LC709204FXE-01TBG_技术文档

DATA SHEET

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Battery Fuel Gauge LSI

[Smart LiB Gauge] for

1-Cell Lithium-ion/ Polymer

(Li+) with Low Power 2ꢀmA

Operation

WLCSP12 1.48x1.91x0.51

CASE 567XE

MARKING DIAGRAM

LC709204F

Overview

204**

LC709204F is a Fuel Gauge for 1−Cell Lithium−ion/Polymer

batteries. It is part of our Smart LiB Gauge family of Fuel Gauges

which measure the battery RSOC (Relative State Of Charge) using its

unique algorithm called HG−CVR2. The HG−CVR2 algorithm

provides accurate RSOC information even under unstable conditions

(e.g. changes of battery; temperature, loading, aging and

self−discharge). An accurate RSOC contributes to the operating time

of portable devices. The Fuel Gauge (in other words, Gas Gauge,

Battery Monitor or Battery Gauge) feature of HG−CVR2 algorithm

makes LSI highly applicable in various application. The LSI can

immediately start battery measurement by setting a few parameters

after battery insertion. Learning cycles that make complicated

manufacturing process of applications can be avoided.

AWLYW

204** = 20401 (LC709204FXE−01TBG)

A

WL

YW

= Assembly Site

= Wafer Lot Number

= Assembly Start Week

ORDERING INFORMATION

See detailed ordering and shipping information on page 20 of

this data sheet.

The LSI also supports battery safety by alarm functions and SOH

(State of Health) reporting to the application processor. The operating

consumption current is very low 2 mA and it is suitable for applications

such as wearables and 1 series N parallel batteries.

Features

Applications

• HG−CVR2 Algorithm Technology

♦ Small Footprint: No Need for Current Sensing Resistor

♦ Accurate RSOC of Aging Battery

• Wearables / IoT Devices

• Smartphones/PDA Devices

• Digital Cameras

• Portable Game Players

• USB-related Devices

♦ Stable Gauging by Automatic Convergence of Error

♦ Immediate Accurate Gauging after Battery Insertion

♦ Eliminates Learning Cycle

• Low Power Consumption

♦ 2 mA Operational Mode Current

• Improvement of the Battery Safety by Alarm Function

RSOC / Voltage / Temperature

• Battery Lifetime Measurement

SOH / Cycle Count / Operating Time

• Remaining Time Estimation

Time to Full / Time to Empty

• Three Temperature Inputs

♦ Inputs to sense two NTC Thermistors

2

♦ Via I C

• Detection of Battery Operating Conditions

Charging / Discharging

• Detection of Battery Insertion

2

• I C Interface (supported up to 400 kHz)

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

1

Publication Order Number:

May, 2023 − Rev. 1

LC709204F/D

LC709204F

Application Circuit Example

Application

Battery Pack

PACK+

1uF

SCL

T

Application

processor

TSENSE1

SDA

LC709204F

ALARMB

REG

2.2uF

PACK-

Figure 1. Example of an Application Schematic using LC709204F

(The temperature is measured using TSENSE1 pin.)

Application

Battery Pack

PACK+

1uF

SCL

T

Application

processor

TSENSE1

SDA

LC709204F

ALARMB

REG

2.2uF

Thermistor-sense

PACK-

Figure 2. Example of an Application Schematic using LC709204F

(The Temperature is sent via I²C.)

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2

LC709204F

VDD

Regulator

REG

DRV

SCL

I²C

Interface

SDA

ALARMB

Look up table for

internal battery

impedance & OCV

Processing

unit

TSENSE1

TSENSE2

ADC

Timer

TEST1

TEST2

VSS

Internal

Thermistor

Power on reset

Figure 3. Block Diagram

ALARMB

C1

TEST1

C2

NF1

C3

NF2

C4

TSENSE1

B4

SCL

B1

TSENSE2

B3

TEST2

B2

SDA

A1

VSS

A2

REG

A3

VDD

A4

(Bottom View)

Figure 4. Pin Assignment

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3

LC709204F

Table 1. PIN FUNCTION

WLCSP12

Name

SDA

I/O

Description

2

A1

B1

C1

I/O I C Data pin (open drain). Pull−up must be done externally.

2

SCL

I/O I C Clock pin (open drain). Pull−up must be done externally.

ALARMB

O

This pin indicates alarm by low output (open drain). Pull−up must be done externally.

Keep this pin OPEN when not in use.

A2

B2

C2

A3

B3

V

−

I

Connect this pin to the battery’s negative (−) pin.

Regulator output. Connect this pin to the capacitor.

SS

TEST2

TEST1

REG

I

O

TSENSE2

I/O Sense input and power supply for a thermistor. Connect 10 kW NTC thermistor to measure “Ambient

temperature (0x30)”. Keep this pin OPEN when not in use.

C3

A4

B4

NF1

VDD

−

No function pin. Keep this pin OPEN. Short−pin with TSENSE2 is permitted to pull out it.

Connect this pin to the battery’s positive (+) pin.

TSENSE1

I/O Sense input and power supply for a thermistor. Connect 10 kW NTC thermistor to measure “Cell

temperature (0x08)”. Keep this pin OPEN when not in use.

C4

NF2

−

No function pin. Keep this pin OPEN.

Table 2. ABSOLUTE MAXIMUM RATINGS (T = 25°C, V = 0 V)

A

SS

Specification

Min

−0.3

Typ

−

Max

+6.5

Parameter

Maximum Supply Voltage

Input Voltage

Symbol

max

Pin/Remarks

Conditions

V

(V)

Unit

DD

V

VDD

−

V

DD

V (1)

I

ALARMB, SDA,

SCL, NF1, NF2

−

Output Voltage

V (1)

REG,

TSENSE1,

TSENSE2

−

−0.3

−

+4.6

150

o

Allowable Power Dissipation

P

d max

T = −40 to

−

mW

A

+85_C

Operating Ambient Temperature

Storage Ambient Temperature

T

−

−40

−

+85

_C

aopr

T

−40

+125

stg

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

Table 3. ALLOWABLE OPERATING CONDITIONS (T = −40 to +85°C, V = 0 V)

A

SS

Specification

Min

Typ

Max

Parameter

Symbol

(1)

Pin/Remarks

Conditions

V

(V)

Unit

DD

Operating Supply Voltage

V

VDD

−

2.5

−

5.0

V

DD

Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond

the Recommended Operating Ranges limits may affect device reliability.

