG_RANGE
ICHG_STEP
0.05
5
A
Typical charge current regulation
step
10
mA
ICHG = 2A; VBAT=8V
ICHG = 1A; VBAT=8V
ICHG = 0.5A; VBAT=8V
ICHG = 4A; VBAT=8V
ICHG = 1A; VBAT=8V
ICHG = 0.5A; VBAT=8V
-10
-10
-10
-10
-10
-10
40
10
10
10
10
10
10
%
%
%
%
%
%
Typical boost mode PWM charge
current accuracy, VBUS < VBAT,
TJ = –40°C - 85°C
ICHG_ACC
Typical buck mode PWM charge
current accuracy, VBUS > VBAT,
TJ = –40°C - 85°C
ICHG_ACC
IPRECHG_RANGE
IPRECHG_STEP
Typical pre-charge current range
Typical pre-charge current step
2000 mA
mA
40
Typical LDO mode charge current IPRECHG = 480mA, VBAT = 6.5V
-10
-20
-35
-10
-20
-30
10
20
35
10
20
30
%
%
%
%
%
%
accuracy when VBATP-VBATN below
VSYSMIN, VBUS < VBAT, TJ = –
IPRECHG = 200mA, VBAT = 6.5V
IPRECHG_ACC
IPRECHG = 120mA, VBAT = 6.5V
40°C - 85°C
Typical LDO mode charge current IPRECHG = 1000mA, VBAT = 6.5V
accuracy when VBATP-VBATN below
VSYSMIN, VBUS > VBAT, TJ = –
IPRECHG = 200mA, VBAT = 6.5V
IPRECHG_ACC
IPRECHG = 120mA, VBAT = 6.5V
40°C - 85°C
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
IBAT pin current sensing accuracy IBAT = 4A, VBAT = 8V
-5
5
%
%
with 25µA/A gain. The accuracy is
IBAT = 1A, VBAT = 8V
-10
10
applied to forward charging mode
IBAT_ACC
for charging current sensing, TJ =
IBAT = 0.5A, VBAT = 8V
–40°C - 85°C
-20
40
20
%
ITERM_RANGE
ITERM_STEP
Typical termination current range
Typical termination current step
1000 mA
mA
40
ITERM = 120mA
ITERM = 480mA
-20
-14
20
14
%
%
Termination current accuracy, TJ =
–40°C - 85°C
ITERM_ACC
Battery short voltage rising
threshold to start pre-charge
VBAT_SHORTZ
VBAT rising
2.25
V
Battery short voltage falling
threshold to stop pre-charge
VBAT_SHORT
IBAT_SHORT
VBAT falling
2.06
100
15
V
mA
%
Battery trickle charging current
VBAT < VBAT_SHORTZ
VBAT_LOWV=15%VREG, VBAT_LOWV_
1:0=00
13
61.5
67.0
71.0
17
64.5
69.0
74.0
VBAT_LOWV=62.2%VREG, VBAT_LOW
V_1:0=01
63.0
68.0
72.5
1.4
%
%
Battery voltage rising threshold to
start fast-charge, as percentage of
VREG
VBAT_LOWV_RISE
VBAT_LOWV=66.7%VREG, VBAT_LOW
V_1:0=10
VBAT_LOWV=71.4%VREG, VBAT_LOW
V_1:0=11
%
Battery voltage threshold to stop
fast-charge hysteresis
VBAT falling, as percentage of
VREG, VBAT_LOWV_1:0=11
VBAT_LOWV_HYS
%
VBAT falling, VRECHG=0011,
VREG=8.4V
200
400
mV
mV
VRECHG
Battery recharge threshold
VBAT falling, VRECHG=0111,
VREG=16.8V
BATFET
MOSFET on resistance from SYS
to BAT
RBATFET
Tj = -40°C-85°C
8
9.69
mΩ
BATTERY PROTECTIONS
VBAT rising, as percentage of VREG
VBAT falling, as percentage of VREG
103
101
104
102
105
103
%
%
VBAT_OVP
Battery overvoltage threshold
VBAT falling, to clamp the charging
current as trickle charging current.
2.06
2.25
11.4
V
V
A
VBAT_SHORT
Battery short voltage
VBAT rising, to release the trickle
charging current clamp
Battery discharging over-current
rising threshold
IBAT_OCP
9.3
3.6
INPUT VOLTAGE / CURRENT REGULATION
Typical input voltage regulation
range
VINDPM_RANGE
VINDPM_STEP
22
V
Typical input voltage regulation
step
100
mV
VINDPM=18.6V
VINDPM=4.3V
-2
-3
-5
2
3
5
%
%
%
VINDPM_ACC
Input voltage regulation accuracy VINDPM=10.6V
Typical input current regulation
range
IINDPM_RANGE
0.1
3.3
A
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Typical input current regulation
step
IINDPM_STEP
10
mA
IINDPM = 500mA, VBUS=9V
IINDPM = 1000mA, VBUS=9V
IINDPM = 2000mA, VBUS=9V
IINDPM = 3000mA, VBUS=9V
415
880
460
940
500 mA
1000 mA
1960 mA
2920 mA
IINDPM_ACC
Input current regulation accuracy
1800
2720
1880
2820
Voltage range for input current
regultion at ILIM_HIZ pin
VILIM_REG_RNG
1
4
V
ILEAK_ILIM
ILIM_HIZ pin leakage current
VILIM_HIZ = 4V
-1.5
1.5 µA
D+ / D- DETECTION
VD+ _600MVSRC
ID+_10UASRC
D+ voltage source (600 mV)
D+ current source (10 µA)
D+ current sink (100 µA)
500
7
600
10
700 mV
14 µA
VD+ = 200 mV,
VD+ = 500 mV,
ID+_100UASNK
50
90
150 µA
D+ comparator threshold for
Secondary Detection
VD+_0P325
VD+_0P8
D+ pin rising, DPDM_NSCOMP2
250
775
400 mV
925 mV
D+ comparator threshold for Data
Contact Detection
D+ pin rising, DPDM_NSCOMP2
HiZ mode
850
ID+_LKG
Leakage current into D+
D- voltage source (600 mV)
D- current sink (100 µA)
-1
500
50
1
µA
VD-_600MVSRC
ID-_100UASNK
600
90
700 mV
150 µA
VD- = 500 mV,
D- comparator threshold for
Primary Detection
VD-_0P325
ID-_LKG
D- pin Rising, DPDM_NSCOMP2
HiZ mode
250
-1
400 mV
Leakage current into D-
1
µA
V
D+ comparator threshold for non-
standard adapter
VD+ _2p8
(combined VD+_2p8_hi and VD+_2p8_lo
)
2.55
2.85
D- comparator threshold for non-
standard adapter
VD- _2p8
VD+ _2p0
VD- _2p0
VD+ _1p2
VD- _1p2
(combined VD-_2p8_hi and VD-_2p8_lo)
2.55
1.85
1.85
1.05
1.05
2.85
2.15
2.15
1.35
1.35
V
V
V
V
V
D+ comparator threshold for non-
standard adapter
(combined VD+_2p0_hi and VD+_2p0_lo
(combined VD-_2p0_hi and VD-_2p0_lo
(combined VD+_1p2_hi and VD+_1p2_lo
)
D- comparator threshold for non-
standard adapter
)
D+ comparator threshold for non-
standard adapter
)
D- comparator threshold for non-
standard adapter
(combined VD-_1p2_hi and VD-_1p2_lo
)
THERMAL REGULATION AND THERMAL SHUTDOWN
TREG = 120°C
TREG = 100°C
TREG = 80°C
TREG = 60°C
120
100
80
°C
°C
°C
°C
Junction temperature regulation
accuracy
TREG
60
Temperature Increasing (TSHUT[1:0]=00)
Temperature Increasing (TSHUT[1:0]=01)
Temperature Increasing (TSHUT[1:0]=10)
Temperature Increasing (TSHUT[1:0]=11)
130
110
100
65
150
130
120
85
170 °C
150 °C
140 °C
105 °C
Thermal Shutdown Rising
Threshold
TSHUT
Thermal Shutdown Falling
TSHUT_HYS
Hysteresis
Temperature Decreasing by TSHUT_HYS
30
°C
JEITA THERMISTOR COMPARATOR (CHARGE MODE)
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
T1 comparator rising threshold,
charge suspended above this
voltage.
VT1_RISE
As Percentage to VREGN (0°C w/ 103AT)
72.4
73.3
74.2
72.5
%
%
T1 comparator falling threshold.
charge re-enabled below this
voltage.
VT1_FALL
As Percentage to VREGN (3°C w/ 103AT)
71.5
72
As Percentage to VREGN, JEITA_T2=5°C
w/ 103AT
70.6
67.9
65.0
61.9
69.3
66.6
63.7
60.6
49.2
45.6
42.0
38.5
47.9
44.3
40.7
37.2
71.1
68.4
65.5
62.4
69.8
67.1
64.2
61.1
49.7
46.1
42.5
39
71.6
68.9
66.0
62.9
70.3
67.6
64.7
61.6
50.2
46.6
43.0
39.5
48.9
45.3
41.7
38.2
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
As Percentage to VREGN, JEITA_T2=10°C
w/ 103AT
VT2_RISE
VT2_FALL
VT3_RISE
VT3_FALL
T2 comparator rising threshold.
T2 comparator falling threshold.
T3 comparator rising threshold.
T3 comparator falling threshold.
As Percentage to VREGN, JEITA_T2=15°C
w/ 103AT
As Percentage to VREGN, JEITA_T2=20°C
w/ 103AT
As Percentage to VREGN, JEITA_T2=5°C
w/ 103AT
As Percentage to VREGN, JEITA_T2=10°C
w/ 103AT
As Percentage to VREGN, JEITA_T2=15°C
w/ 103AT
As Percentage to VREGN, JEITA_T2=20°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=40°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=45°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=50°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=55°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=40°C
w/ 103AT
48.4
44.8
41.2
37.7
As Percentage to VREGN, JEITA_T3=45°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=50°C
w/ 103AT
As Percentage to VREGN, JEITA_T3=55°C
w/ 103AT
T5 comparator falling threshold,
charge suspended below this
voltage.
VT5_FALL
As Percentage to VREGN (60°C w/ 103AT)
As Percentage to VREGN (58°C w/ 103AT)
33.7
35
34.2
35.5
34.7
36
%
%
T5 comparator rising threshold.
charge is re-enabled above this
voltage.
VT5_RISE
SWITCHING CONVERTER
1.3
1.5
1.7 MHz
850 kHz
FSW
PWM switching frequency
650
750
SENSE RESISTANCE and MOSFET Rdson
VBUS to PMID input sensing
resistance
RSNS
Tj = -40°C-85°C
6
mΩ
mΩ
Buck high-side switching MOSFET
turnon resistance between PMID Tj = -40°C-85°C
and SW1
RQ1_ON
20
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
Tj = -40°C-85°C
MIN
TYP
MAX UNIT
Buck low-side switching MOSFET
turnon resistance between SW1
and PGND
RQ2_ON
RQ3_ON
RQ4_ON
30
mΩ
Boost low-side switching MOSFET
turnon resistance between SW2
and PGND
Tj = -40°C-85°C
Tj = -40°C-85°C
22
13
mΩ
mΩ
Boost high-side switching
MOSFET turnon resistance
between SW2 and SYS
REGN LDO
VREGN
VVBUS = 5V, IREGN = 20mA
VVBUS = 15V, IREGN = 20mA
VVBUS = 5V, VREGN = 4.5V
4.6
4.8
30
4.8
5
5
V
V
REGN LDO output voltage
REGN LDO current limit
5.2
IREGN
mA
I2C INTERFACE (SCL, SDA)
VIH_SDA
VIL_SDA
VOL_SDA
IBIAS_SDA
VIH_SCL
VIL_SCL
Input high threshold level, SDA
Pull up rail 1.8V
Pull up rail 1.8V
Sink current = 5mA
Pull up rail 1.8V
Pull up rail 1.8V
Pull up rail 1.8V
Sink current = 5mA
Pull up rail 1.8V
1.3
V
V
Input low threshold level
Output low threshold level
High-level leakage current
Input high threshold level, SDA
Input low threshold level
Output low threshold level
High-level leakage current
0.4
0.4
1
V
µA
V
1.3
0.4
0.4
1
V
VOL_SCL
IBIAS_SCL
LOGIC I PIN ( CE, ILIM_HIZ, QON)
VIH_CE Input high threshold level, CE
VIL_CE
V
µA
1.3
1.3
V
V
Input low threshold level, CE
High-level leakage current, CE
Input high threshold level, QON
Input low threshold level, QON
Internal QON pull up
0.4
1
IIN_BIAS_CE
VIH_QON
VIL_QON
VQON
Pull up rail 1.8V
µA
V
0.4
V
QON is pulled up internally
3.2
V
RQON
Internal QON pull up resistance
200
kΩ
Input high threshold level,
ILIM_HIZ
VIH_ILIM_HIZ
VIL_ILIM_HIZ
1
V
V
Input low threshold level, ILIM_HIZ
0.75
LOGIC O PIN ( INT, PG, STAT)
VOL_INT
Output low threshold level, INT pin Sink current = 5mA
High-level leakage current, INT pin Pull up rail 1.8V
0.4
1
V
µA
V
IOUT_BIAS_INT
VOL_PG
Output low threshold level, PG pin Sink current = 5mA
High-level leakage current, PG pin Pull up rail 1.8V
0.4
1
IOUT_BIAS_PG
µA
Output low threshold level, STAT
VOL_STAT
Sink current = 5mA
pin
0.4
1
V
High-level leakage current, STAT
IOUT_BIAS_STAT
Pull up rail 1.8V
pin
µA
ADC MEASUREMENT ACCURACY AND PERFORMANCE
ADC_SAMPLE[1:0] = 00
24
12
6
ms
ms
ms
ms
ADC_SAMPLE[1:0] = 01
ADC_SAMPLE[1:0] = 10
ADC_SAMPLE[1:0] = 11
Conversion-time, Each
Measurement
tADC_CONV
3
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7.5 Electrical Characteristics (continued)
VVBUS_UVLOZ < VVBUS < VVBUS_OVP, TJ = -40°C to +125°C, and TJ = 25°C for typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
ADC_SAMPLE[1:0] = 00
14
15
bits
ADC_SAMPLE[1:0] = 01
ADC_SAMPLE[1:0] = 10
ADC_SAMPLE[1:0] = 11
13
14
bits
ADCRES
Effective Resolution
12
13
bits
10
11
bits
ADC MEASUREMENT RANGE AND LSB
Range
LSB
0
0
5
30
A
mA
V
IBUS_ADC
VBUS_ADC
VAC_ADC
VBAT_ADC
VSYS_ADC
IBAT_ADC
TS_ADC
ADC Bus Current Reading
ADC Bus Voltage Reading
ADC VAC Voltage Reading
ADC BAT Voltage Reading
ADC SYS Voltage Reading
ADC BAT Current Reading
ADC TS Voltage Reading
ADC Die Temperature Reading
1
Range
LSB
1
mV
V
Range
LSB
0
30
1
1
mV
V
Range
LSB
0
20
mV
V
Range
LSB
0
24
1
mV
A
Range
LSB
0
8
1
mA
%
Range
LSB
0
99.9
0.098
0.5
%
Range
LSB
-40
150 °C
°C
TDIE_ADC
7.6 Timing Requirements
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX UNIT
BATTERY CHARGER
12
24
36
15
30
45
18 min
36 min
54 min
tTOP_OFF
Typical top-off timer accuracy
Charge safety timer in trickle
charge
tSAFETY_TRKCHG
tSAFETY_PRECHG
0.9
1.8
1
2
1.1 hr
2.2 hr
5.5 hr
8.8 hr
13.2 hr
26.4 hr
Charge safety timer in pre-
charge, PRECHG_TMR = 1hr
Charge safety timer accuracy,
CHG_TMR = 5hr
4.5
5
Charge safety timer accuracy,
CHG_TMR = 8hr
7.2
8
tSAFETY
Charge safety timer accuracy,
CHG_TMR = 12hr
10.8
21.6
12
24
Charge safety timer accuracy,
CHG_TMR = 24hr
THERMAL SHUTDOWN
I2C INTERFACE
fSCL
SCL clock frequency
1000 kHz
WATCHDOG TIMER
Watchdog Reset time (EN_HIZ =
1, WATCHDOG = 160s)
tLP_WDT
100
160
s
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7.6 Timing Requirements (continued)
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX UNIT
Watchdog Reset time (EN_HIZ =
0, WATCHDOG = 160s)
tWDT
136
160
s
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7.7 Typical Characteristics
CVBUS = 2*10 µF, CPMID= 3*10 µF, CSYS = 5*10 µF, CBAT = 2*10 µF, L1 = 1 µH (SPM6530T-1R0M120) and L2 =
2.2 µH (WE-LHMI-74437346022)
100
95
90
85
80
75
70
100
95
90
85
80
75
70
VBUS = 5V
VBUS = 9V
VBUS = 15V
VBUS = 20V
VBUS = 5V
VBUS = 9V
VBUS = 15V
VBUS = 20V
0
0.5
1
1.5
2
2.5
Charging Current (A)
3
3.5
4
0
0.5
1
1.5
2
2.5
Charging Current (A)
3
3.5
4
VBAT = 8 V, Fsw = 1.5 MHz with L1 = 1 µH, PFM disabled
VBAT = 12 V, Fsw = 1.5 MHz with L1 = 1 µH, PFM disabled
图7-1. 2s Battery Charge Efficiency vs. Charge
图7-2. 3s Battery Charge Efficiency vs. Charge
Current
Current
100
95
100
95
90
85
80
90
85
80
VBUS = 5V
VBUS = 9V
VBUS = 15V
VBUS = 20V
VBUS = 5V
VBUS = 9V
VBUS = 15V
75
75
70
70
0
0.5
1
1.5
2
2.5
Charging Current (A)
3
3.5 4
0
0.5
1
1.5
2
2.5
Charging Current (A)
3
3.5 4
VBAT = 16 V, Fsw = 1.5 MHz with L1 = 1 µH, PFM disabled
VBAT = 8 V, Fsw = 750 kHz with L2 = 2.2 µH, PFM disabled
图7-3. 4s Battery Charge Efficiency vs. Charge
图7-4. 2s Battery Charge Efficiency vs. Charge
Current
Current
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0
-3
3
2
-6
1
-9
0
-12
-15
-18
-1
-2
-3
VBUS = 5V
VBUS = 9V
VBUS = 15V
0
0.5
1
IINDPM Register Setting (A)
1.5
2
2.5
3
3.5
2
4
6
8
10
VINDPM Register Setting (V)
12
14
16
18
20
22
VBAT = 8 V, Fsw = 1.5 MHz with L1 = 1 µH
VBAT = 8 V, Fsw = 1.5 MHz with L1 = 1 µH
图7-5. Input Current Regulation (IINDPM) Accuracy
图7-6. Input Voltage Regulation (VINDPM)
Accuracy
0.8
PFM enabled
PFM disabled
0.6
0.4
0.2
0
2
4
6
8
10 12
VBAT (V)
14
16
18
20
VBUS = 9 V, Fsw = 1.5 MHz with L1 = 1 µH, ISYS = 0 A, Charge Disabled
图7-7. Offset Voltage of SYS Regulation Above VBAT
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8 Detailed Description
8.1 Overview
The BQ24179 is a fully integrated switch-mode buck-boost charger for 1-cell to 4-cell Li-ion battery and Li-
polymer battery. For compact design and minimum components count, the charger integrates the 4 switching
MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, the battery FET (BATFET) and all the
loop compensation of the buck-boost converter. It provides high power density and design flexibility to charge
batteries across the full input voltage range for USB Type-C™ and USB-PD applications such as digital
cameras, drones and mobile printers.
The charger supports narrow VDC (NVDC) power path management, in which the system is regulated at a
voltage slightly higher than the battery voltage, but not drop below the minimum system voltage. The system
keeps operating even when the battery is completely discharged or removed. When load power exceeds the
input source rating, the battery gets into supplement mode and prevents the input source from being overloaded
and the system from crashing.
The device charges a battery from a wide range of input sources including legacy USB adapter to high voltage
USB-PD adapter and traditional barrel adapter. The charger seamlessly transitions between buck, boost and
buck-boost modes based on input voltage and battery voltage without host control. The optional dual-input
source selector manages the power flowing from two different input sources. The host controls the input source
selection through I2C with prioritizing the first available input source.
To support fast charging using adjustable high voltage adapter (HVDCP), the device provides D+/D- handshake.
The device is compliant with USB 2.0 and USB 3.0 power delivery specification with input current and voltage
regulation. In addition, the Input Current Optimizer (ICO) allows the detection of maximum power point of an
unknown input source.
Besides the I2C host controlled charging mode, BQ24179 also supports autonomous charging mode. After
power up, the charging is defaulted enabled with all the registers default settings. The device can complete a
charging cycle without any software engagements. It detects battery voltage and charges the battery in different
phases: trickle charging, pre-charging, constant current (CC) charging and constant voltage (CV) charging. At
the end of the charging cycle, the charger automatically terminates when the charge current is below a pre-set
limit (termination current) in the constant voltage phase. When the full battery falls below the recharge threshold,
the charger will automatically start another charging cycle.
The charger provides various safety features for battery charging and system operations, including battery
temperature negative thermistor (NTC) monitoring, trickle charge, pre-charge and fast charge timers and over-
voltage/over-current protections on the battery and the charger power input pin. The thermal regulation reduces
charge current when the die temperature exceeds a programmable threshold. The STAT output of the device
reports the charging status and any fault conditions. The PG output indicates if a good power source is present.
The INT pin immediately notifies host when fault occurs.
The device also provides a 16-bit analog-to-digital converter (ADC) for monitoring charge current and input/
battery/system voltages, the TS pin voltage and the die temperature. It is available in a WCSP 2.9 mm x 3.3 mm
56-pin package.
