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 pared to a factory programmed internal reference voltage. If either cell reaches an overvoltage condition, the OUT pin changes from low to...
bq29209 Key Features
- 1 2-Series Cell Secondary Protection
- Automatic Cell Imbalance Correction with External
- ±30-mV Enable, 0-mV Disable Thresholds
- External Capacitor-Controlled Delay Timer
- External Resistor-Controlled Cell Balance Current
- Low Power Consumption ICC < 3 µA Typical
- Internal Cell Balancing Handles Current
- External Cell Balancing Mode Supported
- High-Accuracy Overvoltage Protection
- ±25 mV with TA = 0°C to 60°C
bq29209 Applications
- 2nd Level Protection in Li-Ion Battery Packs