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LC709204F

Table 4. ELECTRICAL CHARACTERISTICS (T = −40 to +85°C, V = 0 V, Typ: 4 V, T = 25°C)

A

SS

A

Specification

Typ

Pin/

Remarks

V

[V]

Min

Max

Parameter

Symbol

Conditions

Unit

V

DD

LDO

LDO Output Voltage

CONSUMPTION CURRENT

V

REG

VDD

2.5 to 5.0

2.3

2.7

2

3.0

Operational Mode

I

(1)

Ta = −20_C to +70_C

Average current with 0.01C

Constant discharge.

μA

DD

Sleep Mode

I

(2)

Ta = −20_C to +70_C

2.5 to 5.0

1.3

DD

INPUT / OUTPUT

High Level Input

Voltage

V

ALARMB,

SDA, SCL

2.5 to 5.0

1.4

5.5

0.5

1

V

IH

Low Level Input

Voltage

V

ALARMB,

SDA, SCL

IL

High Level Input

Current

I

IH

ALARMB,

SDA, SCL, (including output transistor

NF1, NF2 off leakage current)

V

IN

= V

DD

mA

Low Level Input

Current

I

IL

ALARMB,

SDA, SCL, (including output transistor

NF1, NF2 off leakage current)

V

= V

SS

2.5 to 5.0

−1

IN

Low Level Output

Voltage

V

(1)

(2)

ALARMB,

SDA, SCL

I

= 3.0 mA

= 1.3 mA

3.3 to 5.0

2.5 to 5.0

0.4

V

OL

Hysteresis Voltage

VHYS

ALARMB,

SDA, SCL

0.2

10

Pull−up Resistor

Resistance

Rpu

TSENSE1,

TSENSE2

2.5 to 5.0

kΩ

Pull−up Resistor

Temperature

Coefficient

Rpuc

TSENSE1, Ta = −20_C to +70_C

TSENSE2

−0.05

＋0.05

%/_C

POWER ON RESET

Reset Release Voltage

V

VDD

2.4

90

V

RR

Initialization Time after

Reset Release

T

INIT

2.4 to 5.0

2.5 to 5.0

ms

TIMER

Time Measurement

Accuracy

T

ME

Ta = 25_C

−1

+1

%

BATTERY VOLTAGE

Voltage Measurement

Accuracy

V

(1)

(2)

VDD

4

+7.5

+20

mV/cell

Ta = +25_C

−7.5

−20

ME

V

ME

Ta = −20_C to +70_C

2.5 to 5.0

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

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LC709204F

Table 5. I²C SLAVE CHARACTERISTICS (T = −40 to +85°C, V = 0 V)

A

SS

Specification

Min

−

Max

Parameter

Clock Frequency

Symbol

Pin/Remarks

SCL

Conditions

V

(V)

Unit

kHz

ms

DD

T

400

SCL

BUF

Bus Free Time between STOP Condition

and START Condition

T

SCL, SDA

(See Figure 5)

1.3

−

Hold Time (Repeated) START Condition.

First Clock Pulse is Generated after this

Interval

T

SCL, SDA

0.6

−

ms

HD:STA

Repeated START Condition Setup Time

STOP Condition Setup Time

Data Hold Time

SCL, SDA

SCL

(See Figure 5)

(See Figure 6)

0.6

0

−

ms

ns

ms

s

SU:STA

SU:STO

HD:DAT

2.5 to 5.0

T

−

Data Setup Time

T

100

1.3

0.6

12

−

SU:DAT

Clock Low Period

T

−

LOW

HIGH

Clock High Period

T

SCL

−

Time-out Interval (Notes 1, 2)

T

TMO

SCL, SDA

14

2

1. This LSI resets I C communication if the communication takes more than T

. It initializes an internal timer to measure the interval when

TMO

it detects ninth clock pulse. It can receive a new START condition after the reset.

2. This LSI may lose I C communication at this reset operation. Then if a master can’t receive a response it must restart transaction from START

condition.

2

T_BUF

SDA

T_HD;STA

T_SU;STO

T_HD;DAT

T_SU;STA

T_HIGH

T_SU;DAT

T_LOW

SCL

P

S

P

Figure 5. I²C Timing Diagram

SDA

SCL

T_TMO

2

1

8

9

1

2

8

9

ACK

S

Figure 6. I²C Time-out Interval

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LC709204F

I²C Communication Protocol

2

Communication protocol type: I C

Frequency: Supported up to 400 kHz

Slave Address: 0001011 (The first 8−bits after the Strat Condition is 0x16 (WRITE) or 0x17 (READ).)

This LSI will stretch the clock.

Bus Protocols

S

Sr

Rd

Wr

A

:

Start Condition

Repeated Start Condition

Read (bit value of 1)

Write (bit value of 0)

ACK (bit value of 0)

NACK (bit value of 1)

Stop Condition

Slave Address to Last Data (CRC−8−ATM : ex.3778 mV : 0x16, 0x09, 0x17, 0xC2, 0x0E → 0x86)

Master-to-Slave

Slave-to-Master

Continuation of protocol

N

P

CRC−8

…

S

Sr

A

Slave Address

CRC−8

Wr

Rd

N

A

P

Command Code

Data Byte Low

A

Data Byte High

* When you do not read CRC−8, LSI data is not reliable. CRC−8−ATM ex: (5 bytes) 0x16, 0x09, 0x17, 0xC2,

0x0E → 0x86

Figure 7. Read Word Protocol

S

Slave Address

Wr

A

Command Code

A

Data Byte Low

A

Data Byte High

A

CRC−8

A

P

* When you do not add CRC−8, the Written data (Data byte Low/High) become invalid.