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8.2 Functional Block Diagram
SW2
BTST2
PMID
SW1
BTST1
REGN
VBUS
VVBUS_UVLOZ
+
UVLO
SYS
PMID
Q1
+
REGN
Q4
REGN
LDO
VVBUS_OV
EN_HIZ
VBUS_OVP
VO,REF
VVBUS
SYS
VSYSMIN
+
+
+
Q2
Q3
REGN
REGN
VINDPM
+
IIN
BATSNS
VBAT_REG
+
+
IINDPM
GND
IC_TJ
TREG
ICHG
ICHG_REG
EN_CHARGE
EN_HIZ
IQ1
Q1_OCP
+
+
+
+
IQ1_OCP
GND
IQ2
Q2_OCP
Q3_OCP
IQ2_OCP
IQ3
DC-DC
CONTROL
IQ3_OCP
IQ4
Q4_OCP
CONVERTER
CONTROL
STATE
IQ4_OCP
VPOORSRC
+
+
POORSRC
TSHUT
REF DAC
VVBUS
MACHINE
ILIM_HIZ
PROG
VVBUS
IC_TJ
TSHUT
IBUS
VBUS_OVP
+
+
IBUS_OCP
+
+
+
VVBUS_OVP
IBUS_OCP
IBUS
ICHG
VBUS
VAC1
VAC2
VBAT
VSYS
VTS
BATSNS
VBAT_OVP
VBAT_OVP
VSYS
SYS_OVP
VSYS_OVP
D+
VSYS_SHORT
VSYS
SYS_SHORT
ADC
USB
DETECTION
VBTST2-VSW2
VBTST1-VSW1
Dœ
REFRESH2
REFRESH1
+
+
VBTST2_REFRESH
VBTST1_REFRESH
TDIE
VD+
VD-
TS
VTS
/PG
BATTERY
SENSING
THERMISTOR
SYS
TS_SUSPEND
RECHRG
IBAT
VREG - VRECHG
ICHG
+
+
+
+
+
BATSNS
BATFET
ICHG
ITERM
STAT
TERMINATION
SYSMIN_REG
BATUVLO
VBAT_REG
ICHG_REG
BATFET
CONTROL
CHARGE
CONTROL
STATE
VSYSMIN
BATSNS
BAT
BQ24179
Block Diagram
MACHINE
VBAT_UVLOZ
BATSNS
BATP
/INT
VBAT_SHORT
BATSNS
BAT_SHORT
BATSNS
BATSNS
AMP
SFET
CONTROL
BATN
SDRV
I2C
INTERFACE
CHARGE
PUMP
SCL
SDA
MUX
CONTROL
INPUT SELECTOR
BAT
VAC1 VAC2
ACDRV1 ACDRV2
/CE
/QON
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8.3 Feature Description
8.3.1 Device Power-On-Reset
The internal bias circuits are powered from the higher voltage, whichever VVBUS or VBAT through an integrated
power selector. The valid voltage to power up the device has to be greater than either VVBUS_UVLOZ or
VBAT_UVLOZ thresholds. When VVBUS < VVBUS_UVLOZ, VBAT < VBAT_UVLOZ and a voltage higher than VAC_PRESENT
is present at either VAC1 or VAC2, the device will be powered from VAC1 or VAC2, depending on which comes
first.
Typically 5 ms after a valid voltage is first present at either VBAT, VBUS or VAC1 / VAC2, the charger wakes up,
starts the ACFET-RBFET detection, reading the resistance at PROG pin, then configures the charger power on
reset (POR) register setting accordingly. Approximately 20 ms after input voltage presence, the I2C registers
become accessible to the host.
8.3.2 PROG Pin Configuration
At POR, the charger detect the PROG pin pull down resistance, then sets the charger default POR switching
frequency and the battery cell count. Follow the resistance list in the table below to set the desired POR
switching frequency and battery cell count. The surface mount resistor with ±1% or ±2% tolerance is
recommended.
表8-1. PROG Pin Resistance to Set Default Switching Frequency and Battery Cell Count
SWITCHING FREQUENCY
CELL COUNT
TYPICAL RESISTANCE AT PROG PIN
1.5 MHz
1s
1s
2s
2s
3s
3s
4s
4s
3.0 kΩ
4.7 kΩ
750 kHz
1.5 MHz
6.04 kΩ
8.2 kΩ
750 kHz
1.5 MHz
10.5 kΩ
13.7 kΩ
17.4 kΩ
27.0 kΩ
750 kHz
1.5 MHz
750 kHz
Some of the charging parameters default values are determined by the battery cell count identified by PROG pin
configuration, which are summarized in the table below.
表8-2. Charging Parameters Dependent on Battery Cell Count
CELL (REG0x0A[7:6])
ICHG (REG0x03/04)
VSYSMIN (REG0x00[5:0])
VREG (REG0x01/02)
VREG Range
1s
2s
3s
4s
1 A
2 A
2 A
1 A
3.5 V
7 V
9 V
12 V
4.2 V
8.4 V
12.6 V
16.8 V
14 V - 18.8 V
3 V - 4.99 V
5 V - 9.99 V
10 V - 13.99 V
After POR, the host can program the ICHG and VSYSMIN registers to any values within the ranges defined in
the register tables. However, when programming the battery charging voltage (VREG), the host must ensure the
VREG value falling into the right range associated with the CELL register (REG0x0A[7:6]) setting defined in the
table above. When the CELL register is changed, the ICHG, VSYSMIN and VREG registers are reset to the
POR default values associated with the CELL setting.
For example, if the PROG pin resistance is a 2s battery configuration, the default POR CELL, ICHG, VSYSMIN
and VREG settings will be 2s, 2 A, 7 V and 8.4 V respectively. After POR, the host can change ICHG and
VSYSMIN to any other values, and change VREG to any other values between 5 V and 9.99 V. With the CELL
bits stay at 2s battery configuration, when REG_RST bit or watchdog timer expired, the registers are reset to
default values with ICHG, VSYSMIN and VREG automatically return to 2 A, 7 V, 8.4 V respectively.
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When the CELL register is 2s battery configuration, any write out of the range of VREG (5 V - 9.99 V) is ignored
by the charger. If VREG needs to be programmed out of the 5 V - 9.9 V range, like 11 V, the CELL bits have to
be changed to 3s setting. The ICHG, VSYSMIN and VREG registers are reset to the 3s POR default values first,
which are 1 A, 9 V and 12.6 V. After that, the host can program VREG in the range of 10 V - 13.99 V. In addition,
when the CELL setting is changed to 3s, ICHG, VSYSMIN and VREG return to 1 A, 9 V and 12.6 V, when the
registers are reset to the default values by REG_RST bit or the watchdog timer expiration.
8.3.3 Dual-Input Power Mux
The BQ24179 has two ACDRV drivers to control two optional sets of back-to-back power N-FETs, selecting and
managing the power from two different input sources. In the POR sequence, the charger detects whether the
ACFETs-RBFETs are present, then updates the ACRB1_STAT or ACRB2_STAT status bits accordingly. The
ACFET1-RBFET1 or ACFET2-RBFET2 can be controlled by setting the register bit EN_ACDRV1 or
EN_ACDRV2. If the external ACFET-RBFET is not present, then tie VAC1 / VAC2 to VBUS and connect
ACDRV1 / ACDRV2 to GND. The power MUX drivers support three different application cases, which are
elaborated in detail below.
8.3.3.1 VBUS Input Only
In this scenario, only single input is connected to VBUS directly, no back-to-back power MOSFETs are required.
VAC1 and VAC2 are recommended to be shorted to VBUS. Both ACDRV1 and ACDRV2 need to be pulled down
to GND, as shown in the figure below.
ACDRV2
VAC2
VBUS
PMID
VBUS
ACDRV1
VAC1
图8-1. Single Input Connected to VBUS Directly Without ACFET-RBFET
• At POR, the charger detects no ACFETs-RBFETs are present by sensing that the ACDRV1 and ACDRV2
pins both shorted to GND.
• The charger updates the status bits ACRB1_STAT and ACRB2_STAT to 0, and locks EN_ACDRV1 = 0 and
EN_ACDRV2 = 0.
• VAC1 and VAC2 are connected to VBUS directly. The ACDRV1 and ACDRV2 pins always stay low.
8.3.3.2 One ACFET-RBFET
In this configuration, only ACFET1-RBFET1 is present, ACFET2-RBFET2 is not. VAC1 is tied to the drain of
ACFET1, ACDRV1 is connected to the gate of ACFET1. VAC2 is shorted to VBUS, ACDRV2 is pulled down to
GND. This structure is illustrated in the figure below, which is able to support either single input (one from VAC1
to VBUS through ACFET1-RBFET1, or one to VBUS directly) or dual-input (one from VAC1 to VBUS through
ACFET1-RBFET1, the other one connected to VBUS directly) applications.
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VRX
Wireless Charging
ACDRV2
VAC2
PMID
VBUS
VIN1
ACFET1
RBFET1
ACDRV1
VAC1
图8-2. One ACFET-RBFET Structure Supporting One Input at VAC1 and/or One Input at VBUS
• At POR, the charger detects only ACFET1-RBFET1 presented, updates ACRB1_STAT to 1 and keeps
ACRB2_STAT as 0.
• The charger locks the register bit EN_ACDRV2 at 0, and the ACDRV2 pin will always stay low.
• When a valid input is presented at VAC1, the charger will set EN_ACDRV1 = 1 and turn ACFET1-RBFET1
on.
• To swap from the input at VAC1 to the input at VBUS, the host has to turn off the ACFET1-RBFET1 first by
setting DIS_ACDRV = 1 (forcing EN_ACDRV1 = 0), then enable the other input source which is connected to
VBUS directly.
• In contrast, to swap from the input at VBUS to the input at VAC1, the host has to disable the input source
connected to VBUS first, then turn on the ACFET1-RBFET1 by setting DIS_ACDRV = 0.
8.3.3.3 Two ACFETs-RBFETs
In this scenario, both ACFET1-RBFET1 and ACFET2-RBFET2 are present. VAC1 / VAC2 is tied to the drain of
ACFET1 / ACFET2, ACDRV1 / ACDRV2 is connected to the gate of ACFET1 / ACFET2. This structure is
developed to support dual-input connected at VA1 and VAC2.
RBFET2
ACFET2
VIN2
VIN1
ACDRV2
VAC2
PMID
VBUS
ACFET1
RBFET1
ACDRV1
VAC1
图8-3. Two ACFETs-RBFETs Structure Supporting One Input at VAC1 and One Input at VAC2
• At POR, the charger detects both ACFET1-RBFET1 and ACFET2-RBFET2 presented, then updates
ACRB1_STAT and ACRB2_STAT to 1.
• EN_ACDRV1 and EN_ACDRV2 are programmable in this case.
• The ACDRV turns on the ACFET-RBFET of the port with a valid input presented first. The other ACFET-
RBFET stays off, even if there is an adapter being plugged in later.
• Programming EN_ACDRV1 = 1, EN_ACDRV2 = 1 at the same time to turn on both ACFET1-RBFET1 and
ACFET2-RBFET2 is not allowed, which will be ignored by the charger.
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• Assuming two valid voltages are presented at VAC1 and VAC2, ACFET1-RBFET1 turns on, connecting the
input source at VAC1 to VBUS. If the voltage at VAC1 becomes invalid because of VAC_UVLO, VAC_OV or
IBUS_OC, the charger swaps the input from VAC1 to VAC2, by turning off ACFET1-RBFET1 and then turning
on ACFET2-RBFET2, without any host engagement. Swapping the input from VAC1 to VAC2 also can be
controlled by the host. For example, to swap VAC1 to VAC2, the host can program REG0x13[7:6]
(EN_ACDRV2, EN_ACDRV1) from 01b to 10b. The same control logic is applied to the input swapping from
VAC2 to VAC1.
The waveforms below show the charger input transition from VAC1 to VAC2 when VAC1 is disconnected. At the
beginning, VAC1 = 12 V and VAC2 = 8 V are both present. When VAC1 = 12 V is gone, the charger
accomplishes the input source auto transition from VAC1 to VAC2 without host control.
Powered by VAC1
Powered by VAC2
SW1
图8-4. Input Source Auto Transition from VAC1 to VAC2 when VAC1 is Gone
When VAC2 has been connected, even if VAC1 is re-plugged in again later, the charger still stays connecting
VAC2 as the input source, which is illustrated as the waveforms below. The host has to be involved to swap the
input source from VAC2 back to VAC1 if necessary.
SW1
Powered by VAC2
图8-5. VAC1 Re-Plugged in When VAC2 Connected as the Charger Input
Some other critical notes for the application of this dual input power MUX are list below:
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• The register bits, EN_ACDRV1 and EN_ACDRV2, are not only to control the turning on / off of ACFETs-
RBFETs but also to indicate the on / off status of the FETs.
• The charger also provides the fault protection by turning ACFETs-RBFETs off, such as VAC_OVP and
IBUS_OCP.
• With only one valid input presented at either VAC1 or VAC2, the ACFET1-RBFET1 and ACFET2-RBFET2
can not be both turned off by setting REG0x13[7:6] = 00b, because the charger is always trying to connect
the only one input voltage available to power the charger. At this condition, the host has to set DIS_ACDRV =
1 to force both two ACFETs-RBFETs off. With two input sources presented at both VAC1 and VAC2, the host
can turn of the two ACFETs-RBFETs by setting either REG0x13[7:6] = 00 or DIS_ACDRV = 1.
• In the transition from one input to the other one, after one ACFET-RBFET is turned off, the other one turns on
until the VBUS voltage drops lower than VBUS_PRESENT. The converter stops switching for a short time period.
When no battery presented or battery depleted, the system output would fall. The user has to be aware of this
and avoid the input source swap when the battery voltage is too low.
8.3.4 Device Power Up from Battery without Input Source
If only the battery is present and the battery voltage is above the UVLO threshold (VBAT_UVLOZ), the BATFET
turns on and connects the battery to the system through the internal BATFET. The REGN LDO stays off to
minimize the quiescent current. The low RDS(ON) of BATFET and the low quiescent current on BAT minimize the
conduction loss and maximize the battery run time. The device always monitors discharge current through the
BATFET.
8.3.5 Device Power Up from Input Source
When an input source is present at VBUS, the device checks the input source voltage to turn on the REGN LDO
and all the bias circuits. It detects and sets the input current limit before the buck-boost converter is started. The
power up sequence from input source is as listed below:
1. Power up REGN LDO
2. Poor source qualification
3. Set the input current limit based on ILIM_HIZ pin voltage, and set the POR default VINDPM according to the
VBUS open circuit voltage.
4. Input Source Type Detection based on D+/D- to set default Input Current Limit (IINDPM) register and input
source type
5. Converter power-up
8.3.5.1 Power Up REGN LDO
When the device is powered up from VBUS, the LDO is turned on when VVBUS_PRESENT < VBUS < VVBUS_OVP
.
When the device is powered up from battery only condition, the LDO is turned on if VBAT is higher than 3.2 V,
and ADC TS channel is on (ADC_EN = 1 and TS_ADC_DIS = 0)
The REGN LDO supplies internal bias circuits and the MOSFETs gate drivers. The pull-up rails of ILIM_HIZ, TS,
and STAT can be connected to REGN. The INT pin pull-up rail is recommended to be an external 1.8 V or 3.3 V
voltage source, rather than REGN, because at battery only condition, the REGN might not be available. Except
the charger related pull up rails, the REGN is not recommended to source any other external circuit. The REGN
has to power the internal MOSFETs gate drivers, which is very critical for the charger normal operation.
8.3.5.2 Poor Source Qualification
After the REGN LDO powers up, the device checks the current capability of the input source. The input source
has to meet the following requirements in order to move forward to the next power on steps.
1. VBUS voltage below VVBUS_OVP
2. VBUS voltage above VPOORSRC when pulling IPOORSRC (typical 30 mA)
Once the conditions are met, the status register bit PG_STAT is set high and the INT pin is pulsed to signal the
host. The PG pin goes LOW.
If VBUS_OVP is detected (condition 1 above), the device automatically retries detection once the over-voltage
fault goes away. If a poor source is detected (when pulling IPOORSRC, the VBUS voltage drops below VPOORSRC),
the device repeats poor source qualification routine every 2 seconds. After 7 consecutive failures, the device
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sets EN_HIZ = 1 and goes to HIZ mode. The battery must have enough charge to power the system while the
device is in HIZ. Adapter re-plugin or EN_HIZ bit toggle is required when the input source can be used to power
the device. The EN_HIZ bit is cleared automatically when the adapter is plugged in. Whenever the VBUS voltage
does not meet either condition 1 or condition 2, it means the input source is not qualified anymore, the PG pin
goes HIGH and the PG_STAT bit goes low, at the same time, an INT pulse will be asserted and PG_FLAG will
be set to 1, if PG_MASK = 0.
8.3.5.3 Input Current Optimizer (ICO)
The device provides Input Current Optimizer (ICO) to identify maximum power point in order to avoid overloading
the input source. The algorithm automatically identifies maximum input current limit of an unknown power source
and sets the charger IINDPM register properly, in order to prevent from entering the charger input voltage
(VINDPM) regulation. This feature is disabled by default at POR (EN_ICO = 0) and only activates when EN_ICO
bit is set to 1.
After DCP type input source is detected based on the procedures describe above (Input Source Type Detection),
the algorithm runs automatically if EN_ICO bit is set. The algorithm can also be forced to execute by setting
FORCE_ICO bit regardless of input source type detected. Please note that EN_ICO = 1 is required for
FORCE_ICO to work.
The actual input current limit used by the Dynamic Power Management is reported in the ICO_ILIM register
whether set by ICO if enabled or IINDPM register if not. In addition, the current limit is clamped by ILIM pin
unless EN_EXT_ILIM bit is 0 to disable ILIM_HIZ pin function.
When the algorithm is enabled, it runs one time and then waits for the system load plus battery charge current to
pull enough input current to force the charger into VINDPM. The algorithm adjusts the actual input current limit
as shown in the ICO_ILIM until the ICO_STAT[1:0] and ICO_FLAG bits are set (the ICO_FLAG bit indicates any
change in ICO_STAT[1:0] bits). The algorithm operates depending on battery voltage:
1. When the battery voltage is below VSYSMIN, the algorithm starts ICO_ILIM register with IINDPM which is
the maximum input current limit allowed by system
2. When the battery voltage is above VSYSMIN, the algorithm starts ICO_ILIM register with 500 mA which is
the minimum input current limit to minimize adapter overload
Once the optimal input current is identified, the ICO_STAT[1:0] and ICO_FLAG bits are set. The actual input
current is reported in the ICO_ILIM register and does change unless the algorithm is triggered again by the
following events :
1. A new input source is plugged-in, or EN_HIZ bit is toggled
2. IINDPM register is changed
3. VINDPM register is changed
4. FORCE_ICO bit is set to 1
5. VBUS_OVP event
These events also reset the ICO_STAT[1:0] bits to 01
8.3.5.4 Default VINDPM Setting
In the POR sequence, right after the D+/D- detection, the charger initiates ADC reading on the VBUS pin voltage
without any load current (VBUS at no load condition, VBUS0) before the converter starts switching. The default
VINDPM threshold is set to be VBUS0 - 1.4 V (VBUS0 ≥7 V) or VBUS0 - 0.7 V (VBUS0 < 7 V).
If the converter already starts switching, the VBUS0 measurement can be performed by setting the register bit
FORCE_VINDPM_DET = 1. The force VINDPM detection only can be done when VSYS_STAT = 0 (VBAT >
VSYSMIN). To measure the VBUS0 when the converter is running, the charger suspends charging (if enabled)
and the converter stops switching. Then the ADC measures the VBUS voltage without any input load current and
update the VINDPM register bit. After the VINDPM register bit is reset, the FORCE_VINDPM_DET bit returns to
0 automatically. If VSYS_STAT = 1 (VBAT < VSYSMIN), VBUS0 measurement does not start, the
FORCE_WINDPM_DET bit resets to 0 and the VINDPM register retains its current value. The host must ensure
there is a battery presence prior to force VINDPM detection by setting FORCE_VINDPDM_DET bit to allow
system to be supported by the battery during detection.
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When the measured VBUS0 is too low, for example 3.6 V, or too high, for example 25 V, the calculated VINDPM
based on the equation list above is out of the VINDPM register range, and then the changer sets the VINDPM
register to be the minimal value (3.6 V) or maximum (22 V) value.
8.3.5.5 Device HIZ State
The charger enters HIZ mode when EN_HIZ bit is set to 1. The HIZ mode refers to a charger state, in which the
REGN LDO is off, and the converter stops switching even if the adapter is present. Similar to the battery only
condition, the charger is in a low quiescent current mode, turns off the ADC and turns on the BATFET to support
the system load.
Some of the faults like VBUS_OVP, VSYS_OVP, and VBAT_OVP, force only the converter to stop switching but
keep the REGN on. While some of the faults like VSYS_SHORT and IBUS_OCP, force the charger into HIZ
mode by setting EN_HIZ = 1. More details could be found in the fault protection section.
8.3.5.6 ILIM_HIZ Pin
At POR, before the charger converter starts switching, the charger ADC reads the ILIM_HIZ pin voltage, and
calculates the input current limit (ILIM) set by this ILIM_HIZ pin, according to the equation VILIM_HIZ = 1 V + 800
mΩ × ILIM. The ILIM_HIZ pin sets a high clamp for the IINDPM register. If the IINDPM setting from the D+/D-
detection or the POR default 3-A IINDPM setting is higher than the ILIM clamp, the IINDPM register stays at this
ILIM clamp. In addition, the host cannot program the IINDPM register to any values higher than this ILIM clamp
after POR, unless the register bit EN_EXTILIM is set to 0.
The ILIM_HIZ pin can be biased from an resistor voltage divider that can be tied to either the REGN or the other
external voltage source. When the ILIM_HIZ pin is pulled lower than 0.75 V, the charger stops switching and
REGN stays on. The charger resumes switching if the ILIM_HIZ pin voltage becomes higher than 1 V.
If the ADC reads the ILIM_HIZ pin voltage is lower than 1.08 V (1 V + 800 mΩ× 100 mA), the charger considers
the ILIM clamp to be 100 mA, which is the minimal setting of the IINDPM register.
8.3.5.7 IBAT Pin for Battery Current Sensing
BQ24179 provides a high-accuracy battery charging / discharging current sensing pin, IBAT. It outputs a 25-µA
current when the battery charging / discharging current is 1 A. The IBAT pin output is valid when either VBUS or
VBAT voltage is higher than its own ULVO voltage, and EN_IBAT register bit is set to 1. The IBAT pin only
provides the battery charging current in forward charging mode and the battery discharging current at battery
only condition. When the charger is operated in forward charging mode, the output of the IBAT pin becomes zero
when the battery is turning into the supplement mode.
8.3.5.8 Buck-Boost Converter Operation
The charger employs a synchronous buck-boost converter that allows charging the 1s to 4s battery from a
legacy 5-V USB input source, HVDCP and USB-PD power sources. The charger operates in buck, buck-boost,
or boost mode based on different input voltage and output voltage combinations. The converter can operate
uninterruptedly and continuously across the Buck, Buck-boost, and Boost operating states.
8.3.5.8.1 Pulse Frequency Modulation (PFM)
In order to improve converter light-load efficiency, the device switches to PFM control at light load condition. The
effective switching frequency decreases accordingly as load current decreases. The PFM operation can be
disabled by setting PFM_FWD_DIS = 1, the converter stays at the PWM mode switching frequency and go to
DCM operation at light load condition. The minimum effective switching frequency in PFM can be limited to 25
kHz to eliminate the audible noise concern if the out of audio (OOA) feature is enabled by setting
DIS_FWD_OOA = 0. The host can disable the OOA by setting DIS_FWD_OOA = 1, which may result in the
converter effective switching frequency dropping below 25 kHz at extremely light load.
8.3.6 Power Path Management
The device accommodates a wide range of input voltage range from 3.6 V to 24 V covering the legacy 5-V USB
input, HVDCP, USB-PD input and the wall adapter. The device provides automatic power path selection to
supply the system (SYS) from input source (VBUS), battery (BAT) or both.
