BQ29209-Q1 Datasheet PDF - TI

●The bq29209-Q1 device is a secondary overvoltage protection IC for 2-series cell lithium-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 bq29209-Q1 can perform automatic voltage-based cell imbalance correction. Balancing can start when the cell voltages are different by nominally 30 mV or more and stops when the difference is nominally 0 mV. Cell balancing is enabled and disabled by the CB_EN pin.

● 2-Series Cell Secondary Protection

● Automatic Cell Imbalance Correction with External

●Enable Control

● ±30-mV Enable, 0-mV Disable Thresholds

●Typical

● External Capacitor-Controlled Delay Timer

● External Resistor-Controlled Cell Balance Current

● Low Power Consumption ICC < 3 µA Typical

●(VCELL(ALL) < VPROTECT)

● Internal Cell Balancing Handles Current

●up to 15 mA

● External Cell Balancing Mode Supported

● High-Accuracy Overvoltage Protection:

● ±25 mV with TA = 0°C to 60°C

● Fixed Overvoltage Protection Threshold:

●4.30 V

● Small 8L DRB Package

● Automotive-Qualified AEC Q100 Grade Two