CRC−8−ATM ex: (4 bytes) 0x16, 0x09, 0x55, 0xAA → 0x3B

Figure 8. Write Word Protocol

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LC709204F

Table 6. FUNCTION OF REGISTERS

Command

Initial

Value

Code

0x00, 0x01

0x03

Register Name

R/W

Range

Unit

Description

No Function

−

Registers that the access is prohibited

−

TimeToEmpty

Before RSOC

R

0x0000 to 0xFFFF

minutes

Displays estimated time to

empty.

0xFFFF

st

0x04

W

0xAA55: 1 sampling

Optional Command, especially for

obtaining the voltage with intentional timing

after power on reset, see Figure 9.

−

nd

0xAA56: 2 sampling

rd

0xAA57: 3 sampling

th

0xAA58: 4 sampling

0x05

0x06

TimeToFull

R

0x0000 to 0xFFFF

minutes

K

Displays estimated time to full.

0xFFFF

TSENSE1 Thermistor B

R/W

Sets B−constant of the

TSENSE1 thermistor.

0x0D34

(3380K)

0x07

0x08

Initial RSOC

W

0xAA55: Initialize RSOC

Initialize RSOC with current voltage when

0xAA55 is set.

−

Cell Temperature

(TSENSE1)

R

0x0980 to 0x0DCC

(−30℃ to 80℃)

0.1K

Displays Cell Temperature.

0x0BA6

(25℃)

(0.0℃ =

0x0AAC)

2

W

Sets Cell Temperature in I C

mode.

0x09

0x0A

Cell Voltage

R

0x09C4 to 0x1388

(2.5 V to 5 V)

mV

Displays Cell Voltage.

−

Current Direction

R/W

0x0000: Auto mode

0x0001: Charge mode

0xFFFF: Discharge mode

Selects Auto/Charge/Discharge mode.

0x0000

0x0B

0x0C

APA

R/W

0x0000 to 0xFFFF

Sets Adjustment parameter.

−

0x001E

−

(Adjustment Pack

Application)

APT

Sets a value to adjust temperature

measurement delay timing.

(Adjustment Pack

Thermistor)

0x0D

0x0E

RSOC

R/W

0x0000 to 0x0064

(0% to 100%)

%

K

Displays RSOC value based

on a 0−100 scale

TSENSE2 Thermistor B

0x0000 to 0xFFFF

Sets B−constant of the

TSENSE2 thermistor.

0x0D34

(3380K)

0x0F

ITE (Indicator to Empty)

IC Version

R

0x0000 to 0x03E8

(0.0% to 100.0%)

0.1%

Displays RSOC value based

−

on a 0−1000 scale

0x11

0x12

R

0x0000 to 0xFFFF

Displays an internal management code.

Selects a battery profile.

−

Change Of The

Parameter

R/W

0x0000 to 0x0004

0x0000

0x13

Alarm Low RSOC

R/W

0x0000: Disable

0x0001 to 0x0064:

Threshold

%

Sets RSOC threshold to

generate Alarm signal.

0x0000

(1% to 100%)

0x14

0x15

0x16

Alarm Low Cell Voltage

IC Power Mode

Status Bit

R/W

0x0000: Disable

0x09C4 to 0x1388:

Threshold (2.5 V to 5 V)

mV

Sets Voltage threshold to

generate Low Cell Voltage

Alarm signal.

0x0000

0x0002

0x0000

0x0001: Operational

mode

0x0002: Sleep mode

Selects Power mode.

0x0000 to 0x0003

BIT0: Controls TSENSE1 thermistor

BIT1: Controls TSENSE2 thermistor

0x17

0x19

Cycle Count

R

0x0000 to 0xFFFF

count

Displays cycle count.

0x0000

0x00C0

Battery Status

R/W

Displays various kinds of alarm and

estimated state of the battery.

0x1A

Number of the

Parameter

R

0x0000 to 0xFFFF

Displays Battery profile code.

−

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LC709204F

Table 6. FUNCTION OF REGISTERS (continued)

Command

Code

Initial

Value

Register Name

R/W

Range

Unit

Description

0x1C

Termination Current

Rate

R/W

0x0002 to 0x001E:

0.01C

Sets termination current rate.

0x0002

Threshold

(0.02C to 0.3C)

0x1D

Empty Cell Voltage

R/W

0x0000: Disable

mV

Sets empty cell voltage.

0x0000

0x09C4 to 0x1388:

Threshold

(2.5 V to 5 V)

0x1E

0x1F

ITE Offset

R/W

0x0000 to 0x03E8

(0.0% to 100.0%)

0.1%

mV

Sets ITE so that RSOC is 0%.

0x0000

Alarm High Cell Voltage

0x0000: Disable

0x09C4 to 0x1388:

Threshold (2.5 V to 5 V)

Sets Voltage threshold to

generate High Cell Voltage

Alarm signal.

0x20

0x21

Alarm Low Temperature

R/W

0x0000: Disable

0x0980 to 0x0DCC:

Threshold (−30_C to 80_C)

0.1K

(0.0℃ =

0x0AAC)

Sets Voltage threshold to

generate Low Temperature

alarm signal.

0x0000

Alarm High

Temperature

0x0000: Disable

0x0980 to 0x0DCC:

Threshold (−30_C to 80_C)

0.1K

(0.0℃ =

0x0AAC)

Sets Voltage threshold to

generate High Temperature

alarm signal.

0x25, 0x24

Total Run Time

0x00000000 to

0x00FFFFFF

minutes

Displays operating time.

0x24: Lower 16bits

0x25: Higher 8bits

0x27, 0x26

0x29, 0x28

Accumulated

Temperature

R/W

0x00000000 to

0xFFFFFFFF

0x26: Lower 16bits

0x27: Higher 16bits

2K

minutes

Displays accumulated temper-

0x0000

ature.

Accumulated RSOC

0x00000000 to

0xFFFFFFFF

0x28: Lower 16bits

0x29: Higher 16bits

%

minutes

Displays accumulated RSOC.