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8.3.6.1 Narrow Voltage DC Architecture
The device deploys the NVDC architecture with a BATFET separating the system from the battery. Even with a
fully depleted battery, the system is regulated above the minimum system voltage. The minimum system voltage
is set by VSYSMIN bits. The default minimum system voltage at POR is determined according to different
battery cell settings.
The NVDC architecture also provides the charging termination when the battery is fully charged. By turning off
the BATFET, the adapter power is prioritized to support the system, which avoid the battery being continuously
charged and discharged by the system load even if the adapter is present. This is very important to keep the
battery in a healthy condition and extend the battery life time.
When the battery voltage is below the minimum system voltage setting, the BATFET operates in linear mode
(LDO mode), and the system is regulated at around 200 mV above the minimum system voltage setting. As the
battery voltage rises above the minimum system voltage, the BATFET is fully on and the voltage difference
between the system and battery is the Rdson of BATFET multiplied by the charging current. When battery
charging is disabled and VBAT is above the minimum system voltage setting or charging is terminated, the
system is always regulated at typically 200 mV (PFM disabled) or typical 600 mV (PFM enabled) above battery
voltage. The status register VSYS_STAT bit goes high when the system is in minimum system voltage
regulation.
9.0
8.6
Charge Enabled
8.2
7.8
Charge Disabled
7.4
7.0
Minimum System Voltage
6.6
6.2
5.4 5.8 6.2 6.6 7.0 7.4 7.8 8.2 8.6
BAT (V)
图8-6. Typical System Voltage vs Battery Voltage for a 2S Battery Configuration
8.3.6.2 Dynamic Power Management
To meet the maximum current limit in USB spec and avoid over loading the adapter, the device features Dynamic
Power Management (DPM), which continuously monitors the input current and input voltage. When the input
power at the VBUS pin is too low to support the load from SYS pin and the battery charge current from BAT pin,
the charger engages either IINDPM to limit its current or VINDPM to prevent further reduction in VBUS pin
voltage.
When the system voltage is regulated at VSYSMIN, the charger could be in trickle charge, pre-charge or fast
charge stages, the SYS voltage drops lower than VSYSMIN, the VSYSMIN loop takes over and reduces the
trickle charge, pre-charge or fast charge current, so that the SYS voltage remains at the VSYSMIN level.
If the charge current falls to zero, but the input source is still overloaded, the SYS voltage will drop. Once the
SYS voltage falls below the battery voltage, the device automatically enters Supplement Mode in which the
BATFET turns on. The battery starts discharging so that the system is supported from both the input source and
battery. In supplement mode, the battery FET is operated in ideal diode mode in which the charger regulates the
battery FET gate voltage to keep the BATFET minimum VDS to approximately 25 mV when the current is low.
This prevents SYS voltage oscillations from entering and exiting the supplement mode. As the discharge current
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increases, the charger regulates the BATFET gate to a higher voltage, in order to reduce the battery FET RDSON
until the MOSFET is in full turn-on stage. At this point onwards, the VDS of the battery FET linearly increase with
the discharge current. The BATFET turns off to exit Supplement Mode when the battery is below battery
depletion threshold.
During DPM mode, the status register bits VINDPM_STAT (VINDPM) and/or IINDPM_STAT (IINDPM) go high.
The figure below shows the DPM response with 5-V/3-A adapter, 6.4-V battery, 1.5-A charge current and 6.8-V
minimum system voltage setting.
VSYS
7.0V
6.8V
VBAT
6.4V
6.0V
VBUS
5.0V
4.0V
3A
IBUS
2A
IBAT
1A
ISYS
0A
-1A
DPM
CC
DPM
CC
Supplement
图8-7. DPM Response
8.3.7 Battery Charging Management
BQ24179 charges 1S~4S Li-Ion batteries with up to 5-A charge current for high capacity cells. The battery
charging in different stages is controlled by the integrated BATFET. The low RDS(ON) BATFET improves charging
efficiency and minimizes the voltage drop during discharging.
8.3.7.1 Autonomous Charging Cycle
When battery charging is enabled (EN_CHG bit = 1 and CE pin is LOW), the device autonomously completes a
charging cycle without host involvement. The device default charging parameters are listed in the table below.
The host can always control the charging operation and optimize the charging parameters by writing to the
corresponding registers through I2C.
表8-3. Charging Parameter Default Settings
DEFAULT MODE
BQ24179
Charging voltage
4.2 V (1S), 8.4 V (2S), 12.6 V (3S), 16.8 V (4S)
Recharging voltage threshold
Fast charge current
Pre-charge current
200 mV
2 A (1S and 2S), 1 A (3S and 4S)
120 mA
100 mA
200 mA
JEITA
Trickle charge current
Termination current
Temperature profile
Fast charge safety timer
12 hours
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表8-3. Charging Parameter Default Settings (continued)
DEFAULT MODE
BQ24179
Pre charge safety Timer
2 hours
1 hour
Trickle charge safety Timer
A new charge cycle starts when the following conditions are valid:
• Converter starts up
• Battery charging is enabled by setting register bit EN_CHG = 1 and keeping CE pin LOW
• No thermistor fault on TS pin
• No safety timer fault
The charger automatically terminates the charging cycle when the charging current is below termination
threshold, charge voltage is above recharge threshold, and the device is not in DPM mode or thermal regulation.
When a fully charged battery voltage is discharged below recharge threshold (threshold selectable via
VRECHG[1:0] bits), the device automatically starts a new charging cycle. After the charging terminates, toggling
either CE pin or EN_CHG bit initiates a new charging cycle.
The STAT output indicates the charging status of: charging (LOW), charging complete or charging disabled
(HIGH) or charging fault (Blinking). The STAT output can be disabled by setting DIS_STAT = 1. In addition, the
status register (CHG_STAT) indicates the different charging phases as:
• 000 –Not Charging
• 001 –Trickle Charge (VBAT < VBAT_SHORTZ
)
• 010 –Pre-charge (VBAT_SHORTZ < VBAT < VBAT_LOWV
• 011 –Fast Charge (CC mode)
• 100 –Taper Charge (CV mode)
• 101 –Reserved
)
• 110 –Top-off Timer Active Charging
• 111 –Charge Termination Done
When the charger transitions to any of these states, including when the charge cycle completes, an INT is
asserted to notify the host.
8.3.7.2 Battery Charging Profile
The device charges the battery in five phases: trickle charge, pre-charge, constant current, constant voltage, and
top-off trickle charging (optional). At the beginning of a charging cycle, the device checks the battery voltage and
regulates current/voltage accordingly.
表8-4. Default Charging Current Setting
VBAT
CHARGING CURRENT
REGISTER DEFAULT SETTING
CHRG_STAT
< VBAT_SHORT
IBAT_SHORT
100 mA
120 mA
001
010
VBAT_SHORTZ to VBAT_LOWV
IPRECHG
2 A (1S and 2S)
1 A (3S and 4S)
> VBAT_LOWV
ICHG
011
If the charger is in DPM regulation or thermal regulation during charging, the actual charging current is less than
the programmed value. In this case, termination is temporarily disabled and the charging safety timer is counted
at half the clock rate, as explained in Charging Safety Timer.
The BATFET LDO operation can be disabled by setting DIS_LDO = 1. At this condition, the pre-charge current
and fast charge current are both regulated by the buck-boost converter PWM current regulation loop. The SYS is
not regulated at VSYSMIN any more when the LDO mode is disabled at the low battery voltage condition. When
in trickle charge, setting DIS_LDO = 1 does not affect IBAT_SHORT or VSYSMIN operation.
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VBAT_LOWV is the battery voltage threshold for the transition from pre-charge to fast charge. It is defined as a ratio
of battery voltage regulation limit (VREG). The VBAT_SHORTZ is the battery voltage threshold for the transition
from trickle charge to pre-charge, which is fixed value 2.2 V.
Regulation Voltage
VREG[10:0]
Battery Voltage
Charge Current
ICHG[8:0]
Charge Current
VSYSMIN
VBAT_LOWV
VBAT_SHORTZ
IPRECHG[5:0]
ITERM[4:0]
Trickle Charge
001
Pre-charge
010
Fast-Charge
CC
Taper-Charge
CV
Top-off Timer
(optional)
CHG_STAT[2:0]
011
110
111
100
Safety Timer
CHG_TMR[1:0]
Pre-charge
Timer
(2hrs or 0.5hr)
Trickle charge
Timer
(1hr fixed)
图8-8. Battery Charging Profile
8.3.7.3 Charging Termination
The device terminates a charge cycle when the battery voltage is above the recharge threshold, the converter is
operated in the battery constant voltage regulation loop and the current is below the termination current. After
the charging cycle is completed, the BATFET turns off. The converter keeps running to power the system and
the BATFET can turn on again if the supplement mode is triggered.
When termination is done, the status register CHG_STAT is set to 111 and an INT pulse is asserted to the host.
Termination is temporarily disabled when the charger device is in input current (IINDPM), input voltage
(VINDPM) or thermal (TREG) regulation. Termination can be permanently disabled by writing 0 to EN_TERM bit
prior to charging termination. Writing 0 to EN_TERM when the termination already occurred or in the top-off
charging stage does not disable termination, until the next charging cycle has been restarted. If termination is
reenabled by setting EN_TERM = 1 during the current charge cycle, the change is applied immediately to the
current charging cycle.
At low termination currents (like 40 mA to 160 mA), due to the comparator offset, the actual termination current
may be up to 20%~40% higher than the termination target. In order to compensate for the comparator offset, a
programmable top-off timer (default disabled) can be activated after termination is detected. Whlie the top-off
timer is running, the device continues to charge the battery in constant voltage mode (BATFET stays on) until the
top-off time expires. The top-off timer follows safety timer constraints, such that if the safety timer is suspended,
so is the top-off timer. And if the safety timer is doubled, so is the top-off timer. CHG_STAT reports whether the
top off timer is active via the 110 code. Once the top-off timer expires, the CHG_STAT register is set to 111 and
an INT pulse is asserted to the host.
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The top-off timer gets reset (set to 0 and counting resumes when appropriate) for any of the following conditions:
1. Charge disable to enable
2. Termination status low to high
3. REG_RST register bit is set (disables top-off timer)
Once the charger detects termination, the charger reads the top-off timer (TOPOFF_TMR) settings.
Programming the top-off timer value after termination has no effect unless a recharge cycle is initiated. The top-
off timer only starts to count when the charger's termination criteria are met. If EN_TERM = 0, the charger never
terminates charging, so the top-off timer does not start counting, even if it is enabled. An INT is asserted to the
host when the top-off timer starts counting as well as when the top-off timer expires. All charge cycle related INT
pulses (including top-off timer INT pulse) can be masked by CHG_MASK bit.
8.3.7.4 Charging Safety Timer
The device has a built-in safety timer to prevent an extended charging cycle due to abnormal battery conditions.
The user can program the fast charge safety timer through I2C (CHG_TMR bits). When the fast charge safety
timer expires, the fault register CHG_TMR_STAT bit is set to 1, and an INT pulse is asserted to the host. The
trickle charge timer is fixed 1 hour. The pre-charge safety timer is adjustable 2 hours (POR default) or 0.5 hour.
The fast charging timer POR default setting is 12 hours.
The trickle charge, pre-charge and fast charge safety timers can be disabled by setting EN_TRICHG_TMR,
EN_PRECHG_TMR or EN_CHG_TMR bit to 0. Each charging safety timer can be enabled anytime regardless
of the current charging state. Each timer restarts counting when it is enabled. As soon as each charging stage is
initiated, the associated safety timer starts to count, which is illustrated in the battery charging profile chart
shown in the section Battery Charging Profile.
During input voltage, current or thermal regulation, the safety timer counts at half-clock rate as the actual charge
current is likely to be below the register setting. For example, if the charger is in input current regulation
(IINDPM_STAT = 1) throughout the whole charging cycle, and the safety timer is set to 5 hours, then the timer
will expire in 10 hours. This half-clock rate feature can be disabled by setting TMR2X_EN = 0. If the host
disables the half-clock rate while the charger is already running at half-clock rate, the charger keeps running at
the half-clock rate and the half-clock rate is not disabled until the charger exit the voltage, current or thermal
regulation.
During faults which disable charging, or supplement mode, the timer is suspended. Since the timer is not
counting in this state, the TMR2X_EN bit has no effect. Once the fault goes away, the safety timer resumes. If
the charging cycle is stopped and started, the timer resets. The pre-charge safety timer and the trickle charge
safety timer follow the same rules as the fast charge safety timer in terms of getting suspended, reset and
counting at half-rate when TMR2X_EN is set.
The fast charge timer is reset at the following events:
1. Charging cycle stop and restart (toggle CE pin, EN_CHG bit, or charged battery falls below recharge
threshold after termination)
2. BAT voltage changes from pre-charge to fast-charge or vice versa (in host-mode or default mode)
3. A change of the value of CHG_TMR[1:0] register bits
The pre-charge timer is reset at the following events:
1. Charging cycle stop and restart (toggleCE pin, EN_CHG bit, or charged battery falls below recharge
threshold)
2. BAT voltage changes from trickle charge to pre-charge or vice versa, pre-charge to fast charge or vice versa
(in host-mode or default mode)
3. A change of the value of PRECHG_TMR register bit.
The trickle charge timer is reset at the following events:
1. Charging cycle stop and restart (toggleCE pin, EN_CHG bit, or charged battery falls below recharge
threshold)
2. BAT voltage changes from trickle charge to pre-charge or vice versa (in host-mode or default mode)
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8.3.7.5 Thermistor Qualification
The charger device provides a single thermistor input for battery temperature monitoring.
8.3.7.5.1 JEITA Guideline Compliance in Charge Mode
To improve the safety of charging Li-ion batteries, the JEITA guideline was released on April 20, 2007. The
guideline emphasized the importance of avoiding a high charge current and high charge voltage at certain low
and high temperature ranges.
To initiate a charge cycle, the voltage on the TS pin must be within the VT1 to VT5 thresholds. If TS voltage
exceeds the VT1-VT5 range, the controller suspends charging and waits until the battery temperature is within
the T1 to T5 range. At cool temperature T1-T2, JEITA recommends to reduce the charge current to be lower
than half of the charge current at normal temperature T2-T3. The charger register bits JEITA_ISETC[1:0] provide
the charge current programmability at T1-T2, to be 20%, 40% or 100% of the charge current in the T2-T3
temperature range or charge suspend. At warm temperature T3-T5, JEITA recommends charge voltage less
than 4.1V / cell. The charger register bits JEITA_VSET[2:0] provide the charge voltage programmability at T3-T5,
to be with a voltage offset less than charge voltage in the T2-T3 temperature range or charge suspend.
Charging termination is still enabled (when EN_TERM = 1) at cool temperature T1-T2 and warm temperature
T3-T5. The termination current remains the same in all different temperature ranges. In normal operation, battery
charging terminates when the charge current is lower than the termination current, the battery voltage is higher
than the battery recharge voltage and the charger is in the battery voltage CV regulation loop. When the
temperature enters the T1-T2 or T3-T5 ranges, the charge current may reduce to 20% or 40% of that in the T2-
T3 range, which might be lower than the termination current setting. If at this moment, the battery voltage is
already higher than the battery recharge voltage and the charger is in the battery voltage CV regulation loop, the
charger terminates charge.
In warm T3-T5 temperature range, the battery voltage regulation value become lower than that in the T2-T3
temperature range. If the battery voltage is already very close to the T2-T3 regulation value, the JEITA warm
automatic regulation voltage reduction might cause a battery over-voltage (VBAT_OVP) fault.
In cool T1-T2 temperature range or warm T3-T5 temperature range, the charge current is different from that at
the normal T2-T3 temperature range , the safety timer must be adjusted accordingly. The safety timer is
suspended when the charge is suspended, and runs at half of the clock rate when the charge current is reduced
to 20% or 40%, but stays the same when the charge current is unchanged.
One typical JEITA charging values are shown as the figure below, in which the blue real line is the default setting
and the red dash line is the programmable options.
programmable
VREG - offset
programmable
programmable
100%
VREG
offset = 0mV, 100mV, 200mV,
300mV, 400mV, 600mV or 800mV
80%
60%
40%
20%
T1
T2
T3
T5
T1
T2
T3
T5
TS Temperature
TS Temperature
图8-9. TS Charging Values
The NTC monitoring on the battery temperature can be ignored by the charger if TS_IGNORE = 1. When the TS
pin feedback is ignored, the charger considers the TS is always good for charging. The TS_STAT including
TS_COLD_STAT, TS_COOL_STAT, TS_WARM_STAT and TS_HOT_STAT, always report 000 with TS_IGNORE
= 1.
When TS_IGNORE = 0, the charger adjusts the charging profile based on the TS pin feedback information.
When the battery temperature jumps from one temperature range to the other one, the associated TS status bits
are updated accordingly. The TS flag bits are set for the temperature range for which the TS voltage is reporting,
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and an INT pulse is asserted to alert the host if TS_MASK is low. The FLAG and INT pulse can be individually
masked by properly setting the associated mask bit, to prevent the INT pulse from alerting the host of battery
temperature range changes.
The typical TS resistor network is illustrated in the figure below.
REGN
10 kꢀ
TS
图8-10. TS Resistor Network
Assuming a 103AT NTC thermistor on the battery pack as shown above, the value of RT1 and RT2 can be
determined by:
(1)
(2)
The BQ24179 provides the comparators with fixed thresholds for VT1 and VT5, and the comparators with
programmable thresholds for VT2 and VT3. The thresholds for VT2 and VT3 are controlled by TS_COOL[1:0]
and TS_WARM[1:0]. This programmability gives more flexibility for the configuration of the JEITA profile. Select
T1 = 0°C and T5 = 60°C for Li-ion or Li-polymer battery, the RT1 and RT2 are calculated to be 5.24 KΩ and
30.31 KΩrespectively.
8.3.8 Integrated 16-Bit ADC for Monitoring
The integrated 16-bit ADC in the device allows the user to get critical system information for optimizing the
behavior of the charger. The ADC control is through the ADC Control register. The ADC_EN bit provides the
ability to enable and disable the ADC in order to conserve power dissipation. The ADC_RATE bit allows
continuous conversion or one-shot behavior. After a 1-shot conversion finishes, the ADC_EN bit is cleared, and
must be re-asserted to start a new conversion. The ADC_AVG bit enables or disables (default) averaging.
ADC_AVG_INIT starts average using the existing (default) or using a new ADC value.
To enable the ADC, the ADC_EN bit must be set to 1. The ADC is allowed to operate if either the VAC > 3.4 V or
VBUS > 3.4 V or VBAT > 2.9 V is valid. If ADC_EN is set to 1 before VAC1/VAC2, VBUS or VBAT reaches its
valid threshold, then the ADC conversion is postponed until one of the power supplies reaches the threshold. If
the charger is in HIZ mode, the ADC still can be enabled by setting ADC_EN = 1. At battery only condition, if the
TS_ADC channel is enable, the ADC only works when battery voltage is higher than 3.2 V, otherwise, the ADC
works when the battery voltage is higher than 2.9 V.
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The ADC_SAMPLE bits control the ADC sample speed, with conversion times of tADC_CONV. If the host changes
the sample speed in the middle of an ADC conversion, the ADC conversion stops the channel being converted,
and that channel is reconverted at the new rate. At that point, some of the ADC register values might have been
converted with one sample rate and others with a different sample rate.
By default, all ADC channels are enabled with 1-shot or continuous conversion mode unless the channel is
disabled in the ADC_Function_Disable_0 or ADC_Function_Disable_1 register. If an ADC channel is disabled by
setting the corresponding register bit, then the value in that register is from the last valid ADC conversion or the
default POR value (all zeros if no conversions have been taken place). If an ADC channel is disabled in the
middle of an ADC measurement cycle, the device finishes the conversion of that channel, but not convert the
channel at the next conversion cycle. Even though no conversion takes place when all ADC channels are
disabled, the ADC circuitry is active and ready to begin conversion as soon as one of the bits in the
ADC_Function_Disable_0 or ADC_Function_Disable_1 register is set to 0.
The ADC_DONE_STAT and ADC_DONE_FLAG bits are set when a conversion is complete in 1-shot mode only.
This event produces an INT pulse, which can be masked with ADC_DONE_MASK. During continuous
conversion mode, the ADC_DONE_STAT and ADC_DONE_FLAG bits have no meaning and remain 0.
ADC conversion operates independently of the faults present in the device. ADC conversion continues even
after a fault has occurred (such as one that causes the power stage to be disabled) and the host must set
ADC_EN = 0 to disable the ADC. ADC conversion is interrupted upon adapter plug-in and resumes after Input
Source Type Detection default VINDPM setting are complete. ADC readings are only valid for DC states and not
for transients.
Enabling ADC does not require to bring up REGN, however, when the ADC TS channel is enabled, the charger
will turn on the REGN to bias the TS pin. For the ICHG channel, the ADC is able to read the battery pre-charge
and fast charge current in forward charging mode when the adapter is present. It also can read the battery
discharging current in battery only mode. When the charger is in trickle charge, supplement mode or charge
disabled, the ICHG ADC reading is zero. In battery only mode, the battery current sensing amplifier (CSA)
default turns off to minimize the quiescent current. Setting EN_IBAT = 1 is necessary to enable the CSA so that
the ADC can read back the battery current information.
If the host wants to exit the ADC more gracefully, it is possible to do either of the following:
1. Write ADC_RATE to one-shot in order to force the ADC to stop at the end of a complete cycle of conversions
2. Disable all ADC conversion channels so that the ADC stops at the end of the current measurement.
8.3.9 Status Outputs ( PG , STAT, and INT)
8.3.9.1 Power Good Indicator ( PG)
The PG pin goes low and the power good status register is set to 1 once a good input source is qualified. The
PG_STAT and PG_FLAG change to 1 to indicate a good input source. An INT is asserted low to alert the host
unless masked by PG_MASK when the following conditions are met:
1. VBUS above VVBUS_UVLOZ
2. VBUS below VVBUS_OVP threshold
3. VBUS above VPOORSRC (typical 3.4 V) when IPOORSRC (typical 30 mA) current is applied (not a poor source)
8.3.9.2 Charging Status Indicator (STAT Pin)
The device indicates charging state on the open drain STAT pin. The STAT pin can drive LED. The STAT pin
function can be disabled via the DIS_STAT bit.
表8-5. STAT Pin State
CHARGING STATE
STAT INDICATOR
Charging in progress (including recharge and charging in top-off
timer)
LOW
Charging complete
HIZ mode, charge disable
Battery only mode
HIGH
HIGH
HIGH
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表8-5. STAT Pin State (continued)
CHARGING STATE
STAT INDICATOR
Charge suspend (A fault condition which disable charging)
Blinking at 1 Hz
8.3.9.3 Interrupt to Host ( INT)
In some applications, the host does not always monitor charger operation. The INT pin notifies the system host
on the device operation. By default, the following events generate an active-low, 256-µs INT pulse.
