BQ29441
- 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
- APPLICATIONS
- Second-Level Protection in Li-Ion Battery Packs
- Notebook Computers
- Power Tools
- Portable Equipment and Instrumentation
- Second-Level Protection in Li-Ion Battery Packs
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 compared 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 on the CD pin. Upon expiration of the internal timer, the OUT pin changes from a low state to a high state. An optional latch configuration is available that holds the OUT pin in a high state indefinitely after an overvoltage condition has satisfied the specified delay timer period. The latch is released when the CD pin is shorted to GND.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Voltage Protection For Two-, Three-, or Four-Cell Li-Ion Batteries 数据表 (Rev. C) | 2010年 11月 30日 |
设计和开发
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
VSON (DRB) | 8 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点