0x2A

0x2B

0x2C

Maximum Cell Voltage

Minimum Cell Voltage

R/W

0x09C4 to 0x1388

(2.5V to 5V)

mV

Displays the maximum

historical Cell Voltage.

0x09C4 to 0x1388

(2.5V to 5V)

Displays the minimum

historical Cell Voltage.

0x1388

(5V)

Maximum Cell

Temperature

(TSENSE1)

0x0980 to 0x0DCC

(−30℃ to 80℃)

0.1K

(0.0℃ =

0x0AAC)

Displays the historical

maximum temperature of

TSENSE1.

0x0980

(−30℃)

0x2D

0x30

Minimum Cell

Temperature

(TSENSE1)

R/W

R

0x0980 to 0x0DCC

0.1K

(0.0℃ =

0x0AAC)

Displays the historical

minimum temperature of

TSENSE1.

0x0DCC

(80℃)

(−30℃ to 80℃)

Ambient Temperature

(TSENSE2)

0x0980 to 0x0DCC

(−30℃ to 80℃)

0.1K

(0.0℃ =

0x0AAC)

Displays Ambient

Temperature.

0x0BA6

(25℃)

0x32

State of Health

User ID

R

0x0000 to 0x0064

%

Displays State of Health of

0x0064

(100%)

a battery on a 0−100 scale

0x37, 0x36

0x00000000 to

0xFFFFFFFF

Displays 32bits User ID.

(Note 3)

0x36: Lower 16bits

0x37: Higher 16bits

More than

0x40

No Function

−

Registers that the access is prohibited.

−

0xXXXX = Hexadecimal notation

3. The initial value of User ID is set on IC at ID Writing process. Please refer to an application note about how to write.

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LC709204F

TimeToEmpty (0x03)

TSENSE1 Thermistor B (0x06)

This register contains estimated time to empty in minutes.

The empty is defined as the state that RSOC(0x0D) is 0%.

Sets B-constant of the thermistor which is connected to

TSENSE1. Refer to the specification sheet of the thermistor

for the set value to use.

Before RSOC (0x04)

This command is the optional Command, used especially

for obtaining the voltage with intentional timing after power

on reset. Generally the LSI will get initial RSOC by Open

Circuit Voltage (OCV) of a battery. It is desirable for battery

current to be less than 0.025C to get expected OCV. (i.e. less

than 75 mA for 3000 mAh design capacity battery.) The LSI

initializes RSOC by measured battery voltage in initial

sequence. But if reported RSOC after reset release is not

expected value, “Before RSOC” command or “Initial

RSOC” command can initialize RSOC again.

Initial RSOC (0x07)

The LSI can be forced to initialize RSOC by sending the

Before RSOC Command (0×04 = AA55) or the Initial

RSOC Command (0×07 = AA55).

The LSI initializes RSOC by the measured voltage at that

time when the Initial RSOC command is written. (See

Figure 10). The maximum time to initialize RSOC after the

command is written is 1.5 ms.

The LSI samples battery voltage four times during initial

sequence. The sampling interval is around 10 ms. See

Figure 9. RSOC is initialized using the 1st sampled voltage

automatically with the initial sequence. The four sampled

voltage are maintained until the LSI is reset. “Before RSOC”

command can select a voltage for RSOC initialization from

them. See Table 7. If the battery is not charged during initial

sequence the maximum voltage is suitable for more accurate

initial RSOC. Try all “Before RSOC” command and read

RSOC (0x0D) to search the maximum voltage. The higher

RSOC after the command is caused by the higher voltage.

Figure 10. Initial RSOC Command

Cell Temperature (TSENSE1) (0x08)

This register contains the cell temperature from −30_C

(0×0980) to +80_C (0×0DCC) measured in 0.1_C units.

When Bit 0 of Status Bit (0x16) is 1 the LSI measures the

attached thermistor and loads the temperature into the Cell

Temperature register. For this mode, the thermistor shall be

connected to the LSI as shown in Figure 1. TSENSE1 pin

provides power to the thermistor and senses it. Temperature

measurement timing is controlled by the LSI, and the power

to the thermistor is supplied only at the time.

The Cell Temperature is used for battery measurement

that includes RSOC. Then when Bit 0 of Status Bit (0x16)

is 0 the application processor must input temperature of the

battery to this register. Update of Cell temperature is

recommended if the temperature changes more than 1_C

during battery charging and discharging.

Figure 9. Sampling order for Before RSOC Command

Table 7. BEFORE RSOC COMMAND

Sampling order of

Command

Code

Battery Voltage for

RSOC Initialization

DATA

Cell Voltage (0x09)

This register contains the V voltage in mV.

st

0x04

0xAA55

0xAA56

0xAA57

0xAA58

1

sampling

DD

nd

2

3

4

rd

th

Current Direction (0x0A)

This register is used to control the reporting of RSOC. In

Auto mode the RSOC is reported as it increases or decreases.

In Charge mode the RSOC is not permitted to decrease. In

Discharge mode the RSOC is not permitted to increase.

With consideration of capacity influence by temperature,

we recommend operating in Auto because RSOC is affected

TimeToFull (0x05)

This register contains estimated time to full in minutes.

The full is defined as the state that RSOC (0x0D) is 100%.

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10

LC709204F

APAvalue + Lower_APA ) (Upper_APA * Lower_APA)

Capacity * Lower_Cap.

by the cell temperature. A warm cell has more capacity than

a cold cell. Be sure not to charge in the Discharge mode and

discharge in the Charge mode; it will create an error.

An example of RSOC reporting is shown in Figure 11 and

Figure 12.

(eq. 1)

Upper_Cap. * Lower_Cap.

Calculation example in case 1500 mAh battery Type−01:

APAvalue + 45:0x2D ) (58:0x3A * 45:0x2D)

1500 * 1000

+ 52:0x34

2000 * 1000

The upper 8−bits and the lower 8−bits of APA register are

for charging and discharging adjustment parameters each.

See Table 9. Table 8 shows them as the same value. For

example the set value in APA register is 0x0D0D for 0x0D

APA value.