1. Good input source detected
• VVBUS < VVBUS_OVP threshold
• VVBUS > VPOORSRC (typical 3.4 V) when IPOORSRC (typical 30 mA) current is applied (not a poor source)
2. VBUS_STAT changes state (VBUS_STAT any bit change)
3. Good input source removed
4. Entering IINDPM regulation
5. Entering VINDPM regulation
6. Entering IC junction temperature regulation (TREG)
7. I2C Watchdog timer expired
• At initial power up, this INT gets asserted to signal I2C is ready for communication
8. Charger status changes state (CHRG_STAT value change), including Charge Complete
9. TS_STAT changes state (TS_STAT any bit change)
10. VBUS over-voltage detected (VBUS_OVP)
11. VAC over-voltage detected (VAC_OVP for VAC1 or VAC2)
12. Junction temperature shutdown (TSHUT)
13. Battery over-voltage detected (BATOVP)
14. System over-voltage detected (VSYS_OVP)
15. IBUS over-current detected (IBUS_OCP)
16. IBAT over-current detected (IBAT_OCP)
17. Charge safety timer expired, including trickle charge and pre-charge and fast charge safety timer expired
18. A rising edge on any of the other *_STAT bits
Each one of these INT sources can be masked off to prevent INT pulses from being sent out when they occur.
Three bits exist for each one of these events:
• The STAT bit holds the current status of each INT source
• The FLAG bit holds information on which source produced an INT, regardless of the current status
• The MASK bit is used to prevent the device from sending out INT for each particular event
When one of the above conditions occurs (a rising edge on any of the *_STAT bits), the device sends out an INT
pulse and keeps track of which source generated the INT via the FLAG registers. The FLAG register bits are
automatically reset to zero after the host reads them, and a new edge on STAT bit is required to re-assert the
FLAG.
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IINDPM_STAT
IINDPM_FLAG
TREG_STAT
TREG_FLAG
INT
I2C Flag Read
图8-11. INT Generation Behavior Example
8.3.10 Ship FET Control
The charger provides an N-FET driving pin (SDRV) to control an external ship FET. When this ship FET is off, it
removes leakage current from the battery to the system. The ship FET is controlled by the SDRV_CTRL[1:0]
register bits, to support the shutdown mode, ship mode and the system power reset.
• IDLE Mode when SDRV_CTRL[1:0] = 00, POR default. The external ship FET is fully on, I2C is enabled. The
internal BATFET status is determined by the charging status. This mode could be for adapter present forward
mode or battery only condition.
• Shutdown Mode when SDRV_CTRL[1:0] = 01. The ship FET and the internal BATFET are both off. The I2C
is disabled. The charger is totally shutdown and can only be woken up by an adapter plug-in. This mode is
only for the battery only condition.
• Ship Mode when SDRV_CTRL[1:0] = 10. The ship FET and the internal BATFET are both off. The I2C is still
enabled. The charger can be woken up by setting SDRV_CTRL[1:0] back to 00, or pulling the QON pin low,
or an adapter plug-in. This mode is only for the battery only condition.
• System Power Reset when SDRV_CTRL[1:0] = 11. The ship FET is turned off for typical 350 ms to reset the
system power (converter goes to HIZ mode if VBUS is high), then the ship FET is fully turned on again. The
BATFET keeps the status unchanged during the system power reset. After the reset is done,
SDRV_CTRL[1:0] goes back to 00.
When the host changes SDRV_CTRL[1:0] from 00 to the other values, the charger turns off the ship FET
immediately or delays by tSM_DLY as configured by SDRV_DLY bit. The application diagram when the battery is
connected to the charger through an external ship FET is illustrated in the figure below.
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Q4
SYS
SYSTEM LOAD
SW2
Q3
BTST2
STAT
BATFET
REGN
BAT
Ship FET
SDRV
CE
100Ω
BQ24179
PG
BATP
TS
REGN
SDA
SCL
INT
Host
QON
IBAT
BATN
100Ω
图8-12. The Application Diagram for the External Ship FET
8.3.10.1 Shutdown Mode
To further reduce battery leakage current, the host can shut down the charger by setting the register bits
SDRV_CTRL[1:0] to 01. In this mode, the I2C is disabled and the charger is totally shut down. The device can
only be woken up by plugging in an adapter.
After the SDRV_CTRL[1:0] is set to 01, the external ship FET turns off either immediately or after waiting for 10s
as configured by SDRV_DLY register bit. When VBUS is high because of an adapter being present
SDRV_CTRL[1:0] will be reset to 00 if the host writes it to 01.
When the device exits shutdown mode, the SDRV_CTRL bits are reset to the POR default values (00).
8.3.10.2 Ship Mode
To extend battery life and minimize the system power loss when system is powered off during idle, shipping or
storage, the device can turn off BATFET and external ship FET to minimize the battery leakage current. The ship
mode is enabled when the host sets SDRV_CTRL[1:0] to 10. The I2C is still enabled, but the charger system
clock slows down to minimize the device quiescent current.
After the SDRV_CTRL[1:0] is set to 10, the external ship FET is turned off either immediately or after waiting 10
seconds as configured by SDRV_DLY register bit. When VBUS is high because of an adapter being present
SDRV_CTRL[1:0] automatically resets to 00 if the host writes it to 10.
The ship mode is disabled by one of the following events. The charger turns on ship FET and internal BATFET to
reconnect the battery to the system, SDRV_CTRL bits are reset to the POR default values (00).
• Plug in an adapter
• Set SDRV_CTRL[1:0] = 00
• Set REG_RST = 1, to reset all the registers including SDRV_CTRL bits back to default (00)
• A logic low of tSM_EXIT (typical 1s or 15ms programmed by WKUP_DLY bit) duration on QON pin
8.3.10.3 System Power Reset
The host can reset the system power by:
• Set the register bits SDRV_CTRL[1:0] to 11
• A logic low of tRST (typical 10s) duration on QON pin
When the system power reset is enabled, the device turns off the ship FET and also sets the charger in HIZ
mode if VBUS is high for tRST_SFET (typical 350ms), then turns on the ship FET and also disable the charger HIZ
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mode to provide full system power reset. When the SFET is off for tRST_SFET, the charger applies a typical 30-mA
sink current on SYS to discharge system voltage down.
No matter the charger is at battery only condition or in the forward charging mode with adapter present, the
charger resets the system power when the SDRV_CTRL[1:0] bits are set to 11 or the QON pin is pulled low for
tRST duration.
8.3.11 Protections
8.3.11.1 Voltage and Current Monitoring
The device closely monitors the input, system and battery voltage and current, as well as internal FET currents
for safe converter operation. The charger provides the faults protection list below:
• VAC Over-voltage Protection (VAC_OVP)
• VBUS Over-voltage Protection (VBUS_OVP)
• VBUS Under-voltage Protection (POORSRC)
• System Over-voltage Protection (VSYS_OVP)
• System Short Protection (VSYS_SHORT)
• Battery Over-voltage Protection (VBAT_OVP)
• Battery Over-current Protection (IBAT_OCP)
• Input Over-current Protection (IBUS_OCP)
8.3.11.2 Thermal Regulation and Thermal Shutdown
The device monitors its internal junction temperature (TJ) to avoid overheating and to limit the IC surface
temperature. When the internal junction temperature exceeds the preset thermal regulation limit (TREG bits), the
device reduces the charge current to maintain the junction temperature at the thermal regulation limit. A wide
thermal regulation range from 60°C to 120°C allows optimization of the system thermal performance. During
thermal regulation, the actual charging current is usually below the programmed value in the ICHG registers.
Therefore, termination is disabled, the fast charging safety timer runs at half the clock rate, the status register
TREG_STAT bit goes high, TREG_FLAG bit is set to 1, and an INT is asserted to alert host unless TREG_MASK
is set to 1.
Additionally, the device has thermal shutdown to turn off the converter when the IC junction temperature exceeds
the TSHUT threshold. The fault register bits TSHUT_STAT and TSHUT_FLAG are set and an INT pulse is
asserted to the host, unless TSHUT_MASK is set to 1. The BATFET and the converter resumes normal
operation when the IC die temperature decreases lower than TSHUT threshold by TSHUT_HYS
.
8.3.12 Serial Interface
The device uses I2C compatible interface for flexible charging parameter programming and instantaneous device
status reporting. I2C is a bi-directional 2-wire serial interface. Only two open-drain bus lines are required: a serial
data line (SDA), and a serial clock line (SCL). Devices can be considered as masters or slaves when performing
data transfers. A master is a device which initiates a data transfer on the bus and generates the clock signals to
permit that transfer. At that time, any device addressed is considered a slave.
The device operates as a slave device with address 0x6B, receiving control inputs from the master device like
micro-controller or digital signal processor through REG00 – REG25. Register read beyond REG25 (0x25),
returns 0xFF. The I2C interface supports both standard mode (up to 100 kbits/s), and fast mode (up to 400
kbits/s). When the bus is free, both lines are HIGH. The SDA and SCL pins are open drain and must be
connected to the positive supply voltage via a current source or pull-up resistor.
8.3.12.1 Data Validity
The data on the SDA line must be stable during the HIGH period of the clock. The HIGH or LOW state of the
data line can only change when the clock signal on SCL line is LOW. One clock pulse is generated for each data
bit transferred.
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SDA
SCL
Data line stable;
Data valid
Change of
data allowed
图8-13. Bit Transfers on the I2C Bus
8.3.12.2 START and STOP Conditions
All transactions begin with a START (S) and are terminated with a STOP (P). A HIGH to LOW transition on the
SDA line while SCL is HIGH defines a START condition. A LOW to HIGH transition on the SDA line when the
SCL is HIGH defines a STOP condition.
START and STOP conditions are always generated by the master. The bus is considered busy after the START
condition, and free after the STOP condition.
SDA
SCL
SDA
SCL
STOP (P)
图8-14. START and STOP Conditions on the I2C Bus
START (S)
8.3.12.3 Byte Format
Every byte on the SDA line must be 8 bits long. The number of bytes to be transmitted per transfer is
unrestricted. Each byte has to be followed by an ACKNOWLEDGE (ACK) bit. Data is transferred with the Most
Significant Bit (MSB) first. If a slave cannot receive or transmit another complete byte of data until it has
performed some other function, it can hold the SCL line low to force the master into a wait state (clock
stretching). Data transfer then continues when the slave is ready for another byte of data and releases the SCL
line.
Acknowledgeme
nt signal from
Acknowledgement
signal from slave
receiver
MSB
SDA
1
2
7
8
9
1
2
8
9
SCL S or Sr
START or
P or Sr
ACK
ACK
STOP or
Repeate
d START
Repeated
START
图8-15. Data Transfer on the I2C Bus
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8.3.12.4 Acknowledge (ACK) and Not Acknowledge (NACK)
The ACK signaling takes place after byte. The ACK bit allows the receiver to signal the transmitter that the byte
was successfully received and another byte may be sent. All clock pulses, including the acknowledge 9th clock
pulse, are generated by the master.
The transmitter releases the SDA line during the acknowledge clock pulse so the receiver can pull the SDA line
LOW and it remains stable LOW during the HIGH period of this 9th clock pulse.
A NACK is signaled when the SDA line remains HIGH during the 9th clock pulse. The master can then generate
either a STOP to abort the transfer or a repeated START to start a new transfer.
8.3.12.5 Slave Address and Data Direction Bit
After the START signal, a slave address is sent. This address is 7 bits long, followed by the 8 bit as a data
direction bit (bit R/ W). A zero indicates a transmission (WRITE) and a one indicates a request for data (READ).
The device 7-bit address is defined as 1101 011' (0x6B) by default. The address bit arrangement is shown below.
Slave Address
1
1
0
1
0
1
1
R/W
图8-16. 7-Bit Addressing (0x6B)
SDA
SCL
S
8
9
8
9
8
9
P
1-7
1-7
1-7
DATA
START
ADDRESS
R/W ACK
DATA
ACK
ACK
STOP
图8-17. Complete Data Transfer on the I2C Bus
8.3.12.6 Single Write and Read
图8-18. Single Write
图8-19. Single Read
If the register address is not defined, the charger IC sends back NACK and returns to the idle state.
8.3.12.7 Multi-Write and Multi-Read
The charger device supports multi-read and multi-write of all registers.
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图8-20. Multi-Write
图8-21. Multi-Read
8.4 Device Functional Modes
8.4.1 Host Mode and Default Mode
The device is a host controlled charger, but it can operate in default mode without host management. In default
mode, the device can be used as an autonomous charger with no host or while host is in sleep mode. When the
charger is in default mode, WD_STAT bit becomes HIGH, WD_FLAG is set to 1, and an INT is asserted low to
alert the host (unless masked by WD_MASK). The WD_FLAG bit would read as 1 upon the first read and then 0
upon subsequent reads. When the charger is in host mode, WD_STAT bit is LOW.
After power-on-reset, the device starts in default mode with watchdog timer expired, or default mode. All the
registers are in the default settings.
In default mode, the device keeps charging the battery with default 1-hour trickle charging safety timer, 2-hour
pre-charging safety timer and the 12-hour fast charging safety timer. At the end of the 1-hour or 2-hour or 12-
hour timer expired, the charging is stopped and the buck-boost converter continues to operate to supply system
load.
A write to any I2C register transitions the charger from default mode to host mode, and initiates the watchdog
timer. All the device parameters can be programmed by the host. To keep the device in host mode, the host has
to reset the watchdog timer by writing 1 to WD_RST bit before the watchdog timer expires (WD_STAT bit is set),
or disable watchdog timer by setting WATCHDOG bits = 00.
When the watchdog timer is expired, the device returns to default mode and all registers are reset to default
values except the ones described as detailed in the Register Map section. The Watchdog timer will be reset on
any write if the watchdog timer has expired. When watchdog timer expires, WD_STAT and WD_FLAG is set to 1,
and an INT is asserted low to alert the host (unless masked by WD_MASK).
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Reset
Selective
Registers
Default Mode
WD_STAT=1
POR
I2C Write
Reset
Watchdog
Timer
Yes
Host Mode
WD_STAT=0
I2C Write to
WD_RST
No
Watchdog Timer Expired?
Yes
No
图8-22. Watchdog Timer Flow Chart
8.4.2 Register Bit Reset
Beside the register reset by the watchdog timer in the default mode, the register and the timer could be reset to
the default value by writing the REG_RST bit to 1. The register bits, which can be reset by the REG_RST bit, are
noted in the Register Map section. After the register reset, the REG_RST bit will go back from 1 to 0
automatically.
The register reset by the REG_RST bit will not initiate the ACFET-RBFET detection, which is only done at the
charger first time POR. It will not repeat the open-circuit adapter measurements for the default VINDPM setting,
which in only done when an adapter is plugged in. In addition, if the charger is in the process of forced ICO, the
forced D+/D- detection or the forced open-circuit adapter measurements, set the REG_RST to 1 will terminate all
of these processes, because reset the register to default values will set FORCE_ICO, FORCE_INDET and
FORCE_VINDPM_DET bits to 0.
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8.5 Register Map
8.5.1 I2C Registers
表 8-6 lists the I2C registers. All register offset addresses not listed in 表 8-6 should be considered as reserved
locations and the register contents should not be modified.
表8-6. I2C Registers
Offset
0h
Acronym
Register Name
Section
REG00_Minimal_System_Voltage Minimal System Voltage
节8.5.1.2
节8.5.1.3
节8.5.1.4
节8.5.1.5
节8.5.1.6
节8.5.1.7
节8.5.1.8
节8.5.1.9
节8.5.1.10
节8.5.1.11
节8.5.1.12
节8.5.1.13
节8.5.1.14
节8.5.1.15
节8.5.1.16
节8.5.1.17
节8.5.1.18
节8.5.1.19
节8.5.1.20
节8.5.1.21
节8.5.1.22
节8.5.1.23
节8.5.1.24
节8.5.1.25
节8.5.1.26
节8.5.1.27
节8.5.1.28
节8.5.1.29
节8.5.1.30
节8.5.1.31
节8.5.1.32
节8.5.1.33
节8.5.1.34
节8.5.1.35
节8.5.1.36
节8.5.1.37
节8.5.1.38
节8.5.1.39
1h
REG01_Charge_Voltage_Limit
REG03_Charge_Current_Limit
REG05_Input_Voltage_Limit
REG06_Input_Current_Limit
REG08_Precharge_Control
REG09_Termination_Control
REG0A_Re-charge_Control
REG0B_Reserved
Charge Voltage Limit
Charge Current Limit
Input Voltage Limit
Input Current Limit
Precharge Control
Termination Control
Re-charge Control
Reserved
3h
5h
6h
8h
9h
Ah
Bh
Dh
REG0D_Pre-charge_Timer
REG0E_Timer_Control
Pre-charge Timer
Timer Control
Eh
Fh
REG0F_Charger_Control_0
REG10_Charger_Control_1
REG11_Charger_Control_2
REG12_Charger_Control_3
REG13_Charger_Control_4
REG14_Charger_Control_5
REG15_Reserved
Charger Control 0
Charger Control 1
Charger Control 2
Charger Control 3
Charger Control 4
Charger Control 5
Reserved
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Bh
1Ch
1Dh
1Eh
1Fh
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
REG16_Temperature_Control
REG17_NTC_Control_0
REG18_NTC_Control_1
REG19_ICO_Current_Limit
REG1B_Charger_Status_0
REG1C_Charger_Status_1
REG1D_Charger_Status_2
REG1E_Charger_Status_3
REG1F_Charger_Status_4
REG20_FAULT_Status_0
REG21_FAULT_Status_1
REG22_Charger_Flag_0
REG23_Charger_Flag_1
REG24_Charger_Flag_2
REG25_Charger_Flag_3
REG26_FAULT_Flag_0
Temperature Control
NTC Control 0
NTC Control 1
ICO Current Limit
Charger Status 0
Charger Status 1
Charger Status 2
Charger Status 3
Charger Status 4
FAULT Status 0
FAULT Status 1
Charger Flag 0
Charger Flag 1
Charger Flag 2
Charger Flag 3
FAULT Flag 0
REG27_FAULT_Flag_1
FAULT Flag 1
REG28_Charger_Mask_0
REG29_Charger_Mask_1
REG2A_Charger_Mask_2
Charger Mask 0
Charger Mask 1
Charger Mask 2
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表8-6. I2C Registers (continued)
Register Name
Offset
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
33h
35h
37h
39h
3Bh
3Dh
3Fh
41h
43h
45h
47h
48h
Acronym
Section
REG2B_Charger_Mask_3
REG2C_FAULT_Mask_0
REG2D_FAULT_Mask_1
REG2E_ADC_Control
Charger Mask 3
节8.5.1.40
节8.5.1.41
节8.5.1.42
节8.5.1.43
节8.5.1.44
节8.5.1.45
节8.5.1.46
节8.5.1.47
节8.5.1.48
节8.5.1.49
节8.5.1.50
节8.5.1.51
节8.5.1.52
节8.5.1.53
节8.5.1.54
节8.5.1.55
节8.5.1.56
节8.5.1.57
节8.5.1.58
FAULT Mask 0
FAULT Mask 1
ADC Control
REG2F_ADC_Function_Disable_0 ADC Function Disable 0
REG30_ADC_Function_Disable_1 ADC Function Disable 1
REG31_IBUS_ADC
REG33_IBAT_ADC
REG35_VBUS_ADC
REG37_VAC1_ADC
REG39_VAC2_ADC
REG3B_VBAT_ADC
REG3D_VSYS_ADC
REG3F_TS_ADC
IBUS ADC
IBAT ADC
VBUS ADC
VAC1 ADC
VAC2 ADC
VBAT ADC
VSYS ADC
TS ADC
REG41_TDIE_ADC
REG43_D+_ADC
TDIE_ADC
D+ ADC
REG45_D-_ADC
D- ADC
REG47_DPDM_Driver
REG48_Part_Information
DPDM Driver
Part Information
Complex bit access types are encoded to fit into small table cells. 表 8-7 shows the codes that are used for
access types in this section.
表8-7. I2C Access Type Codes
Access Type
Read Type
R
Code
Description
R
Read
Write Type
W
W
Write
Reset or Default Value
-n
Value after reset or the default
value
Register Array Variables
i,j,k,l,m,n
When these variables are used in
a register name, an offset, or an
address, they refer to the value of
a register array where the register
is part of a group of repeating
registers. The register groups
form a hierarchical structure and
the array is represented with a
formula.
y
When this variable is used in a
register name, an offset, or an
address it refers to the value of a
register array.
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8.5.1.1 REG00_Minimal_System_Voltage Register (Offset = 0h) [reset = X]
REG00_Minimal_System_Voltage is shown in 图8-23 and described in 表8-8.
Return to the 表8-6.
Minimal System Voltage
图8-23. REG00_Minimal_System_Voltage Register
7
6
5
4
3
2
1
0
RESERVED
R/W-0h
VSYSMIN_5:0
R/W-X
表8-8. REG00_Minimal_System_Voltage Register Field Descriptions
Bit
7-6
5-0
Field
Type
R/W
R/W
Reset
Notes
Description
RESERVED
VSYSMIN_5:0
0h
RESERVED
X
Reset by:
Minimal System Voltage:
REG_RST
During POR, the device reads the resistance tie to
PROG pin, to identify the default battery cell count and
determine the default power on VSYSMIN list below:
1s: 3.5 V
2s: 7 V
3s: 9 V
4s: 12 V
Type : RW
Range : 2500 mV-16000 mV
Fixed Offset : 2500 mV
Bit Step Size : 250 mV
Clamped High
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8.5.1.2 REG01_Charge_Voltage_Limit Register (Offset = 1h) [reset = X]
REG01_Charge_Voltage_Limit is shown in 图8-24 and described in 表8-9.
Return to the 表8-6.
Charge Voltage Limit
图8-24. REG01_Charge_Voltage_Limit Register
15
7
14
6
13
12
11
10
9
8
RESERVED
R-0h
VREG_10:0
R/W-X
5
4
3
2
1
0
VREG_10:0
R/W-X
表8-9. REG01_Charge_Voltage_Limit Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
15-11
10-0
RESERVED
VREG_10:0
R
0h
RESERVED
R/W
X
Reset by:
Battery Voltage Limit:
REG_RST
During POR, the device reads the resistance tie to
PROG pin, to identify the default battery cell count and
determine the default power-on battery voltage
regulation limit:
1s: 4.2 V
2s: 8.4 V
3s: 12.6 V
4s: 16.8 V
Type : RW
Range : 3000 mV-18800 mV
Fixed Offset : 0 mV
Bit Step Size : 10 mV
Clamped Low
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8.5.1.3 REG03_Charge_Current_Limit Register (Offset = 3h) [reset = X]
REG03_Charge_Current_Limit is shown in 图8-25 and described in 表8-10.
Return to the 表8-6.
Charge Current Limit
图8-25. REG03_Charge_Current_Limit Register
15
7
14
6
13
12
11
10
9
1
8
RESERVED
R-0h
ICHG_8:0
R/W-X
5
4
3
2
0
ICHG_8:0
R/W-X
表8-10. REG03_Charge_Current_Limit Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
15-9
8-0
RESERVED
ICHG_8:0
R
0h
RESERVED
R/W
X
Reset by:
Charge Current Limit
WATCHDOG
REG_RST
During POR, the device reads the resistance tie to
PROG pin, to identify the default battery cell count and
determine the default power-on battery charging
current:
1s and 2s: 2 A
3s and 4s: 1A
Type : RW
Range : 50 mA-5000 mA
Fixed Offset : 0 mA
Bit Step Size : 10 mA
Clamped Low
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8.5.1.4 REG05_Input_Voltage_Limit Register (Offset = 5h) [reset = 24h]
REG05_Input_Voltage_Limit is shown in 图8-26 and described in 表8-11.
