bq29209
Overview
The bq2920x 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.
- 1 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 Thresholds:
- 30 V, 4.35 V