But RSOC accuracy may be improved by setting different

values each depending on the target battery characteristics.

Please contact onsemi if you don’t satisfy the RSOC

accuracy. The deeper adjustment of APA value may improve

the accuracy.

Figure 11. Discharge Mode

(An example with increasing in temperature. A warm

cell has more capacity than a cold cell. Therefore

RSOC increases without charging in Auto mode)

Table 8. TYPICAL APA VALUE FOR CHARGING AND

DISCHARGING ADJUSTMENT

APA[15:8],APA[7:0]

Design

Capacity

Type−01

0x13, 0x13

0x15, 0x15

0x18, 0x18

0x21, 0x21

0x2D, 0x2D

0x3A, 0x3A

0x3F, 0x3F

0x42, 0x42

0x44, 0x44

0x45, 0x45

Type−06

0x0C, 0x0C

0x0E, 0x0E

0x11, 0x11

0x17, 0x17

0x1E, 0x1E

0x28, 0x28

0x30, 0x30

0x34, 0x34

0x36, 0x36

0x37, 0x37

Type−07

0x03, 0x03

0x05, 0x05

0x07, 0x07

0x0D, 0x0D

0x13, 0x13

0x19, 0x19

0x1C, 0x1C

−

50 mAh

100 mAh

200 mAh

500 mAh

1000 mAh

2000 mAh

3000 mAh

4000 mAh

5000 mAh

6000 mAh

−

Figure 12. Charge Mode

(An example with decreasing in temperature. A cold

cell has less capacity than a warm cell. Therefore

RSOC decreases without discharging in Auto mode)

APA[15:8], APA[7:0]

Design

Capacity

Type−04

0x10, 0x10

Type−05

0x06, 0x06

2600 mAh

Adjustment Pack Application (0x0B)

This register contains APA values which are parameter to

fit installed battery profiles in a target battery characteristics.

Appropriate APA values for the target battery will improve

RSOC accuracy.

Typical APA values can be taken from the design capacity

of the battery in Table 8. Table 8 shows relations of typical

APA value and the design capacity. Use capacity per 1−cell

for the table if some batteries are connected in parallel.

Calculate APA values using linear supplement if there is not

a requested design capacity in the table. See following

formula.

Table 9. BIT CONFIGURATION OF APA REGISTER

BITS

Register Name

APA[15:8]

APA[7:0]

APA value for charging adjustment

APA value for discharging adjustment

Adjustment Pack Thermistor (0x0C)

This LSI will power external NTC thermistors

periodically to measure CELL and AMBIENT temperature.

Internal pull−up resistors of TSENSE1 and TSENSE2 turn

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11

LC709204F

on for the charging. This register contains the delay time

from the turn−on to the temperature measurement. The

delay time is calculated by following formula.

of a battery. The other is rescaling. Set Sleep mode to keep

the data. Writing to this register is not necessary in normal

operation. ITE (0x0F) will be updated with the writing too.

Delay + 0.167 ms (200 ) APT)

(eq. 2)

TSENSE2 Thermistor B (0x0E)

Sets B−constant of the thermistor which is connected to

TSENSE2. Refer to the specification sheet of the thermistor

for the set value to use.

The both of TSENSE1 and TSENSE2 resistors turn on at

the same time. See Figure 13 about the delay and waveform.

The default APT (0x001E) will meet most of circuits where

a capacitor as shown in Figure 14 is not placed. This will

delay the measurement with this register if there is

a capacitor in target battery pack.

Indicator to Empty (0x0F)

This register contains RSOC in 0.1%.

IC Version (0x11)

This register contains an internal management code. The

value is not published.

Delay

Change of the Parameter (0x12)

The LSI contains five type battery profiles. This register

can select a target battery profile from them. See Table 10.

Nominal/rated voltage or charging voltage of the target

battery support to determine which battery profile shall be

used.

Measures voltage

In addition to the selection this command initializes

RSOC using the selected battery profile and the 1st sampled

voltage during initial sequence. Refer to Before RSOC

(0x04) section about the voltage.

Time

Figure 13. Example of TSENSE1 and TSENSE2

Voltage at Temperature Measurement

Alarm Low RSOC (0x13)

The ALARMB pin will output low level and the bit 9 of

BatteryStatus register (0x19) will be set to 1 when RSOC

(0x0D) falls below this value. ALARMB pin will be

released from low when RSOC value rises than this value.

But the bit 9 keeps 1 until it is written or Power−on reset. Set

this register to 0 to disable. Figure 15.

Application

Battery Pack

PACK+

TSENSE

T

LC709204F

PACK-

A capacitor across a thermistor

Figure 14. An Example of a Capacitor Across

the Thermistor

RSOC (0x0D)

This register contains rescaled RSOC in 1%. It is same as

ITE (0x0F) when Termination current rate (0x1C) and

Empty Cell Voltage (0x1D) are default values.

When this register is written in Operational mode the data

may be updated by following two behaviors of the LSI. One

is the automatic convergence to close RSOC to actual value

Figure 15. Alarm Low RSOC

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12

LC709204F

Table 10. BATTERY PROFILE VS. REGISTER

Battery

Type

Nominal / Rated

Number of the Parameter

(0x1A)

Change of the

Parameter (0x12)

Voltage

IC Type

Charging Voltage

LC709204FXE−01TBG

01

04

05

06

07

3.7 V

4.2 V

0x1001

0x00

0x01

0x02

0x03

0x04

UR18650ZY (Panasonic)

ICR18650−26H (SAMSUNG)

3.8 V

4.35 V

4.4V

3.85V

Alarm Low Cell Voltage (0x14)

is released from low. When it is switched from Sleep mode

to Operational mode RSOC calculation is continued by

using the data which was measured in the previous

Operational mode.

The ALARMB pin will output low level and the bit 11 of

BatteryStatus register (0x19) will be set to 1 if Cell Voltage

(0x09) falls below this value. ALARMB pin will be released

from low if VDD rises than this value. But the bit 11 keeps 1

until it is written or Power−on reset. Set this register to 0 to

disable. Figure 16.