Return to the 表8-6.
Input Voltage Limit
图8-26. REG05_Input_Voltage_Limit Register
7
6
5
4
3
2
1
0
VINDPM_7:0
R/W-24h
表8-11. REG05_Input_Voltage_Limit Register Field Descriptions
Bit
7-0
Field
Type
Reset
Description
VINDPM_7:0
R/W
24h
Absolute VINDPM Threshold
VINDPM register is reset to 3600mV upon adapter unplugged and it
is set to the value based on the VBUS measurement when the
adapter plugs in. It is not reset by the REG_RST and the
WATCHDOG
Type : RW
POR: 3600 mV (24h)
Range : 3600 mV-22000 mV
Fixed Offset : 0 mV
Bit Step Size : 100 mV
Clamped Low
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8.5.1.5 REG06_Input_Current_Limit Register (Offset = 6h) [reset = 12Ch]
REG06_Input_Current_Limit is shown in 图8-27 and described in 表8-12.
Return to the 表8-6.
Input Current Limit
图8-27. REG06_Input_Current_Limit Register
15
7
14
6
13
12
11
10
9
1
8
RESERVED
R-0h
IINDPM_8:0
R/W-12Ch
5
4
3
2
0
IINDPM_8:0
R/W-12Ch
表8-12. REG06_Input_Current_Limit Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
15-9
8-0
RESERVED
IINDPM_8:0
R
0h
RESERVED
R/W
12Ch
Reset by:
REG_RST
Based on D+/D- detection results:
USB SDP = 500 mA
USB CDP = 1.5 A
USB DCP = 3.25 A
Adjustable High Voltage DCP = 1.5 A
Unknown Adapter = 3 A
Non-Standard Adapter = 1 A/2 A/2.1 A/2.4 A
Type : RW
POR: 3000 mA (12Ch)
Range : 100 mA-3300 mA
Fixed Offset : 0 mA
Bit Step Size : 10 mA
Clamped Low
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8.5.1.6 REG08_Precharge_Control Register (Offset = 8h) [reset = C3h]
REG08_Precharge_Control is shown in 图8-28 and described in 表8-13.
Return to the 表8-6.
Precharge Control
图8-28. REG08_Precharge_Control Register
7
6
5
4
3
2
1
0
VBAT_LOWV_1:0
R/W-3h
IPRECHG_5:0
R/W-3h
表8-13. REG08_Precharge_Control Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-6
VBAT_LOWV_1:0
R/W
3h
Reset by:
REG_RST
Battery voltage thresholds for the transition from
precharge to fast charge, which is defined as a ratio of
battery regulation limit (VREG)
Type : RW
POR: 11b
0h = 15%*VREG
1h = 62.2%*VREG
2h = 66.7%*VREG
3h = 71.4%*VREG
5-0
IPRECHG_5:0
R/W
3h
Reset by:
WATCHDOG
REG_RST
Precharge current limit
Type : RW
POR: 120 mA (3h)
Range : 40 mA-2000 mA
Fixed Offset : 0 mA
Bit Step Size : 40 mA
Clamped Low
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8.5.1.7 REG09_Termination_Control Register (Offset = 9h) [reset = 5h]
REG09_Termination_Control is shown in 图8-29 and described in 表8-14.
Return to the 表8-6.
Termination Control
图8-29. REG09_Termination_Control Register
7
6
5
4
3
2
1
0
RESERVED
R-0h
REG_RST
R/W-0h
RESERVED
R/W-0h
ITERM_4:0
R/W-5h
表8-14. REG09_Termination_Control Register Field Descriptions
Bit
7
Field
Type
Reset
Notes
Description
RESERVED
REG_RST
R
0h
RESERVED
6
R/W
0h
Reset registers to default values and reset timer
Type : RW
POR: 0b
0h = Not reset
1h = Reset
5
RESERVED
ITERM_4:0
R/W
R/W
0h
5h
RESERVED
4-0
Reset by:
WATCHDOG
REG_RST
Termination current
Type : RW
POR: 200 mA (5h)
Range : 40 mA-1000 mA
Fixed Offset : 0 mA
Bit Step Size : 40 mA
Clamped Low
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8.5.1.8 REG0A_Re-charge_Control Register (Offset = Ah) [reset = X]
REG0A_Re-charge_Control is shown in 图8-30 and described in 表8-15.
Return to the 表8-6.
Re-charge Control
图8-30. REG0A_Re-charge_Control Register
7
6
5
4
3
2
1
0
CELL_1:0
R/W-X
TRECHG_1:0
R/W-2h
VRECHG_3:0
R/W-3h
表8-15. REG0A_Re-charge_Control Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-6
CELL_1:0
R/W
X
At POR, the charger reads the PROG pin resistance to
determine the battery cell count and update this CELL
bits accordingly.
Type : RW
0h = 1s
1h = 2s
2h = 3s
3h = 4s
5-4
TRECHG_1:0
R/W
2h
Reset by:
WATCHDOG
REG_RST
Battery recharge deglich time
Type : RW
POR: 10b
0h = 64ms
1h = 256ms
2h = 1024ms (default)
3h = 2048ms
3-0
VRECHG_3:0
R/W
3h
Reset by:
WATCHDOG
REG_RST
Battery Recharge Threshold Offset (Below VREG)
Type : RW
POR: 200 mV (3h)
Range : 50 mV-800 mV
Fixed Offset : 50 mV
Bit Step Size : 50 mV
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8.5.1.9 REG0B_Reserved Register (Offset = Bh) [reset = DCh]
Return to the 表8-6.
图8-31. REG0B_Reserved Register
15
7
14
6
13
12
11
10
2
9
8
0
RESERVED
R-0h
RESERVED
R-DCh
5
4
3
1
RESERVED
R-DCh
表8-16. REG0B_Reserved Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
RESERVED
RESERVED
15-11
10-0
RESERVED
RESERVED
R
0h
R
DCh
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8.5.1.10 REG0D_Pre-charge_Timer Register(Offset = Dh) [reset = 4Bh]
Return to the 表8-6.
图8-32. REG0D_Pre-charge_Timer Register
7
6
5
4
3
2
1
0
PRECHG_TMR
R/W-0h
RESERVED
R-4Bh
表8-17. REG0D_Pre-charge_Timer Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
PRECHG_TMR
RESERVED
R/W
0h
Reset by:
WATCHDOG
REG_RST
Pre-charge safety timer setting
Type : RW
POR: 0b
0h = 2 hrs (default)
1h = 0.5 hrs
6-0
R
4Bh
RESERVED
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8.5.1.11 REG0E_Timer_Control Register (Offset = Eh) [reset = 3Dh]
REG0E_Timer_Control is shown in 图8-33 and described in 表8-18.
Return to the 表8-6.
Timer Control
图8-33. REG0E_Timer_Control Register
7
6
5
4
3
2
1
0
TOPOFF_TMR_1:0
EN_TRICHG_T EN_PRECHG_ EN_CHG_TMR
CHG_TMR_1:0
R/W-2h
TMR2X_EN
MR
TMR
R/W-0h
R/W-1h
R/W-1h
R/W-1h
R/W-1h
表8-18. REG0E_Timer_Control Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-6
TOPOFF_TMR_1:0 R/W
0h
Reset by:
WATCHDOG
REG_RST
Top-off timer control
Type : RW
POR: 00b
0h = Disabled (default)
1h = 15 mins
2h = 30 mins
3h = 45 mins
5
4
EN_TRICHG_TMR R/W
EN_PRECHG_TMR R/W
1h
1h
1h
2h
Reset by:
WATCHDOG
REG_RST
Enable trickle charge timer (fixed as 1hr)
Type : RW
POR: 1b
0h = Disabled
1h = Enabled (default)
Reset by:
WATCHDOG
REG_RST
Enable pre-charge timer
Type : RW
POR: 1b
0h = Disabled
1h = Enabled (default)
3
EN_CHG_TMR
CHG_TMR_1:0
R/W
R/W
Reset by:
WATCHDOG
REG_RST
Enable fast charge timer
Type : RW
POR: 1b
0h = Disabled
1h = Enabled (default)
2-1
Reset by:
WATCHDOG
REG_RST
Fast charge timer setting
Type : RW
POR: 10b
0h = 5 hrs
1h = 8 hrs
2h = 12 hrs (default)
3h = 24 hrs
0
TMR2X_EN
R/W
1h
Reset by:
WATCHDOG
REG_RST
TMR2X_EN
Type : RW
POR: 1b
0h = Trickle charge, pre-charge and fast charge timer
NOT slowed by 2X during input DPM or thermal
regulation.
1h = Trickle charge, pre-charge and fast charge timer
slowed by 2X during input DPM or thermal regulation
(default)
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8.5.1.12 REG0F_Charger_Control_0 Register (Offset = Fh) [reset = A2h]
REG0F_Charger_Control_0 is shown in 图8-34 and described in 表8-19.
Return to the 表8-6.
Charger Control 0
图8-34. REG0F_Charger_Control_0 Register
7
6
5
4
3
2
1
0
EN_AUTO_IBA FORCE_IBATDI
EN_CHG
EN_ICO
FORCE_ICO
EN_HIZ
EN_TERM
RESERVED
TDIS
S
R/W-1h
R/W-0h
R/W-1h
R/W-0h
R/W-0h
R/W-0h
R/W-1h
R-0h
表8-19. REG0F_Charger_Control_0 Register Field Descriptions
Bit
7
Field
Type
Reset
Notes
Description
EN_AUTO_IBATDIS R/W
1h
Reset by:
Enable the auto battery discharging during the battery
REG_RST
OVP fault
Type : RW
POR: 1b
0h = The charger will NOT apply a discharging current
on BAT during battery OVP
1h = The charger will apply a discharging current on
BAT during battery OVP
6
FORCE_IBATDIS
R/W
0h
Reset by:
Force a battery discharging current
REG_RST
Type : RW
POR: 0b
0h = IDLE (default)
1h = Force the charger to apply a discharging current
on BAT regardless the battery OVP status
5
4
3
EN_CHG
EN_ICO
R/W
R/W
R/W
1h
0h
0h
Reset by:
WATCHDOG
REG_RST
Charger Enable Configuration
Type : RW
POR: 1b
0h = Charge Disable
1h = Charge Enable (default)
Reset by:
REG_RST
Input Current Optimizer (ICO) Enable
Type : RW
POR: 0b
0h = Disable ICO (default)
1h = Enable ICO
FORCE_ICO
Reset by:
WATCHDOG
REG_RST
Force start input current optimizer (ICO)
Note: This bit can only be set and returns 0 after ICO
starts. This bit only valid when EN_ICO = 1
Type : RW
POR: 0b
0h = Do NOT force ICO (Default)
1h = Force ICO start
2
1
EN_HIZ
R/W
R/W
0h
1h
Reset by:
REG_RST
Enable HIZ mode.
This bit will be also reset to 0, when the adapter is
plugged in at VBUS.
Type : RW
POR: 0b
0h = Disable (default)
1h = Enable
EN_TERM
Reset by:
WATCHDOG
REG_RST
Enable termination
Type : RW
POR: 1b
0h = Disable
1h = Enable (default)
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表8-19. REG0F_Charger_Control_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Notes
Description
0
RESERVED
R
0h
RESERVED
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8.5.1.13 REG10_Charger_Control_1 Register (Offset = 10h) [reset = 85h]
REG10_Charger_Control_1 is shown in 图8-35 and described in 表8-20.
Return to the 表8-6.
Charger Control 1
图8-35. REG10_Charger_Control_1 Register
7
6
5
4
3
2
1
0
RESERVED
R-0h
VAC_OVP_1:0
R/W-3h
WD_RST
R/W-0h
WATCHDOG_2:0
R/W-5h
表8-20. REG10_Charger_Control_1 Register Field Descriptions
Bit
7-6
5-4
Field
Type
Reset
Notes
Description
RESERVED
R
0h
RESERVED
VAC_OVP_1:0
R/W
3h
Reset by:
REG_RST
VAC_OVP thresholds
Type : RW
POR: 11b
0h = 26 V
1h = 22 V
2h = 12 V
3h = 7 V (default)
3
WD_RST
R/W
R/W
0h
5h
Reset by:
WATCHDOG
REG_RST
I2C watch dog timer reset
Type : RW
POR: 0b
0h = Normal (default)
1h = Reset (this bit goes back to 0 after timer resets)
2-0
WATCHDOG_2:0
Reset by:
REG_RST
Watchdog timer settings
Type : RW
POR: 101b
0h = Disable
1h = 0.5s
2h = 1s
3h = 2s
4h = 20s
5h = 40s (default)
6h = 80s
7h = 160s
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8.5.1.14 REG11_Charger_Control_2 Register (Offset = 11h) [reset = 40h]
REG11_Charger_Control_2 is shown in 图8-36 and described in 表8-21.
Return to the 表8-6.
Charger Control 2
图8-36. REG11_Charger_Control_2 Register
7
6
5
4
3
2
1
0
FORCE_INDET AUTO_INDET_
EN
EN_12V
EN_9V
HVDCP_EN
SDRV_CTRL_1:0
R/W-0h
SDRV_DLY
R/W-0h
R/W-1h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-21. REG11_Charger_Control_2 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
6
FORCE_INDET
R/W
0h
Reset by:
WATCHDOG
REG_RST
Force D+/D- detection
Type : RW
POR: 0b
0h = Do NOT force D+/D- detection (default)
1h = Force D+/D- algorithm, when D+/D- detection is
done, this bit will be reset to 0
AUTO_INDET_EN
R/W
1h
Reset by:
Automatic D+/D- Detection Enable
WATCHDOG
REG_RST
Type : RW
POR: 1b
0h = Disable D+/D- detection when VBUS is plugged-
in
1h = Enable D+/D- detection when VBUS is plugged-in
(default)
5
4
EN_12V
R/W
R/W
R/W
R/W
0h
0h
0h
0h
Reset by:
REG_RST
EN_12V HVDC
Type : RW
POR: 0b
0h = Disable 12 V mode in HVDCP (default)
1h = Enable 12 V mode in HVDCP
EN_9V
Reset by:
REG_RST
EN_9V HVDC
Type : RW
POR: 0b
0h = Disable 9 V mode in HVDCP (default)
1h = Enable 9 V mode in HVDCP
3
HVDCP_EN
SDRV_CTRL_1:0
Reset by:
REG_RST
High voltage DCP enable.
Type : RW
POR: 0b
0h = Disable HVDCP handshake (default)
1h = Enable HVDCP handshake
2-1
Reset by:
SFET control
REG_RST
The external ship FET control logic to force the device
enter different modes.
Type : RW
POR: 00b
0h = IDLE (default)
1h = Shutdown Mode
2h = Ship Mode
3h = System Power Reset
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表8-21. REG11_Charger_Control_2 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Notes
Description
0
SDRV_DLY
R/W
0h
Reset by:
Delay time added to the taking action in bit [2:1] of the
REG_RST
SFET control
Type : RW
POR: 0b
0h = Add 10s delay time (default)
1h = Do NOT add 10s delay time
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8.5.1.15 REG12_Charger_Control_3 Register (Offset = 12h) [reset = 0h]
REG12_Charger_Control_3 is shown in 图8-37 and described in 表8-22.
Return to the 表8-6.
Charger Control 3
图8-37. REG12_Charger_Control_3 Register
7
6
5
4
3
2
1
0
DIS_ACDRV
RESERVED
RESERVED PFM_FWD_DIS WKUP_DLY
DIS_LDO
RESERVED
DIS_FWD_OO
A
R/W-0h
R-0h
R/W-0h R/W-0h R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-22. REG12_Charger_Control_3 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
DIS_ACDRV
R/W
0h
When this bit is set, the charger will force both
EN_ACDRV1 = 0 and EN_ACDRV2 = 0
Type : RW
POR: 0b
6
5
4
RESERVED
R
0h
0h
0h
RESERVED
R
PFM_FWD_DIS
R/W
Reset by:
REG_RST
Disable PFM in forward mode
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
3
2
WKUP_DLY
DIS_LDO
R/W
R/W
0h
0h
Reset by:
REG_RST
When wake up the device from ship mode, how much
time (tSM_EXIT) is required to pull low the QON pin.
Type : RW
POR: 0b
0h = 1s (Default)
1h = 15ms
Reset by:
Disable BATFET LDO mode in pre-charge stage.
WATCHDOG
REG_RST
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
1
0
RESERVED
R
0h
0h
DIS_FWD_OOA
R/W
Reset by:
REG_RST
Disable OOA in forward mode
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
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8.5.1.16 REG13_Charger_Control_4 Register (Offset = 13h) [reset = X]
REG13_Charger_Control_4 is shown in 图8-38 and described in 表8-23.
Return to the 表8-6.
Charger Control 4
图8-38. REG13_Charger_Control_4 Register
7
6
5
4
3
2
1
0
EN_ACDRV2
EN_ACDRV1
PWM_FREQ
DIS_STAT
DIS_VSYS_SH
ORT
RESERVED FORCE_VINDP EN_IBUS_OCP
M_DET
R/W-0h
R/W-0h
R/W-X
R/W-0h
R/W-0h
R/W-0h
R-0h
R/W-1h
表8-23. REG13_Charger_Control_4 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
EN_ACDRV2
R/W
0h
External ACFET2-RBFET2 gate driver control
At POR, if the charger detects that there is no
ACFET2-RBFET2 populated, this bit will be locked at 0
Type : RW
POR: 0b
0h = turn off (default)
1h = turn on
6
EN_ACDRV1
R/W
0h
External ACFET1-RBFET1 gate driver control
At POR, if the charger detects that there is no
ACFET1-RBFET1 populated, this bit will be locked at 0
Type : RW
POR: 0b
0h = turn off (default)
1h = turn on
5
4
3
PWM_FREQ
DIS_STAT
R/W
R/W
X
Switching frequency selection, this bit POR default
value is based on the PROG pin strapping.
Type : RW
0h = 1.5 MHz
1h = 750 kHz
0h
0h
Reset by:
WATCHDOG
REG_RST
Disable the STAT pin output
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
DIS_VSYS_SHORT R/W
Reset by:
Disable forward mode VSYS short hiccup protection.
REG_RST
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
2
1
RESERVED
R
0h
0h
RESERVED
FORCE_VINDPM_D R/W
ET
Reset by:
REG_RST
Force VINDPM detection
Note: only when VBAT>VSYSMIN, this bit can be set
to 1. Once the VINDPM auto detection is done, this
bits returns to 0.
Type : RW
POR: 0b
0h = Do NOT force VINDPM detection (default)
1h = Force the converter stop switching, and ADC
measures the VBUS voltage without input current, then
the charger updates the VINDPM register accordingly.
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表8-23. REG13_Charger_Control_4 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Notes
Description
0
EN_IBUS_OCP
R/W
1h
Reset by:
Enable IBUS_OCP in forward mode
REG_RST
Type : RW
POR: 1b
0h = Disable
1h = Enable (default)
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8.5.1.17 REG14_Charger_Control_5 Register (Offset = 14h) [reset = 16h]
REG14_Charger_Control_5 is shown in 图8-39 and described in 表8-24.
Return to the 表8-6.
Charger Control 5
图8-39. REG14_Charger_Control_5 Register
7
6
5
4
3
2
1
0
SFET_PRESEN RESERVED
T
EN_IBAT
RESERVED
R-2h
EN_IINDPM
EN_EXTILIM
EN_BATOC
R/W-0h
R-0h
R/W-0h
R/W-1h
R/W-1h
R/W-0h
表8-24. REG14_Charger_Control_5 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
SFET_PRESENT
R/W
0h
The user has to set this bit based on whether a ship
FET is populated or not. The POR default value is 0,
which means the charger does not support all the
features associated with the ship FET. The register bits
list below all are locked at 0.
EN_BATOC = 0
FORCE_SFET_OFF = 0
SDRV_CTRL = 00
When this bit is set to 1, the register bits list above
become programmable, and the charger can support
the features associated with the ship FET
Type : RW
POR: 0b
0h = No ship FET populated
1h = Ship FET populated
6
5
RESERVED
EN_IBAT
R
0h
0h
RESERVED
R/W
Reset by:
WATCHDOG
REG_RST
IBAT pin output enable
Type : RW
POR: 0b
0h = IBAT pin output is disabled (default)
1h = IBAT pin output is enable
4-3
2
RESERVED
EN_IINDPM
R
2h
1h
RESERVED
R/W
Reset by:
Enable the internal IINDPM register input current
WATCHDOG
REG_RST
regulation
Type : RW
POR: 1b
0h = Disable
1h = Enable (default)
1
0
EN_EXTILIM
EN_BATOC
R/W
R/W
1h
0h
Reset by:
REG_RST
Enable the external ILIM_HIZ pin input current
regulation
Type : RW
POR: 1b
0h = Disable
1h = Enable (default)
Reset by:
Enable the battery discharging current OCP
WATCHDOG
REG_RST
Type : RW
POR: 0b
0h = Disable (default)
1h = Enable
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8.5.1.18 REG15_Reserved Register (Offset = 15h) [reset = 00h]
REG15_Reserved is shown in 图8-40 and described in 表8-25.
Return to the 表8-6.
Reserved Register
图8-40. REG15_Reserved Register
7
6
5
4
3
2
1
0
Reserved
R-0h
表8-25. REG15_Reserved Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-0
Reserved
R
0h
Reserved
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8.5.1.19 REG16_Temperature_Control Register (Offset = 16h) [reset = C0h]
REG16_Temperature_Control is shown in 图8-41 and described in 表8-26.
Return to the 表8-6.
Temperature Control
图8-41. REG16_Temperature_Control Register
7
6
5
4
3
2
1
0
TREG_1:0
R/W-3h
TSHUT_1:0
R/W-0h
VBUS_PD_EN VAC1_PD_EN VAC2_PD_EN
R/W-0h R/W-0h R/W-0h
RESERVED
R-0h
表8-26. REG16_Temperature_Control Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-6
TREG_1:0
R/W
3h
Reset by:
WATCHDOG
REG_RST
Thermal regulation thresholds.
Type : RW
POR: 11b
0h = 60°C
1h = 80°C
2h = 100°C
3h = 120°C (default)
5-4
TSHUT_1:0
R/W
0h
Reset by:
WATCHDOG
REG_RST
Thermal shutdown thresholds.
Type : RW
POR: 00b
0h = 150°C (default)
1h = 130°C
2h = 120°C
3h = 85°C
3
2
1
0
VBUS_PD_EN
VAC1_PD_EN
VAC2_PD_EN
RESERVED
R/W
R/W
R/W
R
0h
0h
0h
0h
Reset by:
REG_RST
Enable VBUS pull down resistor (6k Ohm)
Type : RW
POR: 0b
0h = Disable (default)
1h = Enable
Reset by:
REG_RST
Enable VAC1 pull down resistor
Type : RW
POR: 0b
0h = Disable (default)
1h = Enable
Reset by:
REG_RST
Enable VAC2 pull down resistor
Type : RW
POR: 0b
0h = Disable (default)
1h = Enable
RESERVED
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8.5.1.20 REG17_NTC_Control_0 Register (Offset = 17h) [reset = 7Ah]
REG17_NTC_Control_0 is shown in 图8-42 and described in 表8-27.
