bq29441 Overview
The bq2944x is a secondary overvoltage protection IC for 2-series, 3-series, or 4-series cell Li-Ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit. FUNCTION The voltage of each cell in a battery pack is pared to an internal reference voltage. If any cells reach an overvoltage condition, the bq2944x device starts a timer that provides a delay proportional to the capacitance...
bq29441 Key Features
- 2-Series, 3-Series, or 4-Series Cell Secondary Protection
- External Capacitor-Controlled Delay Timer
- Low Power Consumption ICC < 2 µA Typical [VCELL(ALL) < VPROTECT]
- High-Accuracy Overvoltage Protection: ±25 mV with TA = 0°C to 60°C
- Fixed Overvoltage Protection Thresholds: 4.30 V, 4.35 V, 4.40 V, 4.45 V, 4.50 V
- Small 8L QFN Package
bq29441 Applications
- Second-Level Protection in Li-Ion Battery Packs