The BQ29209DRBR is a secondary Overvoltage Protection IC for 2-series cell Li-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit and automatic cell imbalance correction. The voltage of each cell in a 2-series cell battery pack is compared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to high state. The BQ2920X can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30mV or more and stops when the difference is nominally 0mV. Cell balancing is enabled and disabled by the CB_EN pin.
● Automatic cell imbalance correction with external enable control
● External capacitor-controlled delay timer
● External resistor-controlled cell balance current
● External cell balancing mode supported
● High-accuracy overvoltage protection
● Fixed overvoltage protection thresholds
● Green product and no Sb/Br
●Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