Return to the 表8-6.
NTC Control 0
图8-42. REG17_NTC_Control_0 Register
7
6
5
4
3
2
1
0
JEITA_VSET_2:0
R/W-3h
JEITA_ISETH_1:0
R/W-3h
JEITA_ISETC_1:0
R/W-1h
RESERVED
R-0h
表8-27. REG17_NTC_Control_0 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-5
JEITA_VSET_2:0
R/W
3h
Reset by:
JEITA high temperature range (TWARN –THOT)
WATCHDOG
REG_RST
charge voltage setting
Type : RW
POR: 011b
0h = Charge Suspend
1h = Set VREG to VREG - 800 mV
2h = Set VREG to VREG - 600 mV
3h = Set VREG to VREG - 400 mV (default)
4h = Set VREG to VREG - 300 mV
5h = Set VREG to VREG - 200 mV
6h = Set VREG to VREG - 100 mV
7h = VREG unchanged
4-3
2-1
0
JEITA_ISETH_1:0
JEITA_ISETC_1:0
RESERVED
R/W
R/W
R
3h
1h
0h
Reset by:
WATCHDOG
REG_RST
JEITA high temperature range (TWARN –THOT)
charge current setting
Type : RW
POR: 11b
0h = Charge Suspend
1h = Set ICHG to 20%* ICHG
2h = Set ICHG to 40%* ICHG
3h = ICHG unchanged (default)
Reset by:
WATCHDOG
REG_RST
JEITA low temperature range (TCOLD –TCOOL)
charge current setting
Type : RW
POR: 01b
0h = Charge Suspend
1h = Set ICHG to 20%* ICHG (default)
2h = Set ICHG to 40%* ICHG
3h = ICHG unchanged
Reserved
Type : R
POR: 0b
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8.5.1.21 REG18_NTC_Control_1 Register (Offset = 18h) [reset = 54h]
REG18_NTC_Control_1 is shown in 图8-43 and described in 表8-28.
Return to the 表8-6.
NTC Control 1
图8-43. REG18_NTC_Control_1 Register
7
6
5
4
3
2
1
0
TS_COOL_1:0
R/W-1h
TS_WARM_1:0
R/W-1h
RESERVED
R-1h
RESERVED
R-0h
TS_IGNORE
R/W-0h
表8-28. REG18_NTC_Control_1 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7-6
TS_COOL_1:0
R/W
1h
Reset by:
JEITA VT2 comparator voltage rising thresholds as a
WATCHDOG
REG_RST
percentage of REGN. The corresponding temperature
in the brackets is achieved when a 103AT NTC
thermistor is used, RT1 = 5.24 kΩand RT2 = 30.31
kΩ.
Type : RW
POR: 01b
0h = 71.1% (5°C)
1h = 68.4% (default) (10°C)
2h = 65.5% (15°C)
3h = 62.4% (20°C)
5-4
TS_WARM_1:0
R/W
1h
Reset by:
WATCHDOG
REG_RST
JEITA VT3 comparator voltage falling thresholds as a
percentage of REGN. The corresponding temperature
in the brackets is achieved when a 103AT NTC
thermistor is used, RT1 = 5.24kΩand RT2 =
30.31kΩ.
Type : RW
POR: 01b
0h = 48.4% (40°C)
1h = 44.8% (default) (45°C)
2h = 41.2% (50°C)
3h = 37.7% (55°C)
3-2
1
RESERVED
RESERVED
TS_IGNORE
R
1h
0h
0h
RESERVED
RESERVED
R
0
R/W
Reset by:
WATCHDOG
REG_RST
Ignore the TS feedback, the charger considers the TS
is always good to allow charging. bITS [5:2] always
stay at 0000 to report the normal condition.
Type : RW
POR: 0b
0h = NOT ignore (Default)
1h = Ignore
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8.5.1.22 REG19_ICO_Current_Limit Register (Offset = 19h) [reset = 0h]
REG19_ICO_Current_Limit is shown in 图8-44 and described in 表8-29.
Return to the 表8-6.
ICO Current Limit
图8-44. REG19_ICO_Current_Limit Register
15
7
14
6
13
12
11
10
9
1
8
RESERVED
R-0h
ICO_ILIM_8:0
R-0h
5
4
3
2
0
ICO_ILIM_8:0
R-0h
表8-29. REG19_ICO_Current_Limit Register Field Descriptions
Bit
Field
Type
Reset
Description
15-9
8-0
RESERVED
R
0h
RESERVED
ICO_ILIM_8:0
R
0h
Input Current Limit obtained from ICO or ILIM_HIZ pin setting
Type : R
POR: 0 mA (0h)
Range : 100 mA-3300 mA
Fixed Offset : 0 mA
Bit Step Size : 10 mA
Clamped Low
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8.5.1.23 REG1B_Charger_Status_0 Register (Offset = 1Bh) [reset = 0h]
REG1B_Charger_Status_0 is shown in 图8-45 and described in 表8-30.
Return to the 表8-6.
Charger Status 0
图8-45. REG1B_Charger_Status_0 Register
7
6
5
4
3
2
1
0
IINDPM_STAT VINDPM_STAT
WD_STAT
POORSRC_ST
AT
PG_STAT
AC2_PRESENT AC1_PRESENT VBUS_PRESE
_STAT
_STAT
NT_STAT
R-0h R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-30. REG1B_Charger_Status_0 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
6
5
4
3
2
IINDPM_STAT
R
0h
IINDPM status (forward mode)
Type : R
POR: 0b
0h = Normal
1h = In IINDPM regulation
VINDPM_STAT
R
R
R
R
R
0h
0h
0h
0h
0h
VINDPM status (forward mode)
Type : R
POR: 0b
0h = Normal
1h = In VINDPM regulation
WD_STAT
I2C watch dog timer status
Type : R
POR: 0b
0h = Normal
1h = WD timer expired
POORSRC_STAT
Poor source detection status
Type : R
POR: 0b
0h = Normal
1h = Weak adaptor detected
PG_STAT
Power Good Status
Type : R
POR: 0b
0h = NOT in power good status
1h = Power good
AC2_PRESENT_STAT
VAC2 insert status
Type : R
POR: 0b
0h = VAC2 NOT present
1h = VAC2 present (above present threshold)
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表8-30. REG1B_Charger_Status_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
1
AC1_PRESENT_STAT
R
0h
VAC1 insert status
Type : R
POR: 0b
0h = VAC1 NOT present
1h = VAC1 present (above present threshold)
0
VBUS_PRESENT_STAT
R
0h
VBUS present status
Type : R
POR: 0b
0h = VBUS NOT present
1h = VBUS present (above present threshold)
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8.5.1.24 REG1C_Charger_Status_1 Register (Offset = 1Ch) [reset = 0h]
REG1C_Charger_Status_1 is shown in 图8-46 and described in 表8-31.
Return to the 表8-6.
Charger Status 1
图8-46. REG1C_Charger_Status_1 Register
7
6
5
4
3
2
1
0
CHG_STAT_2:0
VBUS_STAT_3:0
R-0h
BC1.2_DONE_
STAT
R-0h
R-0h
表8-31. REG1C_Charger_Status_1 Register Field Descriptions
Bit
7-5
Field
Type
Reset
Description
CHG_STAT_2:0
R
0h
Charge Status bits
Type : R
POR: 000b
0h = Not Charging
1h = Trickle Charge
2h = Pre-charge
3h = Fast charge (CC mode)
4h = Taper Charge (CV mode)
5h = Reserved
6h = Top-off Timer Active Charging
7h = Charge Termination Done
4-1
VBUS_STAT_3:0
R
0h
VBUS status bits
0h: No Input
1h: USB SDP (500 mA)
2h: USB CDP (1.5 A)
3h: USB DCP (3.25 A)
4h: Adjustable High Voltage DCP (HVDCP) (1.5 A)
5h: Unknown adaptor (3 A)
6h: Non-Standard Adapter (1 A/2 A/2.1 A/2.4 A)
7h: Reserved
8h: Not qualified adaptor
9h: Reserved
Ah: Reserved
Bh: Device directly powered from VBUS
Ch: Reserved
Dh: Reserved
Eh: Reserved
Fh: Reserved
Type : R
POR: 0h
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表8-31. REG1C_Charger_Status_1 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
0
BC1.2_DONE_STAT
R
0h
BC1.2 status bit
Type : R
POR: 0b
0h = BC1.2 or non-standard detection NOT complete
1h = BC1.2 or non-standard detection complete
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8.5.1.25 REG1D_Charger_Status_2 Register (Offset = 1Dh) [reset = 0h]
REG1D_Charger_Status_2 is shown in 图8-47 and described in 表8-32.
Return to the 表8-6.
Charger Status 2
图8-47. REG1D_Charger_Status_2 Register
7
6
5
4
3
2
1
0
ICO_STAT_1:0
R-0h
RESERVED
TREG_STAT
DPDM_STAT VBAT_PRESEN
T_STAT
R-0h
R-0h
R-0h
R-0h
表8-32. REG1D_Charger_Status_2 Register Field Descriptions
Bit
Field
Type
Reset
Description
7-6
ICO_STAT_1:0
R
0h
Input Current Optimizer (ICO) status
Type : R
POR: 00b
0h = ICO disabled
1h = ICO optimization in progress
2h = Maximum input current detected
3h = Reserved
5-3
2
RESERVED
TREG_STAT
R
R
0h
0h
RESERVED
IC thermal regulation status
Type : R
POR: 0b
0h = Normal
1h = Device in thermal regulation
1
0
DPDM_STAT
R
R
0h
0h
D+/D- detection status bits
Type : R
POR: 0b
0h = The D+/D- detection is NOT started yet, or the detection is done
1h = The D+/D- detection is ongoing
VBAT_PRESENT_STAT
Battery present status (VBAT > VBAT_UVLOZ
)
Type : R
POR: 0b
0h = VBAT NOT present
1h = VBAT present
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8.5.1.26 REG1E_Charger_Status_3 Register (Offset = 1Eh) [reset = 0h]
REG1E_Charger_Status_3 is shown in 图8-48 and described in 表8-33.
Return to the 表8-6.
Charger Status 3
图8-48. REG1E_Charger_Status_3 Register
7
6
5
4
3
2
1
0
ACRB2_STAT ACRB1_STAT ADC_DONE_S
TAT
VSYS_STAT
CHG_TMR_ST TRICHG_TMR_ PRECHG_TMR
RESERVED
AT
STAT
_STAT
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-33. REG1E_Charger_Status_3 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
6
5
4
3
2
ACRB2_STAT
R
0h
The ACFET2-RBFET2 status
Type : R
POR: 0b
0h = ACFET2-RBFET2 is NOT placed
1h = ACFET2-RBFET2 is placed
ACRB1_STAT
R
R
R
R
R
0h
0h
0h
0h
0h
The ACFET1-RBFET1 status
Type : R
POR: 0b
0h = ACFET1-RBFET1 is NOT placed
1h = ACFET1-RBFET1 is placed
ADC_DONE_STAT
ADC Conversion Status (in one-shot mode only)
Type : R
POR: 0b
0h = Conversion NOT complete
1h = Conversion complete
VSYS_STAT
VSYS Regulation Status (forward mode)
Type : R
POR: 0b
0h = Not in VSYSMIN regulation (VBAT > VSYSMIN
)
1h = In VSYSMIN regulation (VBAT < VSYSMIN
)
CHG_TMR_STAT
Fast charge timer status
Type : R
POR: 0b
0h = Normal
1h = Safety timer expired
TRICHG_TMR_STAT
Trickle charge timer status
Type : R
POR: 0b
0h = Normal
1h = Safety timer expired
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表8-33. REG1E_Charger_Status_3 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
1
PRECHG_TMR_STAT
R
0h
Pre-charge timer status
Type : R
POR: 0b
0h = Normal
1h = Safety timer expired
0
RESERVED
R
0h
RESERVED
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8.5.1.27 REG1F_Charger_Status_4 Register (Offset = 1Fh) [reset = 0h]
REG1F_Charger_Status_4 is shown in 图8-49 and described in 表8-34.
Return to the 表8-6.
Charger Status 4
图8-49. REG1F_Charger_Status_4 Register
7
6
5
4
3
2
1
0
RESERVED
R-0h
TS_COLD_STA TS_COOL_STA TS_WARM_ST TS_HOT_STAT
T
T
AT
R-0h
R-0h
R-0h
R-0h
表8-34. REG1F_Charger_Status_4 Register Field Descriptions
Bit
Field
Type
Reset
Description
7-4
3
RESERVED
R
0h
RESERVED
TS_COLD_STAT
R
R
R
R
0h
0h
0h
0h
The TS temperature is in the cold range, lower than T1.
Type : R
POR: 0b
0h = TS status is NOT in cold range
1h = TS status is in cold range
2
1
0
TS_COOL_STAT
TS_WARM_STAT
TS_HOT_STAT
The TS temperature is in the cool range, between T1 and T2.
Type : R
POR: 0b
0h = TS status is NOT in cool range
1h = TS status is in cool range
The TS temperature is in the warm range, between T3 and T5.
Type : R
POR: 0b
0h = TS status is NOT in warm range
1h = TS status is in warm range
The TS temperature is in the hot range, higher than T5.
Type : R
POR: 0b
0h = TS status is NOT in hot range
1h = TS status is in hot range
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8.5.1.28 REG20_FAULT_Status_0 Register (Offset = 20h) [reset = 0h]
REG20_FAULT_Status_0 is shown in 图8-50 and described in 表8-35.
Return to the 表8-6.
FAULT Status 0
图8-50. REG20_FAULT_Status_0 Register
7
6
5
4
3
2
1
0
IBAT_REG_ST VBUS_OVP_ST VBAT_OVP_ST IBUS_OCP_ST IBAT_OCP_ST CONV_OCP_S VAC2_OVP_ST VAC1_OVP_ST
AT
AT
AT
AT
AT
TAT
AT
AT
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-35. REG20_FAULT_Status_0 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
6
5
4
3
2
IBAT_REG_STAT
VBUS_OVP_STAT
VBAT_OVP_STAT
IBUS_OCP_STAT
IBAT_OCP_STAT
CONV_OCP_STAT
R
0h
IBAT regulation status
Type : R
POR: 0b
0h = Normal
1h = Device in battery discharging current regulation
R
R
R
R
R
0h
0h
0h
0h
0h
VBUS over-voltage status
Type : R
POR: 0b
0h = Normal
1h = Device in overvoltage protection
VBAT overvoltage status
Type : R
POR: 0b
0h = Normal
1h = Device in overvoltage protection
IBUS overcurrent status
Type : R
POR: 0b
0h = Normal
1h = Device in overcurrent protection
IBAT overcurrent status
Type : R
POR: 0b
0h = Normal
1h = Device in overcurrent protection
Converter overcurrent status
Type : R
POR: 0b
0h = Normal
1h = Converter in overcurrent protection
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表8-35. REG20_FAULT_Status_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
1
VAC2_OVP_STAT
R
0h
VAC2 overvoltage status
Type : R
POR: 0b
0h = Normal
1h = Device in overvoltage protection
0
VAC1_OVP_STAT
R
0h
VAC1 overvoltage status
Type : R
POR: 0b
0h = Normal
1h = Device in overvoltage protection
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8.5.1.29 REG21_FAULT_Status_1 Register (Offset = 21h) [reset = 0h]
REG21_FAULT_Status_1 is shown in 图8-51 and described in 表8-36.
Return to the 表8-6.
FAULT Status 1
图8-51. REG21_FAULT_Status_1 Register
7
6
5
4
3
2
1
0
VSYS_SHORT VSYS_OVP_ST
RESERVED
TSHUT_STAT
RESERVED
_STAT
AT
R-0h
R-0h
R-0h
R-0h
R-0h
表8-36. REG21_FAULT_Status_1 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
VSYS_SHORT_STAT
R
0h
VSYS short circuit status
Type : R
POR: 0b
0h = Normal
1h = Device in SYS short circuit protection
6
VSYS_OVP_STAT
R
0h
VSYS overvoltage status
Type : R
POR: 0b
0h = Normal
1h = Device in SYS overvoltage protection
RESERVED
5-3
2
RESERVED
R
R
0h
0h
TSHUT_STAT
IC temperature shutdown status
Type : R
POR: 0b
0h = Normal
1h = Device in thermal shutdown protection
RESERVED
1-0
RESERVED
R
0h
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8.5.1.30 REG22_Charger_Flag_0 Register (Offset = 22h) [reset = 0h]
REG22_Charger_Flag_0 is shown in 图8-52 and described in 表8-37.
Return to the 表8-6.
Charger Flag 0
图8-52. REG22_Charger_Flag_0 Register
7
6
5
4
3
2
1
0
IINDPM_FLAG VINDPM_FLAG
WD_FLAG
POORSRC_FL
AG
PG_FLAG
AC2_PRESENT AC1_PRESENT VBUS_PRESE
_FLAG
_FLAG
NT_FLAG
R-0h R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-37. REG22_Charger_Flag_0 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
6
5
4
3
IINDPM_FLAG
VINDPM_FLAG
WD_FLAG
R
0h
IINDPM flag
Type : R
POR: 0b
0h = Normal
1h = IINDPM signal rising edge detected
R
R
R
R
0h
0h
0h
0h
VINDPM flag
Type : R
POR: 0b
0h = Normal
1h = VINDPM signal rising edge detected
I2C watchdog timer flag
Type : R
POR: 0b
0h = Normal
1h = WD timer signal rising edge detected
POORSRC_FLAG
Poor source detection flag
Type : R
POR: 0b
0h = Normal
1h = Poor source status rising edge detected
PG_FLAG
Power good flag
Type : R
POR: 0b
0h = Normal
1h = Any change in PG_STAT even (adapter good qualification or
adapter good going away)
2
AC2_PRESENT_FLAG
R
0h
VAC2 present flag
Type : R
POR: 0b
0h = Normal
1h = VAC2 present status changed
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表8-37. REG22_Charger_Flag_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
1
AC1_PRESENT_FLAG
R
0h
VAC1 present flag
Type : R
POR: 0b
0h = Normal
1h = VAC1 present status changed
0
VBUS_PRESENT_FLAG
R
0h
VBUS present flag
Type : R
POR: 0b
0h = Normal
1h = VBUS present status changed
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8.5.1.31 REG23_Charger_Flag_1 Register (Offset = 23h) [reset = 0h]
REG23_Charger_Flag_1 is shown in 图8-53 and described in 表8-38.
Return to the 表8-6.
Charger Flag 1
图8-53. REG23_Charger_Flag_1 Register
7
6
5
4
3
2
1
0
CHG_FLAG
ICO_FLAG
RESERVED
VBUS_FLAG
RESERVED
TREG_FLAG VBAT_PRESEN BC1.2_DONE_
T_FLAG
FLAG
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-38. REG23_Charger_Flag_1 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
CHG_FLAG
R
0h
Charge status flag
Type : R
POR: 0b
0h = Normal
1h = Charge status changed
6
ICO_FLAG
R
0h
ICO status flag
Type : R
POR: 0b
0h = Normal
1h = ICO status changed
5
4
RESERVED
VBUS_FLAG
R
R
0h
0h
RESERVED
VBUS status flag
Type : R
POR: 0b
0h = Normal
1h = VBUS status changed
3
2
RESERVED
TREG_FLAG
R
R
0h
0h
RESERVED
IC thermal regulation flag
Type : R
POR: 0b
0h = Normal
1h = TREG signal rising threshold detected
1
VBAT_PRESENT_FLAG
R
0h
VBAT present flag
Type : R
POR: 0b
0h = Normal
1h = VBAT present status changed
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表8-38. REG23_Charger_Flag_1 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
0
BC1.2_DONE_FLAG
R
0h
BC1.2 status Flag
Type : R
POR: 0b
0h = Normal
1h = BC1.2 detection status changed
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8.5.1.32 REG24_Charger_Flag_2 Register (Offset = 24h) [reset = 0h]
REG24_Charger_Flag_2 is shown in 图8-54 and described in 表8-39.
Return to the 表8-6.
Charger Flag 2
图8-54. REG24_Charger_Flag_2 Register
7
6
5
4
3
2
1
0
RESERVED
DPDM_DONE_ ADC_DONE_F
VSYS_FLAG
CHG_TMR_FL TRICHG_TMR_ PRECHG_TMR TOPOFF_TMR
FLAG
LAG
AG
FLAG
_FLAG
_FLAG
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-39. REG24_Charger_Flag_2 Register Field Descriptions
Bit
Field
RESERVED
Type
Reset
Description
7
R
0h
RESERVED
6
5
4
3
2
1
DPDM_DONE_FLAG
ADC_DONE_FLAG
VSYS_FLAG
R
R
R
R
R
R
0h
0h
0h
0h
0h
0h
D+/D- detection is done flag.
Type : R
POR: 0b
0h = D+/D- detection is NOT started or still ongoing
1h = D+/D- detection is completed
ADC conversion flag (only in one-shot mode)
Type : R
POR: 0b
0h = Conversion NOT completed
1h = Conversion completed
VSYSMIN regulation flag
Type : R
POR: 0b
0h = Normal
1h = Entered or existed VSYSMIN regulation
CHG_TMR_FLAG
TRICHG_TMR_FLAG
PRECHG_TMR_FLAG
Fast charge timer flag
Type : R
POR: 0b
0h = Normal
1h = Fast charge timer expired rising edge detected
Trickle charge timer flag
Type : R
POR: 0b
0h = Normal
1h = Trickle charger timer expired rising edge detected
Pre-charge timer flag
Type : R
POR: 0b
0h = Normal
1h = Pre-charge timer expired rising edge detected
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表8-39. REG24_Charger_Flag_2 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
0
TOPOFF_TMR_FLAG
R
0h
Top off timer flag
Type : R
POR: 0b
0h = Normal
1h = Top off timer expired rising edge detected
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8.5.1.33 REG25_Charger_Flag_3 Register (Offset = 25h) [reset = 0h]
REG25_Charger_Flag_3 is shown in 图8-55 and described in 表8-40.
Return to the 表8-6.
