BQ29401 - 2、3 或 4 节锂电池的电压保护（第 2 级保护）

BQ29401是TI德州仪器公司的一款电池监控,保护及认证解决方案产品，BQ29401是2、3 或 4 节锂电池的电压保护（第 2 级保护），本站介绍了BQ29401的封装应用图解、特点和优点、功能等，并给出了与BQ29401相关的TI元器件型号供参考。

BQ29401 - 2、3 或 4 节锂电池的电压保护（第 2 级保护） - 电池监控,保护及认证解决方案 - 电池管理产品 - 德州仪器

产品描述

The bq29400, bq29400A, bq29401, and bq29405 are BiCMOS secondary protection ICs for 2-, 3-, or 4-cell Lithium-Ion battery packs that incorporate a high-accuracy precision over voltage detection circuit. They include a programmable delay circuit for over voltage detection time.

Each cell in a multiple cell pack is compared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq2940x device starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level.

产品特性

2-, 3-, or 4-Cell Secondary Protection
Low Power Consumption ICC < 2 µA [VCELL(ALL) <V(PROTECT)]
High Accuracy Over Sense Voltage:
- bq29400: 4.35 V ±25 mV
- bq29400A: 4.40 V ±25 mV
- bq29401: 4.45 V ±25 mV
- bq29405: 4.65 V ±25 mV
Prefixed Protection Threshold Voltage
Programmable Delay Time
High Power Supply Ripple Rejection
Stable During Pulse Charge Operation
APPLICATIONS
- 2nd Level Protection in Lion Battery Packs in
  - Notebook PCs
  - Portable Instrumentation
  - Medical and Test Equipment

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