Status Bit (0x16)

This register controls temperature measurement with

external thermistors. Bit 0 of this register controls

TSENSE1 thermistor and bit 1 controls TSENSE2. When

the bits are set to 1 the LSI measures temperature with the

attached thermistor and loads the temperature into the Cell

Temperature or Ambient Temperature register. When the

bits are set to 0 the LSI stops the measurement.

CycleCount (0x17)

This register contains the number of charging and

discharging cycles of a battery. The cycle is counted as “1”

when the total decrement of RSOC reaches 100%. The count

is started with 0 after battery insertion. Figure 17.

Figure 16. Alarm Low Cell Voltage

IC Power Mode (0x15)

The LSI has two power modes. Operational mode (0x15

= 01) or Sleep mode (0x15 = 02). In the Operational mode

all functions operate with full calculation and tracking of

RSOC during charge and discharge. In the Sleep mode only

2

Figure 17. CycleCount

I C communication functions is enable and ALARMB pin

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13

LC709204F

BatteryStatus (0x19)

(0.02C). The arrival of RSOC to the maximum value

becomes early when this value exceeds 0x02. This register

produces an offset between ITE and RSOC on full charge

side. See Figure 19. This offset value is calculated according

to battery profile and this register value.

This register contains different alarm and estimated states

of the battery. See Table 11. Each alarm bit is set to 1 when

each alarm condition is satisfied. The bits which are set to 1

once will keep 1 even if the alarm conditions are resolved.

Set the alarm bits to 0 after having confirmed the cause of the

alarm.

Empty Cell Voltage (0x1D)

Set the minimum battery voltage when RSOC is 0% in

mV. When this LSI detects that Cell Voltage (0x09) is lower

than Empty Cell Voltage (0x1D) it will set the ITE (0x0F)

value of the moment to ITE Offset (0x1E) automatically. See

Figure 18. RSOC (0x0D) is rescaled so that it is 0% when

ITE (0x0F) is equal to ITE Offset (0x1E). Following

formulas indicate the update conditions of ITE Offset

(0x1E).

Status bit 6 that is Discharging reports estimated state of

the battery. It means that a battery is discharged for 1 and

charged for 0.

Status bit 7 that is INITIALIZED helps that an application

processor detects the power−on reset of LSI on battery

insertion. The bit is set to 1 after power−on reset. Then the

processor can detect the power−on reset if it has set the bit

to 0 after previous power−on reset.

Cell Voltage (0x09) < Empty Cell Voltage (0x1D) (eq. 3)

ITE (0x0F) > ITE Offset (0x1E) (eq. 4)

Table 11. BATTERY STATUS

Cell Temperature (0x08) > 0x0AAC(05C) (eq. 5)

Set this register to 0 not to update ITE Offset (0x1E)

automatically.

ALARMB

control

Initial

value

BIT

15

14

13

12

11

10

9

Function

High Cell Voltage

Reserved

ALARM

0

1

0

n

−

Reserved

−

High Temperature

Low Cell Voltage

Reserved

n

−

Empty Cell Voltage

Low RSOC

Low Temperature

INITIALIZED

Discharging

Reserved

n

−

ITE Offset

8

7

STATUS

6

−

Discharging time

5

−

Figure 18. Empty Cell Voltage and ITE Offset in

Discharging

4

Reserved

−

3

Reserved

−

2

Reserved

−

RSOC without rescalling

RSOC with rescalling

100

90

80

70

60

50

40

30

20

10

0

1

Reserved

−

0

Reserved

−

Number of the Parameter (0x1A)

Full charge offset

The register contains identity of installed battery profile.

ITE Offset

Termination Current Rate (0x1C)

Set the termination current rate in charging when RSOC

(0x0D) arrives at 100% in 0.01C. (i.e. the set value is 0x02

for 3000mAh design capacity and 60mA termination

current.) The installed battery profiles are designed so that

ITE (0x0F) arrives at 0x3E8 when the battery current rate in

charging decreases to 0.02C.

0

100 200 300 400 500 600 700 800 900 1000

ITE

Figure 19. Rescaled RSOC by ITE Offset and

Termination Current Rate

Therefore ITE (0x0F) and RSOC (0x0D) will arrive at the

maximum value at the same time when this value is 0x02

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14

LC709204F

ITE Offset (0x1E)

Maximum Cell Voltage (0x2A)

This register is referred to transform ITE (0x0F) to RSOC

(0x0D). RSOC will be rescaled so that it is 0% when ITE

(0x0F) is equal to this register. See Figure 19. Refer to

Termination current rate section about the Full charge offset

in the figure.

There are two methods to update this register. One is to

write it directly. The other is an automatic update by Empty

Cell Voltage (0x1D). Refer to Empty Cell Voltage section

about it.

The maximum Cell Voltage (0x09) is stored. This register

will be updated whenever the higher voltage is detected. If

the lower voltage is written it can detect the higher voltage

than the written voltage again.

Minimum Cell Voltage (0x2B)

The minimum Cell Voltage (0x09) is stored. This register

will be updated whenever the lower voltage is detected. If

the higher voltage is written it can detect the lower voltage

than the written voltage again.

Alarm High Cell Voltage (0x1F)

Maximum Cell Temperature (TSENSE1) (0x2C)

The ALARMB pin will output low level and the bit 15 of

BatteryStatus register (0x19) register will be set to 1 when

Cell Voltage (0x09) rises than this value. ALARMB pin will

be released from low when Cell Voltage falls below this

value. But the bit 15 keeps 1 until it is written or Power−on

reset. Set this register to 0 to disable.

The maximum Cell Temperature (0x08) is stored. This

register will be updated whenever the higher temperature is

detected. If the lower temperature is written it can detect the

higher temperature than the written temperature again.

Minimum Cell Temperature (TSENSE1) (0x2D)

The minimum Cell Temperature (0x08) is stored. This

register will be updated whenever the lower temperature is

detected. If the higher temperature is written it can detect the

lower temperature than the written temperature again.