Charger Flag 3
图8-55. REG25_Charger_Flag_3 Register
7
6
5
4
3
2
1
0
RESERVED
R-0h
TS_COLD_FLA TS_COOL_FLA TS_WARM_FL TS_HOT_FLAG
G
G
AG
R-0h
R-0h
R-0h
R-0h
表8-40. REG25_Charger_Flag_3 Register Field Descriptions
Bit
Field
Type
Reset
Description
7-4
3
RESERVED
R
0h
RESERVED
TS_COLD_FLAG
R
R
R
R
0h
0h
0h
0h
TS cold temperature flag
Type : R
POR: 0b
0h = Normal
1h = TS across cold temperature (T1) is detected
2
1
0
TS_COOL_FLAG
TS_WARM_FLAG
TS_HOT_FLAG
TS cool temperature flag
Type : R
POR: 0b
0h = Normal
1h = TS across cool temperature (T2) is detected
TS warm temperature flag
Type : R
POR: 0b
0h = Normal
1h = TS across warm temperature (T3) is detected
TS hot temperature flag
Type : R
POR: 0b
0h = Normal
1h = TS across hot temperature (T5) is detected
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8.5.1.34 REG26_FAULT_Flag_0 Register (Offset = 26h) [reset = 0h]
REG26_FAULT_Flag_0 is shown in 图8-56 and described in 表8-41.
Return to the 表8-6.
FAULT Flag 0
图8-56. REG26_FAULT_Flag_0 Register
7
6
5
4
3
2
1
0
IBAT_REG_FL VBUS_OVP_FL VBAT_OVP_FL IBUS_OCP_FL IBAT_OCP_FL CONV_OCP_F VAC2_OVP_FL VAC1_OVP_FL
AG
AG
AG
AG
AG
LAG
AG
AG
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
表8-41. REG26_FAULT_Flag_0 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
6
5
4
3
2
IBAT_REG_FLAG
VBUS_OVP_FLAG
VBAT_OVP_FLAG
IBUS_OCP_FLAG
IBAT_OCP_FLAG
CONV_OCP_FLAG
R
0h
IBAT regulation flag
Type : R
POR: 0b
0h = Normal
1h = Enter or exit IBAT regulation
R
R
R
R
R
0h
0h
0h
0h
0h
VBUS overvoltage flag
Type : R
POR: 0b
0h = Normal
1h = Enter VBUS OVP
VBAT overvoltage flag
Type : R
POR: 0b
0h = Normal
1h = Enter VBAT OVP
IBUS overcurrent flag
Type : R
POR: 0b
0h = Normal
1h = Enter IBUS OCP
IBAT overcurrent flag
Type : R
POR: 0b
0h = Normal
1h = Enter discharged OCP
Converter overcurrent flag
Type : R
POR: 0b
0h = Normal
1h = Enter converter OCP
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表8-41. REG26_FAULT_Flag_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
1
VAC2_OVP_FLAG
R
0h
VAC2 overvoltage flag
Type : R
POR: 0b
0h = Normal
1h = Enter VAC2 OVP
0
VAC1_OVP_FLAG
R
0h
VAC1 overvoltage flag
Type : R
POR: 0b
0h = Normal
1h = Enter VAC1 OVP
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8.5.1.35 REG27_FAULT_Flag_1 Register (Offset = 27h) [reset = 0h]
REG27_FAULT_Flag_1 is shown in 图8-57 and described in 表8-42.
Return to the 表8-6.
FAULT Flag 1
图8-57. REG27_FAULT_Flag_1 Register
7
6
5
4
3
2
1
0
VSYS_SHORT VSYS_OVP_FL
RESERVED
TSHUT_FLAG
RESERVED
_FLAG
AG
R-0h
R-0h
R-0h
R-0h
R-0h
表8-42. REG27_FAULT_Flag_1 Register Field Descriptions
Bit
Field
Type
Reset
Description
7
VSYS_SHORT_FLAG
R
0h
VSYS short circuit flag
Type : R
POR: 0b
0h = Normal
1h = Stop switching due to system short
6
VSYS_OVP_FLAG
R
0h
VSYS over-voltage flag
Type : R
POR: 0b
0h = Normal
1h = Stop switching due to system overvoltage
RESERVED
5-3
2
RESERVED
R
R
0h
0h
TSHUT_FLAG
IC thermal shutdown flag
Type : R
POR: 0b
0h = Normal
1h = TS shutdown signal rising threshold detected
RESERVED
1-0
RESERVED
R
0h
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8.5.1.36 REG28_Charger_Mask_0 Register (Offset = 28h) [reset = 0h]
REG28_Charger_Mask_0 is shown in 图8-58 and described in 表8-43.
Return to the 表8-6.
Charger Mask 0
图8-58. REG28_Charger_Mask_0 Register
7
6
5
4
3
2
1
0
IINDPM_MASK VINDPM_MAS
K
WD_MASK
POORSRC_MA
SK
PG_MASK
AC2_PRESENT AC1_PRESENT VBUS_PRESE
_MASK
_MASK
NT_MASK
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-43. REG28_Charger_Mask_0 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
6
5
IINDPM_MASK
VINDPM_MASK
WD_MASK
R/W
0h
Reset by:
REG_RST
IINDPM mask flag
Type : RW
POR: 0b
0h = Enter IINDPM does produce INT pulse
1h = Enter IINDPM does NOT produce INT pulse
R/W
R/W
0h
0h
Reset by:
REG_RST
VINDPM mask flag
Type : RW
POR: 0b
0h = Enter VINDPM does produce INT pulse
1h = Enter VINDPM does NOT produce INT pulse
Reset by:
REG_RST
I2C watch dog timer mask flag
Type : RW
POR: 0b
0h = I2C watch dog timer expired does produce INT
pulse
1h = I2C watch dog timer expired does NOT produce
INT pulse
4
3
2
POORSRC_MASK
PG_MASK
R/W
R/W
0h
0h
0h
Reset by:
REG_RST
Poor source detection mask flag
Type : RW
POR: 0b
0h = Poor source detected does produce INT
1h = Poor source detected does NOT produce INT
Reset by:
REG_RST
Power Good mask flag
Type : RW
POR: 0b
0h = PG toggle does produce INT
1h = PG toggle does NOT produce INT
AC2_PRESENT_MA R/W
SK
Reset by:
REG_RST
VAC2 present mask flag
Type : RW
POR: 0b
0h = VAC2 present status change does produce INT
1h = VAC2 present status change does NOT produce
INT
1
AC1_PRESENT_MA R/W
SK
0h
Reset by:
REG_RST
VAC1 present mask flag
Type : RW
POR: 0b
0h = VAC1 present status change does produce INT
1h = VAC1 present status change does NOT produce
INT
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表8-43. REG28_Charger_Mask_0 Register Field Descriptions (continued)
Bit
Field
Type
Reset
Notes
Description
0
VBUS_PRESENT_M R/W
ASK
0h
Reset by:
REG_RST
VBUS present mask flag
Type : RW
POR: 0b
0h = VBUS present status change does produce INT
1h = VBUS present status change does NOT produce
INT
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8.5.1.37 REG29_Charger_Mask_1 Register (Offset = 29h) [reset = 0h]
REG29_Charger_Mask_1 is shown in 图8-59 and described in 表8-44.
Return to the 表8-6.
Charger Mask 1
图8-59. REG29_Charger_Mask_1 Register
7
6
5
4
3
2
1
0
CHG_MASK
ICO_MASK
RESERVED
VBUS_MASK
RESERVED
TREG_MASK VBAT_PRESEN BC1.2_DONE_
T_MASK
MASK
R/W-0h
R/W-0h
R-0h
R/W-0h
R-0h
R/W-0h
R/W-0h
R/W-0h
表8-44. REG29_Charger_Mask_1 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
CHG_MASK
ICO_MASK
R/W
0h
Reset by:
REG_RST
Charge status mask flag
Type : RW
POR: 0b
0h = Charging status change does produce INT
1h = Charging status change does NOT produce INT
6
R/W
0h
Reset by:
REG_RST
ICO status mask flag
Type : RW
POR: 0b
0h = ICO status change does produce INT
1h = ICO status change does NOT produce INT
5
4
RESERVED
R
0h
0h
RESERVED
VBUS_MASK
R/W
Reset by:
REG_RST
VBUS status mask flag
Type : RW
POR: 0b
0h = VBUS status change does produce INT
1h = VBUS status change does NOT produce INT
3
2
RESERVED
R
0h
0h
RESERVED
TREG_MASK
R/W
Reset by:
REG_RST
IC thermal regulation mask flag
Type : RW
POR: 0b
0h = entering TREG does produce INT
1h = entering TREG does NOT produce INT
1
0
VBAT_PRESENT_M R/W
ASK
0h
0h
Reset by:
REG_RST
VBAT present mask flag
Type : RW
POR: 0b
0h = VBAT present status change does produce INT
1h = VBAT present status change does NOT produce
INT
BC1.2_DONE_MAS R/W
K
Reset by:
REG_RST
BC1.2 status mask flag
Type : RW
POR: 0b
0h = BC1.2 status change does produce INT
1h = BC1.2 status change does NOT produce INT
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8.5.1.38 REG2A_Charger_Mask_2 Register (Offset = 2Ah) [reset = 0h]
REG2A_Charger_Mask_2 is shown in 图8-60 and described in 表8-45.
Return to the 表8-6.
Charger Mask 2
图8-60. REG2A_Charger_Mask_2 Register
7
6
5
4
3
2
1
0
RESERVED
DPDM_DONE_ ADC_DONE_M VSYS_MASK CHG_TMR_MA TRICHG_TMR_ PRECHG_TMR TOPOFF_TMR
MASK
ASK
SK
MASK
_MASK
_MASK
R-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-45. REG2A_Charger_Mask_2 Register Field Descriptions
Bit
7
Field
RESERVED
Type
Reset
Notes
Description
R
0h
RESERVED
6
DPDM_DONE_MAS R/W
K
0h
Reset by:
REG_RST
D+/D- detection is done mask flag
Type : RW
POR: 0b
0h = D+/D- detection done does produce INT pulse
1h = D+/D- detection done does NOT produce INT
pulse
5
4
ADC_DONE_MASK R/W
0h
0h
Reset by:
REG_RST
ADC conversion mask flag (only in one-shot mode)
Type : RW
POR: 0b
0h = ADC conversion done does produce INT pulse
1h = ADC conversion done does NOT produce INT
pulse
VSYS_MASK
R/W
Reset by:
REG_RST
VSYS min regulation mask flag
Type : RW
POR: 0b
0h = enter or exit VSYSMIN regulation does produce
INT pulse
1h = enter or exit VSYSMIN regulation does NOT
produce INT pulse
3
2
CHG_TMR_MASK
R/W
0h
0h
Reset by:
REG_RST
Fast charge timer mask flag
Type : RW
POR: 0b
0h = Fast charge timer expire does produce INT
1h = Fast charge timer expire does NOT produce INT
TRICHG_TMR_MAS R/W
K
Reset by:
REG_RST
Trickle charge timer mask flag
Type : RW
POR: 0b
0h = Trickle charge timer expire does produce INT
1h = Trickle charge timer expire does NOT produce
INT
1
0
PRECHG_TMR_MA R/W
SK
0h
0h
Reset by:
REG_RST
Pre-charge timer mask flag
Type : RW
POR: 0b
0h = Pre-charge timer expire does produce INT
1h = Pre-charge timer expire does NOT produce INT
TOPOFF_TMR_MA R/W
SK
Reset by:
REG_RST
Top off timer mask flag
Type : RW
POR: 0b
0h = Top off timer expire does produce INT
1h = Top off timer expire does NOT produce INT
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8.5.1.39 REG2B_Charger_Mask_3 Register (Offset = 2Bh) [reset = 0h]
REG2B_Charger_Mask_3 is shown in 图8-61 and described in 表8-46.
Return to the 表8-6.
Charger Mask 3
图8-61. REG2B_Charger_Mask_3 Register
7
6
5
4
3
2
1
0
RESERVED
RESERVED
TS_COLD_MA TS_COOL_MA TS_WARM_MA TS_HOT_MAS
SK
SK
SK
K
R-0h
R-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-46. REG2B_Charger_Mask_3 Register Field Descriptions
Bit
7-5
4
Field
Type
Reset
Notes
Description
RESERVED
RESERVED
TS_COLD_MASK
R
0h
RESERVED
R/W
R/W
0h
3
0h
Reset by:
TS cold temperature interrupt mask
WATCHDOG
REG_RST
Type : RW
POR: 0b
0h = TS across cold temperature (T1) does produce
INT
1h = TS across cold temperature (T1) does NOT
produce INT
2
1
0
TS_COOL_MASK
TS_WARM_MASK
TS_HOT_MASK
R/W
R/W
R/W
0h
0h
0h
Reset by:
WATCHDOG
REG_RST
TS cool temperature interrupt mask
Type : RW
POR: 0b
0h = TS across cool temperature (T2) does produce
INT
1h = TS across cool temperature (T2) does NOT
produce INT
Reset by:
WATCHDOG
REG_RST
TS warm temperature interrupt mask
Type : RW
POR: 0b
0h = TS across warm temperature (T3) does produce
INT
1h = TS across warm temperature (T3) does NOT
produce INT
Reset by:
TS hot temperature interrupt mask
WATCHDOG
REG_RST
Type : RW
POR: 0b
0h = TS across hot temperature (T5) does produce
INT
1h = TS across hot temperature (T5) does NOT
produce INT
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8.5.1.40 REG2C_FAULT_Mask_0 Register (Offset = 2Ch) [reset = 0h]
REG2C_FAULT_Mask_0 is shown in 图8-62 and described in 表8-47.
Return to the 表8-6.
FAULT Mask 0
图8-62. REG2C_FAULT_Mask_0 Register
7
6
5
4
3
2
1
0
IBAT_REG_MA VBUS_OVP_M VBAT_OVP_M IBUS_OCP_MA IBAT_OCP_MA CONV_OCP_M VAC2_OVP_M VAC1_OVP_M
SK
ASK
ASK
SK
SK
ASK
ASK
ASK
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-47. REG2C_FAULT_Mask_0 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
IBAT_REG_MASK
R/W
0h
Reset by:
REG_RST
IBAT regulation mask flag
Type : RW
POR: 0b
0h = enter or exit IBAT regulation does produce INT
1h = enter or exit IBAT regulation does NOT produce
INT
6
5
4
3
2
1
0
VBUS_OVP_MASK R/W
VBAT_OVP_MASK R/W
0h
0h
0h
0h
0h
0h
0h
Reset by:
REG_RST
VBUS over-voltage mask flag
Type : RW
POR: 0b
0h = entering VBUS OVP does produce INT
1h = entering VBUS OVP does NOT produce INT
Reset by:
REG_RST
VBAT over-voltage mask flag
Type : RW
POR: 0b
0h = entering VBAT OVP does produce INT
1h = entering VBAT OVP does NOT produce INT
IBUS_OCP_MASK
IBAT_OCP_MASK
R/W
R/W
Reset by:
REG_RST
IBUS over-current mask flag
Type : RW
POR: 0b
0h = IBUS OCP fault does produce INT
1h = IBUS OCP fault does NOT produce INT
Reset by:
REG_RST
IBAT over-current mask flag
Type : RW
POR: 0b
0h = IBAT OCP fault does produce INT
1h = IBAT OCP fault does NOT produce INT
CONV_OCP_MASK R/W
VAC2_OVP_MASK R/W
VAC1_OVP_MASK R/W
Reset by:
REG_RST
Converter over-current mask flag
Type : RW
POR: 0b
0h = Converter OCP fault does produce INT
1h = Converter OCP fault does NOT produce INT
Reset by:
REG_RST
VAC2 over-voltage mask flag
Type : RW
POR: 0b
0h = entering VAC2 OVP does produce INT
1h = entering VAC2 OVP does NOT produce INT
Reset by:
REG_RST
VAC1 over-voltage mask flag
Type : RW
POR: 0b
0h = entering VAC1 OVP does produce INT
1h = entering VAC1 OVP does NOT produce INT
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8.5.1.41 REG2D_FAULT_Mask_1 Register (Offset = 2Dh) [reset = 0h]
REG2D_FAULT_Mask_1 is shown in 图8-63 and described in 表8-48.
Return to the 表8-6.
FAULT Mask 1
图8-63. REG2D_FAULT_Mask_1 Register
7
6
5
4
3
2
1
0
VSYS_SHORT VSYS_OVP_M
RESERVED
TSHUT_MASK
RESERVED
R-0h
_MASK
ASK
R/W-0h
R/W-0h
R-0h
R/W-0h
表8-48. REG2D_FAULT_Mask_1 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
VSYS_SHORT_MA R/W
SK
0h
Reset by:
REG_RST
VSYS short circuit mask flag
Type : RW
POR: 0b
0h = System short fault does produce INT
1h = System short fault does NOT produce INT
6
VSYS_OVP_MASK R/W
0h
Reset by:
REG_RST
VSYS over-voltage mask flag
Type : RW
POR: 0b
0h = System overvoltage fault does produce INT
1h = System overvoltage fault does NOT produce INT
5-3
2
RESERVED
R/W
R/W
0h
0h
RESERVED
TSHUT_MASK
Reset by:
REG_RST
IC thermal shutdown mask flag
Type : RW
POR: 0b
0h = TSHUT does produce INT
1h = TSHUT does NOT produce INT
1-0
RESERVED
R
0h
RESERVED
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8.5.1.42 REG2E_ADC_Control Register (Offset = 2Eh) [reset = 30h]
REG2E_ADC_Control is shown in 图8-64 and described in 表8-49.
Return to the 表8-6.
ADC Control
图8-64. REG2E_ADC_Control Register
7
6
5
4
3
2
1
0
RESERVED
R/W-0h
ADC_EN
R/W-0h
ADC_RATE
R/W-0h
ADC_SAMPLE_1:0
R/W-3h
ADC_AVG
R/W-0h
ADC_AVG_INIT
R/W-0h
表8-49. REG2E_ADC_Control Register Field Descriptions
Bit
Field
ADC_EN
Type
Reset
Notes
Description
7
R/W
0h
Reset by:
WATCHDOG
REG_RST
ADC Control
Type : RW
POR: 0b
0h = Disable
1h = Enable
6
ADC_RATE
R/W
0h
3h
Reset by:
REG_RST
ADC conversion rate control
Type : RW
POR: 0b
0h = Continuous conversion
1h = One shot conversion
5-4
ADC_SAMPLE_1:0 R/W
Reset by:
REG_RST
ADC sample speed
Type : RW
POR: 11b
0h = 15-bit effective resolution
1h = 14-bit effective resolution
2h = 13-bit effective resolution
3h = 12-bit effective resolution
3
2
ADC_AVG
R/W
R/W
R/W
0h
0h
0h
Reset by:
REG_RST
ADC average control
Type : RW
POR: 0b
0h = Single value
1h = Running average
ADC_AVG_INIT
RESERVED
Reset by:
REG_RST
ADC average initial value control
Type : RW
POR: 0b
0h = Start average using the existing register value
1h = Start average using a new ADC conversion
1-0
RESERVED
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8.5.1.43 REG2F_ADC_Function_Disable_0 Register (Offset = 2Fh) [reset = 0h]
REG2F_ADC_Function_Disable_0 is shown in 图8-65 and described in 表8-50.
Return to the 表8-6.
ADC Function Disable 0
图8-65. REG2F_ADC_Function_Disable_0 Register
7
6
5
4
3
2
1
0
IBUS_ADC_DIS IBAT_ADC_DIS VBUS_ADC_DI VBAT_ADC_DI VSYS_ADC_DI TS_ADC_DIS TDIE_ADC_DIS RESERVED
S
S
S
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R-0h
表8-50. REG2F_ADC_Function_Disable_0 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
6
5
4
3
2
1
0
IBUS_ADC_DIS
IBAT_ADC_DIS
VBUS_ADC_DIS
VBAT_ADC_DIS
VSYS_ADC_DIS
TS_ADC_DIS
R/W
0h
Reset by:
REG_RST
IBUS ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
R/W
R/W
R/W
R/W
R/W
R/W
R
0h
0h
0h
0h
0h
0h
0h
Reset by:
REG_RST
IBAT ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
Reset by:
REG_RST
VBUS ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
Reset by:
REG_RST
VBAT ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
Reset by:
REG_RST
VSYS ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
Reset by:
REG_RST
TS ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
TDIE_ADC_DIS
RESERVED
Reset by:
REG_RST
TDIE ADC control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
RESERVED
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8.5.1.44 REG30_ADC_Function_Disable_1 Register (Offset = 30h) [reset = 0h]
REG30_ADC_Function_Disable_1 is shown in 图8-66 and described in 表8-51.
Return to the 表8-6.
ADC Function Disable 1
图8-66. REG30_ADC_Function_Disable_1 Register
7
6
5
4
3
2
1
0
DP_ADC_DIS DM_ADC_DIS VAC2_ADC_DI VAC1_ADC_DI
RESERVED
R-0h
S
S
R/W-0h
R/W-0h
R/W-0h
R/W-0h
表8-51. REG30_ADC_Function_Disable_1 Register Field Descriptions
Bit
Field
Type
Reset
Notes
Description
7
6
DP_ADC_DIS
DM_ADC_DIS
VAC2_ADC_DIS
VAC1_ADC_DIS
RESERVED
R/W
0h
Reset by:
REG_RST
D+ ADC Control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
R/W
R/W
R/W
R
0h
0h
0h
0h
Reset by:
REG_RST
D- ADC Control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
5
Reset by:
REG_RST
VAC2 ADC Control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
4
Reset by:
REG_RST
VAC1 ADC Control
Type : RW
POR: 0b
0h = Enable (Default)
1h = Disable
3-0
RESERVED
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8.5.1.45 REG31_IBUS_ADC Register (Offset = 31h) [reset = 0h]
REG31_IBUS_ADC is shown in 图8-67 and described in 表8-52.
Return to the 表8-6.
IBUS ADC
图8-67. REG31_IBUS_ADC Register
15
7
14
6
13
5
12
IBUS_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
IBUS_ADC_15:0
R-0h
表8-52. REG31_IBUS_ADC Register Field Descriptions
Bit
15-0
Field
IBUS_ADC_15:0
Type
Reset
Description
R
0h
IBUS ADC reading
Reported in 2 's Complement.
When the current is flowing from VBUS to PMID, IBUS ADC reports
positive value, and when the current is flowing from PMID to VBUS,
IBUS ADC reports negative value.
Type : R
POR: 0 mA (0h)
Range : 0 mA-5000 mA
Fixed Offset : 0 mA
Bit Step Size : 1mA
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8.5.1.46 REG33_IBAT_ADC Register (Offset = 33h) [reset = 0h]
REG33_IBAT_ADC is shown in 图8-68 and described in 表8-53.
Return to the 表8-6.
IBAT ADC
图8-68. REG33_IBAT_ADC Register
15
7
14
6
13
5
12
IBAT_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
IBAT_ADC_15:0
R-0h
表8-53. REG33_IBAT_ADC Register Field Descriptions
Bit
15-0
Field
IBAT_ADC_15:0
Type
Reset
Description
R
0h
IBAT ADC reading
Reported in 2 's Complement.
The IBAT ADC reports positive value for the battery charging current,
and negative value for the battery discharging current.
Type : R
POR: 0 mA (0h)
Range : 0 mA-8000 mA
Fixed Offset : 0 mA
Bit Step Size : 1 mA
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8.5.1.47 REG35_VBUS_ADC Register (Offset = 35h) [reset = 0h]
REG35_VBUS_ADC is shown in 图8-69 and described in 表8-54.
Return to the 表8-6.
