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BQ29312A

更新时间： 2024-09-14 21:54:47
品牌 Logo 应用领域
德州仪器 - TI 电池
页数 文件大小 规格书
35页 1106K
描述
TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

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BQ29312A 数据手册

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PW  
RTH  
bq29312A  
www.ti.com  
SLUS629A–JANUARY 2005–REVISED AUGUST 2005  
TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR  
LITHIUM-POLYMER BATTERY PROTECTION AFE  
FEATURES  
APPLICATIONS  
•
•
•
Notebook PCs  
Medical and Test Equipment  
Portable Instrumentation  
•
2-, 3-, or 4-Cell Series Protection Control  
•
Can Directly Interface With the bq2084 Gas  
Gauges  
•
Provides Individual Cell Voltages and Battery  
Voltage to Battery Management Host  
DESCRIPTION  
The bq29312A is a 2-, 3-, or 4-cell lithium-ion battery  
pack protection analog front end (AFE) IC that  
incorporates a 3.3-V, 25-mA low-dropout regulator  
(LDO). The bq29312A also integrates an I2C compat-  
ible interface to extract battery parameters such as  
cell voltages and control output status. Other par-  
ameters such as current protection thresholds and  
delays can be programmed into the bq29312A to  
increase the flexibility of the battery management  
system.  
•
•
Integrated Cell Balancing Drive  
I2C Compatible User Interface Allows Access  
to Battery Information  
•
Programmable Threshold and Delay for  
Overload and Short Circuit During Charge and  
Discharge  
•
•
System Alert Interrupt Output  
Host Control Can Initiate Sleep Power Mode  
and Ship Mode  
The bq29312A provides safety protection for over-  
charge, overload, short-circuit, overvoltage, and  
undervoltage conditions with the battery management  
host. In overload and short-circuit conditions, the  
bq29312A turns the FET drive off autonomously  
dependant on the internal configuration setting.  
•
•
•
•
Integrated 3.3-V, 25-mA LDO  
Supply Voltage Range From 4.5 V to 25 V  
Low Supply Current of 60-µA Typical  
bq29312A is 100% specification compatible  
with the bq29312  
SYSTEM PARTITIONING DIAGRAM  
Discharge / Charge /  
Fuse  
Precharge FETs  
Pack +  
bq2084  
bq29312A  
PF Input  
PCH FET Drive  
Precharge Control  
Fail-Safe Protection  
Supply V oltage  
Power Management  
Cell Balancing  
Drive  
Precharge  
FET Drive  
LDO, TOUT, and Power Mode control  
Temperature Measurement  
T
INT  
LDO, Therm Output Drive & UVLO  
<1% Error  
T1  
768 Bytes of  
User Flash  
32-kHz Clock  
Generator  
System Watchdog  
Delay Counters  
32 kHz  
Cell Balancing Algorithm and Control  
SBS v1.1 Data System Interface  
SMBus  
System Interface  
RAM Registers  
2
I
C
XAlert  
bq29312 RAM/Comms Validation  
Sleep  
st  
st  
1
Power Mode Control  
1
Level OC  
Level OV and  
Protection  
UV Protection  
Pack Undervoltage  
Power Mode  
Control  
Cell and Pack  
Voltage  
2-Tier Overcurrent Protection  
Measurement  
Capacity Prediction <1% Error  
Voltage Level Translator  
Pack -  
Sense Resistor  
(10 - 30 m W)  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
1234567...35

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BQ29312A 替代型号

型号 品牌 替代类型 描述 数据表
BQ76920 TI

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