Alarm Low Temperature (0x20)

The ALARMB pin will output low level and the bit 8 of

BatteryStatus register (0x19) will be set to 1 when Cell

Temperature (0x08) falls below this value. ALARMB pin

will be released from low when Cell Temperature rises than

this value. But the bit 8 keeps 1 until it is written or Power−on

reset. Set this register or Bit 0 of Status Bit (0x16)to 0 to

disable.

Ambient Temperature (TSENSE2) (0x30)

This register contains the ambient temperature from

−30°C (0×0980) to +80°C (0×0DCC) measured in 0.1°C

units. When Bit 1 of Status Bit (0x16) is 1 the LSI measures

the attached thermistor and loads the temperature into the

Ambient Temperature register. The operation is the same as

TSENSE1.

Ambient Temperature is not used for battery gauging.

Therefore a temperature measurement of any place is

possible.

Alarm High Temperature (0x21)

The ALARMB pin will output low level and the bit 12 of

BatteryStatus register (0x19) will be set to 1 when Cell

Temperature (0x18) rises than this value. ALARMB pin will

be released from low when Cell Temperature falls below this

value. But the bit 12 keeps 1 until it is written or Power−on

reset. Set this register or Bit 0 of Status Bit (0x16) to 0 to

disable.

State of Health (0x32)

This register contains State of Health of a battery in 1%

unit. After the battery insertion, this register is started at

100%. It decreases by deterioration of the battery.

TotalRuntime (0x24, 0x25)

This register contains an elapsed time of Operational

mode after battery insertion in minutes. The LSI stops the

counting when it reaches 0xFFFFFF. When this register is

written it starts counting from the written value. It doesn’t

count in Sleep mode.

User ID (0x36, 0x37)

This register contains 32bits data written in built−in

NVM. It is usable for various purposes. Refer to an

application note about how to write the NVM.

Accumulated Temperature (0x26, 0x27)

HG−CVR2

In Operational mode this register accumulates Cell

Temperature (0x08) value per minute. It stops the

accumulating when it reaches 0xFFFFFFFF. When this

register is written it starts accumulating from the written

value. It doesn’t count in Sleep mode.

Hybrid Gauging by Current-Voltage Tracking with

Internal Resistance

HG−CVR2 is onsemi’s unique method which is used to

calculate accurate RSOC. HG−CVR2 first measures battery

voltage and temperature. Precise reference voltage is

essential for accurate voltage measurement. LC709204F has

accurate internal reference voltage circuit with little

temperature dependency.

Accumulated RSOC (0x28, 0x29)

In Operational mode this register accumulates RSOC

(0x0D) value per minute. It stops the accumulating when it

reaches 0xFFFFFFFF. When this register is written it starts

accumulating from the written value. It doesn’t count in

Sleep mode.

It also uses the measured battery voltage and internal

impedance and Open Circuit Voltage (OCV) of a battery for

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15

LC709204F

Automatic Convergence of the Error

the current measurement. OCV is battery voltage without

load current. The measured battery voltage is separated into

OCV and varied voltage by load current. The varied voltage

is the product of load current and internal impedance. Then

the current is determined by the following formulas.

A problem of coulomb counting method is the fact that the

error is accumulated over time − This error must be

corrected. The general gauges using coulomb counting

method must find an opportunity to correct it.

This LSI with HG−CVR2 has the feature that the error of

RSOC converges autonomously, and doesn’t require

calibration opportunities. The error constantly converges in

the value estimated from the Open Circuit Voltage.

Figure 20 shows the convergent characteristic example

from the initialize error.

Also, coulomb counting method cannot detect accurate

residual change because the amount of the current from

self-discharge is too small but HG−CVR2 is capable to deal

with such detection by using the voltage information.

V(VARIED) + V(MEASURED) * OCV

(eq. 6.)

V(VARIED)

I +

(eq. 7.)

R(INTERNAL)

Where V(VARIED) is varied voltage by load current,

V(MEASURED) is measured voltage, R(INTERNAL) is

internal impedance of a battery. Detailed information about

the internal impedance and OCV is installed in the LSI. The

internal impedance is affected by remaining capacity,

load-current, temperature, and more. Then the LSI has the

information as look up table. HG−CVR2 accumulates

battery coulomb using the information of the current and a

steady period by a high accuracy internal timer. The

remaining capacity of a battery is calculated with the

accumulated coulomb.

Simple and Quick Setup

In general, it is necessary to obtain multiple parameters for

a fuel gauge and it takes a lot of resource and additional

development time of the users. One of the unique features of

LC709204F is very small number of parameters to be

prepared by the beginning of battery measurement – the

minimum amount of parameter which users may make is

one because Adjustment pack application register has to

have one. Such simple and quick start-up is realized by

having multiple profile data in the LSI to support various

types of batteries. Please contact your local sales office to

learn more information on how to measure a battery that

cannot use already-prepared profile data.

How to Identify Aging

By repeating discharge/charge, internal impedance of

a battery will gradually increase, and the Full Charge

Capacity (FCC) will decrease. In coulomb counting method

RSOC is generally calculated using the FCC and the

Remaining Capacity (RM).

RM

RSOC +

100%

(eq. 8.)

FCC

Then the decreased FCC must be preliminarily measured

with learning cycle. But HG−CVR2 can measure the RSOC

of deteriorated battery without learning cycle. The internal

battery impedance that HG−CVR2 uses to calculate the

current correlates highly with FCC. The correlation is based

on battery chemistry. The RSOC that this LSI reports using

the correlation is not affected by aging.

Low Power Consumption

Low power consumption of 2.0 mA is realized in the

Operation mode. This LSI monitors charge/discharge

condition of a battery and changes the sampling rate

according to its change of current. Power consumption

reduction without deteriorating its RSOC accuracy was

enabled by utilizing this method.

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16

LC709204F

TYPICAL CHARACTERISTICS

NOTE: This Graph is the example for starting point 90% (includes 30−32% error).

