BQ29312APW

Product Summary

The BQ29312APW 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 BQ29312APW 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 BQ29312APW to increase the flexibility of the battery managementsystem . The BQ29312APW 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 BQ29312APW turns the FET drive off autonomously dependant on the internal configuration setting.

Parametrics

Absolute maximum ratings:(1)Supply voltage range, PACK, BAT, VCC: –0.3V to 34V; (2)Input voltage range, VI, VC1, VC2, VC3, VC4: –0.3V to 34V; (3)Input voltage range, SR1, SR2: –1.0V to 1.0V; (4)Input voltage range, VC5: –1.0V to 4.0V; (5)Input voltage range, VC1 to VC2, VC2 to VC3, VC3 to VC4, VC4 toVC5: –0.3 to 8.5V; (6)Input voltage range, WDI, SLEEP, SCLK, SDATA: –0.3 to 8.5V; (7)Input voltage range, ZVCHG: –0.3V to 34V; (8)Output voltage range, VO, DSG, CHG: –0.3V to BAT; (9)Output voltage range, VO, OD: –0.3V to 34V; (10)Output voltage range, VO, PMS: –0.3V to PACK–0.2V; (11)Output voltage range, VO, TOUT, SCLK, SDATA, CELL, XALERT: –0.3 to 7V; (12)Current for cell balancing: 10mA; (13)Continuous total power dissipation: See Dissipation Rating Table; (14)Storage temperature range, Tstg: –65℃ to 150℃; (15)Lead temperature (soldering, 10 s): 300℃.

Features

Features: (1)2-,3-,or4-Cell Series Protection Control; (2)Can Directly Interface With the bq2084 Gas Gauges; (3)Provides Individual Cell Voltages and Battery Voltage to Battery Management Host; (4)Integrated Cell Balancing Drive; (5)I2C Compatible User Interface Allows Access to Battery Information; (6)Programmable Threshold and Delay for Overload and Short Circuit During Charge and Discharge; (7)System Alert Interrupt Output; (8)Host Control Can Initiate Sleep Power Mode; (9)Integrated 3.3-V, 25-mA LDO; (10)Supply Voltage Range From 4.5 V to 25 V; (11)Low Supply Current of 60-μA Typical; (12)BQ29312APW is 100% specification compatible with the bq29312.

Diagrams