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BQ29312A Datasheet(PDF) 1 Page - Texas Instruments

Part # BQ29312A
Description  FOUR-CELL LITHIUM-ION
Download  39 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ29312A Datasheet(HTML) 1 Page - Texas Instruments

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RTH
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FEATURES
APPLICATIONS
DESCRIPTION
SYSTEM PARTITIONING DIAGRAM
LDO, Therm Output Drive & UVLO
Power Management
LDO, TOUT, and Power Mode control
I2C
Capacity Prediction <1% Error
SMBus
Pack +
Pack -
Discharge / Charge /
Precharge FETs
Cell and Pack
Voltage
Measurement
Precharge
FET Drive
2-Tier Overcurrent Protection
32-kHz Clock
Generator
bq2084
768 Bytes of
User Flash
Fuse
1stLevel OV and
UV Protection
Pack Undervoltage
Power Mode
Control
Precharge Control
Delay Counters
Cell Balancing Algorithm and Control
Cell Balancing
Drive
System Interface
System Watchdog
Voltage Level Translator
System Interface
32 kHz
Power Mode Control
Fail-Safe Protection
T1
1st Level OC
Protection
Temperature Measurement
<1% Error
TINT
Supply V oltage
bq29312A
PCH FET Drive
RAM Registers
SBS v1.1 Data
bq29312 RAM/Comms Validation
XAlert
Sleep
Sense Resistor
(10 - 30 m W)
PF Input
bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR
LITHIUM-POLYMER BATTERY PROTECTION AFE
Notebook PCs
2-, 3-, or 4-Cell Series Protection Control
Medical and Test Equipment
Can Directly Interface With the bq2084 Gas
Portable Instrumentation
Gauges
Provides Individual Cell Voltages and Battery
Voltage to Battery Management Host
The bq29312A is a 2-, 3-, or 4-cell lithium-ion battery
Integrated Cell Balancing Drive
pack protection analog front end (AFE) IC that
I2C Compatible User Interface Allows Access
incorporates a 3.3-V, 25-mA low-dropout regulator
to Battery Information
(LDO). The bq29312A also integrates an I2C compat-
Programmable Threshold and Delay for
ible interface to extract battery parameters such as
Overload and Short Circuit During Charge and
cell voltages and control output status. Other par-
Discharge
ameters such as current protection thresholds and
delays can be programmed into the bq29312A to
System Alert Interrupt Output
increase the flexibility of the battery management
Host Control Can Initiate Sleep Power Mode
system.
and Ship Mode
The bq29312A provides safety protection for over-
Integrated 3.3-V, 25-mA LDO
charge,
overload,
short-circuit,
overvoltage,
and
Supply Voltage Range From 4.5 V to 25 V
undervoltage conditions with the battery management
host. In overload and short-circuit conditions, the
Low Supply Current of 60-µA Typical
bq29312A turns the FET drive off autonomously
bq29312A is 100% specification compatible
dependant on the internal configuration setting.
with the bq29312
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.


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