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bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIU...
www.ti.com
PW
RTH
bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE
FEATURES
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
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
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
APPLICATIONS
Notebook PCs Medical and Test Equipment Portable Instrumentation
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 compatible interface to extract battery parameters such as cell
voltages and control output status. Other parameters such as current protection thresholds and delays can be programmed into the bq29312A to increase the flexibility of the battery management system.
The bq29312A provides safety protection for overcharge, overload, short-circuit, over
voltage, and under
voltage conditions wit...