BQ29449DRBR 供应商
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BQ29449DRBR
品牌：TI 封装/批号：SON8/23+
BQ29449DRBR 属性参数
- 标准包装：1
- 类别：集成电路 (IC)
- 家庭：PMIC - 电池管理
- 系列：-
- 功能：过压防护
- 电池化学：锂离子（Li-Ion）
- 电源电压：4 V ~ 25 V
- 工作温度：-40°C ~ 85°C
- 安装类型：表面贴装
- 封装/外壳：8-VDFN 裸露焊盘
- 供应商设备封装：8-SON 裸露焊盘（3x3）
- 包装：®
- 其它名称：296-27577-6
产品特性
- 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 Notebook Computers Power Tools Portable Equipment and Instrumentation
- Notebook Computers
- Power Tools
- Portable Equipment and Instrumentation
产品概述
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.FUNCTIONThe 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.