BQ2112B-XXX [TI]
暂无描述;
| 型号： | BQ2112B-XXX |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 暂无描述 电池 仪表 |
| 文件： | 总7页 (文件大小：751K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
bq2112
NiCd or NiMH Gas Gauge Module
with Slow-Charge Control
Features
ä
Complete bq2012 Gas Gauge solution for NiCd or
NiMH battery packs
ä
ä
Output for slow-charge control of battery pack
Battery information available over a single-wire
bidirectional serial port
ä
ä
ä
Battery state-of-charge monitoring for 4- to 12-cell
series applications
On-board regulator allows direct connection to the
battery
“L” version includes push-button activated LEDs to
display state-of-charge information
ä
ä
Nominal capacity and cell chemistry pre-configured
Compact size for battery pack integration
A module development kit is also available for the
bq2112. The bq2112B-KT or bq2112LB-KT includes one
configured module and the following:
1) An interface board that allows connection to the se-
rial port of an AT-compatible computer.
General Description
The bq2112 Gas Gauge Module provides a complete and
compact solution for capacity monitoring of NiCd and
NiMH battery packs. Designed for battery pack integra-
tion, the bq2112 incorporates a bq2012 Gas Gauge IC, a
current sense resistor, and all other components neces-
sary to accurately monitor and display the capacity of 3
to 12 series cells. The bq2112L includes six surface-
mounted LEDs to display remaining capacity in 20% in-
crements of the learned capacity (relative mode) or pro-
grammed capacity (absolute mode). The sixth LED is
used in absolute mode to represent an overfull condition
(charge above the programmed capacity). The LEDs are
activated with the onboard push--button switch.
2) Menu-driven software with the bq2112 to display
charge/discharge activity and to allow user inter-
face to the bq2012 from any standard DOS PC.
3) Source code for the TSR.
Pin Descriptions
DQ/Serial communication port
BAT+/Battery positive/pack positive
CHG/Charge control output
EMPTY/Empty indicator output
GND/Ground
P1
P2
P3
P4
P5
P6
P7
Contacts are provided on the bq2112 for direct connec-
tion to the battery stack (BAT+, BAT-), the serial com-
munications port (DQ), the empty indicator (EMPTY),
and the charge control output (CHG). Please refer to the
bq2012 data sheet for the specifics on the operation of
the Gas Gauge.
PACK-/Pack negative
BAT-/Battery negative
Unitrode configures the bq2112 based on the informa-
tion requested in Table 1. The configuration defines the
number of series cells, the nominal battery pack capac-
ity, the self-discharge rate, and the LED display mode.
5/99 B
1
bq2112
Battery Pack
Cells
P7
P6
bq2112
P2
PACK+
PACK-
Load
Charger
FG-961
Figure 1. Module Connection Diagram
Table 1. bq2112 Module Configuration
Customer Name: ___________________________________________________________________________
Contact: _________________________________________ Phone: ______________________________
Address: _________________________________________________________________________________
_________________________________________________________________________________
Sales Contact: ____________________________________
Phone: ______________________________
Number of series battery cells (4-12)
Battery type (NiCd or NiMH)
Battery pack capacity (mAh)
Discharge rate into load (3.0A max.)
Charge rate (3.0A max)
________________________________________
________________________________________
________________________________________
Min.
Avg.
Max.
________________________________________
________________________________________
________________________________________
Display mode (absolute or relative)
LEDs and switch (Y/N)
FAE approval: _____________________________________
Date:________________________________
2
bq2112
bq2112 Schematic
Note:
Schematic shows components which may not be placed on the
board, depending upon the configuration.
3
bq2112
bq2112 Board
4
bq2112
Absolute Maximum Ratings
Symbol
Parameter
Relative to V
Minimum Maximum
Unit
Conditions
V
-0.3
+7.0
+7.0
3
V
V
bq2012
bq2012
CC
SS
All other pins
Relative to V
-0.3
SS
-
-
W
W
Thru-hole sense resistor
Continuous sense resis-
tor power dissipation
P
SR
1
Surface mount sense resistor
Continuous charge/
discharge current
I
-
3.0
A
CHG
T
Operating temperature
Storage temperature
0
+70
+85
°C
°C
Commercial
OPR
STR
T
-40
Note:
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation
should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to con-
ditions beyond the operational limits for extended periods of time may affect device reliability.
DC Electrical Characteristics (T = T
)
A
OPR
Symbol
Parameter
Minimum
Typical
Maximum
Unit Conditions/Notes
Number of series cells in bat-
tery pack
NumCell
BAT+
4
-
12
-
Positive terminal of pack
Negative terminal of pack
GND
NumCell * 1.2V NumCell * 1.8V
V
V
GND -
0.3
BAT-
-
GND+2.0
Supply current at BAT+ ter-
minal (no external loads)
µA
I
-
500k
-
200
300
-
CC
1
R
I
Internal pull-down
-
-
Ω
DQ
Open-drain sink current DQ,
EMPTY, CHG
1
5.0
mA
OL
Open-drain output low,
DQ, EMPTY, CHG
1
V
OL
I
OL
< 5mA
-
-
0.5
V
1
1
V
IHDQ
V
ILDQ
V
OS
DQ input high
DQ input low
Voltage offset
2.5
-
-
-
-
V
V
-
-
0.8
150
1
µV
Note:
1. Characterized on PCB, IC 100% tested.
5
bq2112
DC Voltage Thresholds (T = T
)
A
OPR
Symbol
Parameter
Minimum
Typical Maximum
Unit
Notes
1
1
1
V
Final empty warning
First empty warning
Maximum single-cell voltage
Sense resistor range
Valid charge
0.93
1.03
2.20
-300
375
-
0.95
0.97
1.07
2.30
+2000
-
V
V
BAT+/NumCell
BAT+/NumCell
EDVF
EDV1
MCV
SRO
V
V
V
V
V
1.05
2.25
V
BAT+/NumCell
2
-
-
-
mV
µV
µV
V
V
V
+ V
+ V
+ V
SR
SR
SR
OS
OS
OS
2, 3
2, 3
SRQ
Valid discharge
-300
SRD
Notes:
1. At SB input of bq2012.
2. At SR input of bq2012.
3. Default value; value set in DMF register.
Data Sheet Revision History
Change No.
Page No.
Description
1
1
2
5
Updated Table 1 to include 3.0A limit
Added 3.0A maximum continuous charge/discharge current specification
Note:
Change 1 = May 1999 B changes from Nov. 1997.
Ordering Information
bq2112
B —
Customer Code:
1
Blank = Sample or Pre-production
KT = Evaluation system
2
XXX = Customer specific; assigned by Unitrode
Package Option:
B = Board-level product
LED Option:
L = LEDs plus switch
Blank = No LEDs or switch
Device:
NiCd or NiMH Gas Gauge Module with Slow-Charge Control
Notes:
1. Requires configuration sheet (see Table 1)
2. Example production part number: bq2112LB-002
6
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1999, Texas Instruments Incorporated
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 202
-
VISHAY
©2020 ICPDF网 联系我们和版权申明