VBUS ADC
图8-69. REG35_VBUS_ADC Register
15
7
14
6
13
5
12
VBUS_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
VBUS_ADC_15:0
R-0h
表8-54. REG35_VBUS_ADC Register Field Descriptions
Bit
15-0
Field
VBUS_ADC_15:0
Type
Reset
Description
R
0h
VBUS ADC reading
Reported in 2 's Complement.
Type : R
POR: 0 mV (0h)
Range : 0 mV-30000 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.48 REG37_VAC1_ADC Register (Offset = 37h) [reset = 0h]
REG37_VAC1_ADC is shown in 图8-70 and described in 表8-55.
Return to the 表8-6.
VAC1 ADC
图8-70. REG37_VAC1_ADC Register
15
7
14
6
13
5
12
VAC1_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
VAC1_ADC_15:0
R-0h
表8-55. REG37_VAC1_ADC Register Field Descriptions
Bit
15-0
Field
VAC1_ADC_15:0
Type
Reset
Description
R
0h
VAC1 ADC reading
Reported in 2 's Complement.
Type : R
POR: 0 mV (0h)
Range : 0 mV-30000 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.49 REG39_VAC2_ADC Register (Offset = 39h) [reset = 0h]
REG39_VAC2_ADC is shown in 图8-71 and described in 表8-56.
Return to the 表8-6.
VAC2 ADC
图8-71. REG39_VAC2_ADC Register
15
7
14
6
13
5
12
VAC2_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
VAC2_ADC_15:0
R-0h
表8-56. REG39_VAC2_ADC Register Field Descriptions
Bit
15-0
Field
VAC2_ADC_15:0
Type
Reset
Description
R
0h
VAC2 ADC reading
Reported in 2 's Complement.
Type : R
POR: 0 mV (0h)
Range : 0 mV-30000 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.50 REG3B_VBAT_ADC Register (Offset = 3Bh) [reset = 0h]
REG3B_VBAT_ADC is shown in 图8-72 and described in 表8-57.
Return to the 表8-6.
VBAT ADC
图8-72. REG3B_VBAT_ADC Register
15
7
14
6
13
5
12
VBAT_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
VBAT_ADC_15:0
R-0h
表8-57. REG3B_VBAT_ADC Register Field Descriptions
Bit
15-0
Field
VBAT_ADC_15:0
Type
Reset
Description
R
0h
The battery differential voltage (VBATP - VBATN) ADC reading
Reported in 2 's Complement.
Type : R
POR: 0 mV (0h)
Range : 0 mV-20000 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.51 REG3D_VSYS_ADC Register (Offset = 3Dh) [reset = 0h]
REG3D_VSYS_ADC is shown in 图8-73 and described in 表8-58.
Return to the 表8-6.
VSYS ADC
图8-73. REG3D_VSYS_ADC Register
15
7
14
6
13
5
12
VSYS_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
VSYS_ADC_15:0
R-0h
表8-58. REG3D_VSYS_ADC Register Field Descriptions
Bit
15-0
Field
VSYS_ADC_15:0
Type
Reset
Description
R
0h
VSYS ADC reading
Reported in 2 's Complement.
Type : R
POR: 0 mV (0h)
Range : 0 mV-24000 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.52 REG3F_TS_ADC Register (Offset = 3Fh) [reset = 0h]
REG3F_TS_ADC is shown in 图8-74 and described in 表8-59.
Return to the 表8-6.
TS ADC
图8-74. REG3F_TS_ADC Register
15
7
14
6
13
5
12
11
10
2
9
1
8
0
TS_ADC_15:0
R-0h
4
3
TS_ADC_15:0
R-0h
表8-59. REG3F_TS_ADC Register Field Descriptions
Bit
15-0
Field
TS_ADC_15:0
Type
Reset
Description
R
0h
TS ADC reading
Type : R
POR: 0% (0h)
Range : 0%-99.9023%
Fixed Offset : 0%
Bit Step Size : 0.0976563%
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8.5.1.53 REG41_TDIE_ADC Register (Offset = 41h) [reset = 0h]
REG41_TDIE_ADC is shown in 图8-75 and described in 表8-60.
Return to the 表8-6.
TDIE_ADC
图8-75. REG41_TDIE_ADC Register
15
7
14
6
13
5
12
TDIE_ADC_15:0
R-0h
11
10
2
9
1
8
0
4
3
TDIE_ADC_15:0
R-0h
表8-60. REG41_TDIE_ADC Register Field Descriptions
Bit
15-0
Field
TDIE_ADC_15:0
Type
Reset
Description
R
0h
TDIE ADC reading
Reported in 2 's Complement.
Type : R
POR: 0°C (0h)
Range : -40°C-150°C
Fixed Offset : 0°C
Bit Step Size : 0.5°C
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8.5.1.54 REG43_D+_ADC Register (Offset = 43h) [reset = 0h]
REG43_D+_ADC is shown in 图8-76 and described in 表8-61.
Return to the 表8-6.
D+ ADC
图8-76. REG43_D+_ADC Register
15
7
14
6
13
5
12
11
10
2
9
1
8
0
D+_ADC_15:0
R-0h
4
3
D+_ADC_15:0
R-0h
表8-61. REG43_D+_ADC Register Field Descriptions
Bit
15-0
Field
D+_ADC_15:0
Type
Reset
Description
R
0h
D+ ADC reading
Type : R
POR: 0 mV (0h)
Range : 0 mV-3600 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.55 REG45_D-_ADC Register (Offset = 45h) [reset = 0h]
REG45_D-_ADC is shown in 图8-77 and described in 表8-62.
Return to the 表8-6.
D- ADC
图8-77. REG45_D-_ADC Register
15
7
14
6
13
5
12
11
10
2
9
1
8
0
D-_ADC_15:0
R-0h
4
3
D-_ADC_15:0
R-0h
表8-62. REG45_D-_ADC Register Field Descriptions
Bit
15-0
Field
D-_ADC_15:0
Type
Reset
Description
R
0h
D- ADC reading
Type : R
POR: 0 mV (0h)
Range : 0 mV-3600 mV
Fixed Offset : 0 mV
Bit Step Size : 1 mV
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8.5.1.56 REG47_DPDM_Driver Register (Offset = 47h) [reset = 0h]
REG47_DPDM_Driver is shown in 图8-78 and described in 表8-63.
Return to the 表8-6.
DPDM Driver
图8-78. REG47_DPDM_Driver Register
7
6
5
4
3
2
1
0
RESERVED
R/W-0h
DPLUS_DAC_2:0
R/W-0h
DMINUS_DAC_2:0
R/W-0h
表8-63. REG47_DPDM_Driver Register Field Descriptions
Bit
Field
Type
Reset
Description
7-5
4-2
1-0
DPLUS_DAC_2:0
R/W
0h
D+ Output Driver
Type : RW
POR: 000b
0h = HIZ
1h = 0
2h = 0.6 V
3h = 1.2 V
4h = 2.0 V
5h = 2.7 V
6h = 3.3 V
7h = D+/D- Short
DMINUS_DAC_2:0
R/W
0h
D- Output Driver
Type : RW
POR: 000b
0h = HIZ
1h = 0
2h = 0.6 V
3h = 1.2 V
4h = 2.0 V
5h = 2.7 V
6h = 3.3 V
7h = Reserved
RESERVED
R/W
0h
RESERVED
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8.5.1.57 REG48_Part_Information Register (Offset = 48h) [reset = 0h]
REG48_Part_Information is shown in 图8-79 and described in 表8-64.
Return to the 表8-6.
Part Information
图8-79. REG48_Part_Information Register
7
6
5
4
3
2
1
0
RESERVED
R-0h
PN_2:0
R-0h
DEV_REV_2:0
R-0h
表8-64. REG48_Part_Information Register Field Descriptions
Bit
Field
Type
Reset
Description
7-6
5-3
RESERVED
PN_2:0
R
0h
RESERVED
R
0h
Device Part number 0h = BQ24179. All the other options are
reserved Type : R POR: 000b
2-0
DEV_REV_2:0
R
0h
Device Revision
Type : R
POR: 001b
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9 Application and Implementation
Note
Information in the following applications sections is not part of the TI component specification, and TI
does not warrant its accuracy or completeness. TI’s customers are responsible for determining
suitability of components for their purposes, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
A typical application consists of the device configured as an I2C controlled device and a multi-cell battery charger
for Li-Ion and Li-polymer batteries. It integrates the four switching MOSFETs (Q1 to Q4) for the buck-boost
converter, and the battery FET (BATFET) between system and battery. The device also integrates the input
current sensing and charging current sensing circuitries, the bootstrap diode for the high-side gate driving and
the dual-input power mux for the power sources selection.
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9.2 Typical Application
Optional
1 × 0.1 µF
and
2 × 10 µF
VIN2
0.1 µF
ACDRV2
VAC2
PMID
VBUS
VIN1
0.1 µF
1 × 0.1 µF and 3 × 10 µF
ACDRV1
VAC1
REGN
6.04 k
PROG
ILIM_HIZ
GND
127 k
D+
D-
USB
100 k
BTST1
47 nF
Q1
SW1
REGN
1.0 µH
Q2
4.7 µF
SYSTEM
LOAD
Q4
SYS
2.5V to 19.4V
SW2
47 nF
1 × 0.1 µF and 5 × 10 µF
Q3
BTST2
STAT
BATFET
REGN
Optional
BAT
2.2 k
SDRV
CE
100
2 × 10 µF
BQ24179
PG
BATP
TS
REGN
SDA
SCL
INT
5.24 k
10 k
Host
30.31 k
QON
IBAT
BATN
100
图9-1. BQ24179 Application Diagram with Two Input Sources and Ship FET
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1 × 0.1 µF
and
ACDRV2
VAC2
2 × 10 µF
PMID
VBUS
VIN1
1 × 0.1 µF and 3 × 10 µF
0.1 µF
ACDRV1
VAC1
REGN
6.04 k
PROG
ILIM_HIZ
GND
127 k
100 k
D+
D-
USB
BTST1
47 nF
Q1
SW1
REGN
1.0 µH
4.7 µF
Q2
SYSTEM
LOAD
Q4
SYS
2.5V to 19.4V
SW2
47 nF
1 × 0.1 µF and 5 × 10 µF
Q3
BTST2
STAT
BATFET
REGN
BAT
SDRV
2.2 k
1 nF
CE
100
2 × 10 µF
PG
BATP
TS
BQ24179
REGN
SDA
SCL
INT
5.24 k
Host
10 k
30.31 k
QON
IBAT
BATN
100
图9-2. BQ24179 Application Diagram with Single Input Source and No Ship FET
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9.2.1 Design Requirements
For this design example, use the parameters shown in the table below.
表9-1. Design Parameters
PARAMETER
VALUE
5 V to 20 V
3.0 A
VBUS voltage range
Input current limit (IINDPM[8:0])
Fast charge current limit (ICHG[8:0])
Battery regulation voltage (VREG[10:0])
3.0 A
8.4 V
9.2.2 Detailed Design Procedure
9.2.2.1 Inductor Selection
The device has 1.5-MHz switching frequency to allow the use of small inductor (1 µH) and capacitor values. It
also provide the 750-kHz switching frequency to achieve higher efficiency for the applications which have
enough design space to accommodate the larger inductor (2.2 µH) and capacitors. Please note that the 1.5-MHz
switching frequency only works with the 1-µH inductor and the 750-kHz switching frequency only works with the
2.2-µH inductor.
Because the converter might be either operated in the buck mode or the boost mode, so the inductor current is
equal to either the charging current or the input current. The inductor saturation current should be higher than
the larger value of the input current (IIN) or the charging current (ICHG) plus half the ripple current (IRIPPLE):
(3)
The inductor ripple current (IRIPPLE) depends on the input voltage (VBUS), the output voltage (VSYS), the switching
frequency (FSW) and the inductance (L). The inductor current ripples for buck mode and boost mode are
calculated with equations (4) and (5), respectively:
(4)
(5)
The inductor current ripple in the buck mode is usually larger than that in the boost mode, since the voltage-
second applied on the inductor is larger. The maximum inductor current ripple in the buck mode happens in the
vicinity of D = VSYS / VBUS = 0.5. The SYS voltage is approximately 8 V for the 2s battery configuration, so the
worst case for the inductor ripples is with the 15-V or 20-V input voltage.
9.2.2.2 Input (VBUS / PMID) Capacitor
In the buck mode operation, the input current is discontinuous, which dominates the input RMS ripple current
and input voltage ripple. The input capacitors should have enough ripple current rating to absorb the input AC
current and have large enough capacitance to maintain the small input voltage ripple. For the buck mode
operation, the input RMS ripple current is calculated by the equation (6) and the input voltage ripple is calculated
by the equation (7), where D = VSYS / VBUS
.
(6)
(7)
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The worst case input RMS ripple current and input voltage ripple both occur at 0.5 duty cycle condition. The SYS
voltage is approximately 8V for the 2s battery configuration, so the worst case is when 15-V to 20-V VBUS
condition. Low ESR ceramic capacitor such as X7R or X5R is preferred for the input decoupling capacitor and
should be placed close to the PMID and GND pins of the IC. The voltage rating of the capacitor must be higher
than the normal input voltage level. The capacitor with 25-V or higher voltage rating is preferred for up to 20-V
input voltage. 1*0.1-μF + 3*10-μF ceramic capacitors are suggested for up to 3.3-A input current limit to
support the converter in forward mode.
9.2.2.3 Output (VSYS) Capacitor
In the boost mode operation, the output current is discontinuous, which dominates the output RMS ripple current
and output voltage ripple. The output capacitors should have enough ripple current rating to absorb the output
AC current and have large enough capacitance to maintain the small output voltage ripple. For the boost mode
operation, the output RMS ripple current is calculated by the equation (8) and the output voltage ripple is
calculated by the equation (9), where D = (1 - VBUS / VSYS).
(8)
(9)
The worst case output RMS ripple current and output voltage ripple both occur at the lowest VBUS input voltage.
The SYS voltage is approximately 8 V for the 2s battery configuration, so the worst case is 5-V VBUS condition.
Low ESR ceramic capacitor such as X7R or X5R is preferred for the output decoupling capacitor and should be
placed close to the SYS and GND pins of the IC. The voltage rating of the capacitor must be higher than the
normal input voltage level. The capacitor with 16-V or higher voltage rating is preferred for the 2s battery
configuration. 1*0.1-μF + 5*10-μF capacitors are suggested for up to 5-A charging current.
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9.2.3 Application Curves
CVBUS = 2*10 µF, CPMID= 3*10 µF, CSYS = 5*10 µF, CBAT = 2*10 µF, L1 = 1 µH (SPM6530T-1R0M120), Fsw = 1.5
MHz.
VAC1 = VBUS = 5 V
VBAT = 8 V
VAC1 = VBUS = 5 V
VBAT = 8 V
图9-3. ACFET1-RBFET1 Turns on at Power Up
图9-4. Power Up from VAC1 with Charge Enabled
VBUS = 5 V
VBAT = 8 V
ICHG = 1 A
VBUS = 5 V
VBAT = 8 V
ICHG = 1 A
图9-5. Charge Enable
图9-6. Charge Disable
VBUS = 5 V
VBAT = 8 V
ICHG = 1 A
VBUS = 8 V
VBAT = 8 V
ICHG = 1 A
图9-7. Boost Charging Mode PWM Operation
图9-8. Buck-Boost Charging Mode PWM Operation
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VBUS = 15 V
VBAT = 8 V
ICHG = 0 A
VBUS = 15 V
VBAT = 8 V
ICHG = 1.5 A
图9-10. Buck Mode PFM with OOA
图9-9. Buck Charging Mode PWM Operation
VBUS = 15 V
VBAT = 8 V
Charge disabled
VBUS = 15 V
VBAT = 8 V
ICHG = 0 A
图9-12. VSYS Load Transient Response
图9-11. Buck Mode PFM without OOA
VBUS = 5 V
VBAT = 8 V
Charge enabled
图9-13. IINDPM Transient Response
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10 Power Supply Recommendations
In order to provide an output voltage on SYS, the device requires a power supply between 3.6-V and 24-V input
with recommended > 500-mA current rating connected to VBUS or a 1s to 4s Li-Ion battery with voltage higher
than VBAT_UVLO connected to BAT. The source current rating needs to be at least 3 A for the buck-boost
converter of the charger to provide maximum output power to SYS.
The charger does not support the testing condition when the battery connection is floating. The BAT pin has to
be connected to a real battery or some devices which can emulate the battery, like the battery emulator or bulk
capacitors. When the BAT pin is floating, please disable charge by setting EN_CHG to 0 or pulling low the EC
pin. Otherwise, the voltage overshoot at SYS might trigger the SYSOVP protection periodically.
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11 Layout
11.1 Layout Guidelines
The switching nodes rising and falling times should be minimized for minimum switching loss. Proper layout of
the components to minimize the high frequency current path loops (shown in the figure below) is important to
prevent the electrical and magnetic field radiation and the high frequency resonant problems. Here is a PCB
layout priority list for proper layout. Layout PCB according to this specific order is essential.
1. Place the SYS output capacitors as close to SYS and GND as possible. Place a 0.1-µF small size (such as
0402 or 0201) capacitor closer than the other 10-µF capacitors. Ground connections need to be tied to the
IC ground with a short copper trace connection or GND plane.
2. Place the PMID input capacitors as close to PMID and GND as possible. Place a 0.1-µF small size (such as
0402 or 0201) capacitor closer than the other 10-µF capacitors. Ground connections need to be tied to the
IC ground with a short copper trace connection or GND plane.
3. Place the VBUS input capacitors as close to VBUS and GND as possible. Place a 0.1-µF small size (such as
0402 or 0201) capacitor closer than the other 10-µF capacitors. Ground connections need to be tied to the
IC ground with a short copper trace connection or GND plane.
4. The connection from SYS/PMID/VBUS to the 0.1 µF has to be routed on the top layer of the PCB, the
returning back to GND also has to be in the top layer. Keep the whole routing loop as small as possible.
5. Place the inductor input terminal to SW1 and the inductor output terminal to SW2 as close as possible.
Minimize the copper area of this trace to lower electrical and magnetic field radiation but make the trace wide
enough to carry the inductor current. Minimize parasitic capacitance from this area to any other trace or
plane.
6. Place the BAT capacitors close to BAT and GND, place the VBUS capacitors close to VBUS and GND.
7. The REGN decoupling capacitor and the bootstrap capacitors should be placed next to the IC and make
trace connection as short as possible.
8. Ensure that there are sufficient thermal vias directly under the power MOSFETs, connecting to copper on
other layers.
9. Via size and number should be enough for a given current path.
10. Route BATP and BATN away from switching nodes such as SW1 and SW2.
+
+
œ
图11-1. Buck-Boost Converter High Frequency Current Path
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11.2 Layout Example
GND
GND
GND
BTST
PMID
SW
PMID
PMID
/PG
GND
GND
/INT
ILIM
TS
SW
SYS
BAT
SW
SYS
VBUS
VBUS
VBUS
SYS
BAT
D+
BAT
REG
N
D-
SCL
BTST
BATP
/CE
SDA
BATN
GND
REGN
图11-2. PCB Layout Example
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12 Device and Documentation Support
12.1 Device Support
12.1.1 第三方产品免责声明
TI 发布的与第三方产品或服务有关的信息,不能构成与此类产品或服务或保修的适用性有关的认可,不能构成此
类产品或服务单独或与任何TI 产品或服务一起的表示或认可。
12.2 Documentation Support
12.2.1 Related Documentation
For related documentation see the following:
• BQ25790EVM (BMS027) Evaluation Module User's Guide
12.3 接收文档更新通知
要接收文档更新通知,请导航至 ti.com 上的器件产品文件夹。点击订阅更新 进行注册,即可每周接收产品信息更
改摘要。有关更改的详细信息,请查看任何已修订文档中包含的修订历史记录。
12.4 支持资源
TI E2E™ 支持论坛是工程师的重要参考资料,可直接从专家获得快速、经过验证的解答和设计帮助。搜索现有解
答或提出自己的问题可获得所需的快速设计帮助。
链接的内容由各个贡献者“按原样”提供。这些内容并不构成 TI 技术规范,并且不一定反映 TI 的观点;请参阅
TI 的《使用条款》。
12.5 Trademarks
TI E2E™ is a trademark of Texas Instruments.
所有商标均为其各自所有者的财产。
12.6 静电放电警告
静电放电(ESD) 会损坏这个集成电路。德州仪器(TI) 建议通过适当的预防措施处理所有集成电路。如果不遵守正确的处理
和安装程序,可能会损坏集成电路。
ESD 的损坏小至导致微小的性能降级,大至整个器件故障。精密的集成电路可能更容易受到损坏,这是因为非常细微的参
数更改都可能会导致器件与其发布的规格不相符。
12.7 术语表
TI 术语表
本术语表列出并解释了术语、首字母缩略词和定义。
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13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
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8-Jun-2021
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
BQ24179YBGR
ACTIVE
DSBGA
YBG
56
3000 RoHS & Green
SNAGCU
Level-1-260C-UNLIM
-40 to 85
BQ24179
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE OUTLINE
YBG0056
DSBGA - 0.5 mm max height
SCALE 4.000
DIE SIZE BALL GRID ARRAY
A
B
E
BALL A1
CORNER
D
C
0.5 MAX
SEATING PLANE
0.05 C
0.20
0.14
BALL TYP
2.4 TYP
SYMM
H
G
F
E
D
C
2.8
TYP
SYMM
D: Max = 3.307 mm, Min =3.247 mm
E: Max = 2.888 mm, Min =2.827 mm
B
A
0.4 TYP
0.27
1
3
4
5
6
7
2
56X
0.23
0.015
C A B
0.4 TYP
4225513/A 11/2019
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
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EXAMPLE BOARD LAYOUT
YBG0056
DSBGA - 0.5 mm max height
DIE SIZE BALL GRID ARRAY
(0.4) TYP
3
56X ( 0.23)
1
4
5
6
7
2
A
(0.4) TYP
B
C
D
E
F
SYMM
G
H
SYMM
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 25X
0.05 MIN
0.05 MAX
METAL UNDER
SOLDER MASK
(
0.23)
METAL
(
0.23)
EXPOSED
METAL
SOLDER MASK
OPENING
EXPOSED
METAL
SOLDER MASK
OPENING
SOLDER MASK
DEFINED
NON-SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK DETAILS
NOT TO SCALE
4225513/A 11/2019
NOTES: (continued)
3. Final dimensions may vary due to manufacturing tolerance considerations and also routing constraints.
See Texas Instruments Literature No. SNVA009 (www.ti.com/lit/snva009).
www.ti.com
EXAMPLE STENCIL DESIGN
YBG0056
DSBGA - 0.5 mm max height
DIE SIZE BALL GRID ARRAY
(0.4) TYP
3
(R0.05) TYP
56X ( 0.25)
(0.4) TYP
1
4
5
6
7
2
A
B
C
METAL
TYP
D
E
F
SYMM
G
H
SYMM
SOLDER PASTE EXAMPLE
BASED ON 0.1 mm THICK STENCIL
SCALE: 25X
4225513/A 11/2019
NOTES: (continued)
4. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release.
www.ti.com
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