Figure 20. Convergent Characteristic from the Initialize Error

Reset

Initialization

Sleep Mode

VDD

V

RR

T

INT

(Not to Scale)

Figure 21. Power On Timing Diagram

Power-on Reset/Battery Insertion Detection

When this LSI detects battery insertion, it is reset

automatically. Once the battery voltage exceeds over the

that the LSI receives battery temperature from an

application processor. In the figure Mandatory settings to

measure RSOC are enclosed in sold line. Optional settings

to use each required function are enclosed in dotted line.

Set some mandatory or optional parameters at the

beginning. RSOC (0x0D) is updated to the value

corresponding to a selected battery profile after Change of

the Parameter command (0x12). Then set the LSI to

Operational mode. At the end of starting flow set

INITIALIZED bit to 0. An application processor can detect

whether the LSI was reinitialized by reading the bit. (For

example, for turn−off by Lib−protection IC) Repeat this

starting flow again if this bit is changed to 1.

V , it will release RESET status and will complete LSI

RR

initialization within T

to enter into Sleep mode. All

INIT

2

registers are initialized after Power-on reset. Then I C

communication can be started. Figure 21.

Measurement Starting Flow

After the initialization users can start battery

measurement by writing appropriate value into the registers

by following the flow shown in Figure 22−23. Figure 22

shows Thermistor mode that the LSI measures battery

2

temperature with thermistors. Figure 23 shows I C mode

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17

LC709204F

Mandatory settings

Optional settings

XXXX

Power On

Write APA

Write 0xZZZZ

Write 0x00ZZ

Write Termination

current rate

to register 0x0B.

to register 0x1C.

Write 0x000Z

Write 0xZZZZ

Write Change Of

The Parameter

Write Empty Cell

Voltage

to register 0x12.

Select a battery profile.

to register 0x1D.

Write 0xZZZZ

Write alarm thresholds

Write TSENSE1

Thermistor B

Write alarm

thresholds

to register 0x06.

to 0x13/0x14/0x1F-0x21.

Write 0xZZZZ

Write 0x0001

Write TSENSE2

Thermistor B

Write IC Power

mode

to register 0x0E.

to register 0x15.

Set Operational mode.

Write 0xZZZZ

Write 0x0000

Write

BatteryStatus

to register 0x0C.

to register 0x19.

Reset INITILAIZED bit.

Write APT

Write 0x000Z

Initialization End

to register 0x16.

Set thermistor mode.

Write Status Bit

Figure 22. Starting Flow at Thermistor Mode

Mandatory settings

XXXX

Power On

Write APA

Optional settings

XXXX

Write 0xZZZZ

Write alarm thresholds

Write alarm

thresholds

to register 0x0B.

to 0x13/0x14/0x1F-0x21.

Write 0x000Z

Write 0x0001

Write Change Of

The Parameter

Write IC Power

mode

to register 0x12.

Select a battery profile.

to register 0x15.

Set Operational mode.

Write 0x00ZZ

Write 0x0000

Write Termination

current rate

Write

BatteryStatus

to register 0x1C.

to register 0x19.

Reset INITILAIZED bit.

Write 0xZZZZ

Write Empty Cell

Voltage

Initialization End

to register 0x1D.

Figure 23. Starting Flow at I²C Mode

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18

LC709204F

Layout Guide

Figure 24 shows the recommended layout pattern around

LC709204F. Place CVDD and CREG capacitor near the

LSI. Short−pin with TSENSE2 and NF1 to pull out

TSENSE2 is permitted.

The resistance of the Power paths between Battery or

Battery Pack and the LSI affects the gauging. Place the LSI

to minimize the resistance. But the resistance of the paths

which is connected to only this LSI doesn’t affect it.

PACK+

TSENSE1

TSENSE2

TEST2

SCL

VDD

NF2

NF1

REG

VSS

SDA

TEST1

CREG

ALARMB

PACK-

Figure 24. Layout Pattern Example Around LC709204F (Top View)

Application

PACK+

Battery

Application

LC709204F

or

processor

Battery Pack

PACK −

The Power paths that the resistance should be minimized

Figure 25. Position to Connect LC709204F on Power Supply Lines

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19

LC709204F

Table 12. ORDERING INFORMATION

Device

†

Package

Shipping

LC709204FXE−01TBG

WLCSP12, 1.48x1.91x0.51

(Pb-Free / Halogen Free)

5,000 / Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

2

onsemi is licensed by the Philips Corporation to carry the I C bus protocol. All other brand names and product names

appearing in this document are registered trademarks or trademarks of their respective holders.

www.onsemi.com

20

MECHANICAL CASE OUTLINE

PACKAGE DIMENSIONS

WLCSP12, 1.48x1.91x0.51

CASE 567XE

ISSUE A

DATE 22 FEB 2019

GENERIC

MARKING DIAGRAM*

XXXX = Specific Device Code

*This information is generic. Please refer to

A

= Assembly Location

WL = Wafer Lot

YY = Year

WW = Work Week

device data sheet for actual part marking.

Pb−Free indicator, “G” or microdot “G”, may

or may not be present. Some products may

not follow the Generic Marking.

XXXXXXXX

AWLYYWW

Electronic versions are uncontrolled except when accessed directly from the Document Repository.

Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.

DOCUMENT NUMBER:

DESCRIPTION:

98AON99809G

WLCSP12, 1.48x1.91x0.51

PAGE 1 OF 1

ON Semiconductor and

are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding

the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically

disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the

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www.onsemi.com

onsemi,

, and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates

and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.

A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi reserves the right to make changes at any time to any

products or information herein, without notice. The information herein is provided “as−is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the

information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use

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vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license

under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems

or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should

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For additional information, please contact your local Sales Representative at

www.onsemi.com/support/sales




型号：	LC709204FXE-01TBG
厂家：	ONSEMI
描述：	Battery Fuel Gauge for 1-Cell Lithium-Ion/Polymer (Li+) [Smart Lib Gauge] with low-power 2 µA operation 电池仪表
文件：	总22页 (文件大小：594K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LC709204FXE-01TBG [ONSEMI]

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LC709209FXE-01TBG

LC709501F

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