BQ77905 Overview
The BQ77904 and BQ77905 devices are low-power battery pack protectors that implement a suite of voltage, current, and temperature protections without microcontroller (MCU) control. The device's stackable interface provides simple scaling to support battery cell applications from 3 series to 20 series or more. Protection thresholds and delays are factory-programmed and available in a variety of configurations.
BQ77905 Key Features
- NORMAL mode: 6 µA (BQ77904 and BQ77905)
- Full suite of voltage, current, and temperature
- Scalable cell count from 3 series to 20 series or
- Voltage protection (accuracy ±10 mV)
- Overvoltage: 3 V to 4.575 V
- Undervoltage: 1.2 V to 3 V
- Open cell and open-wire detection (OW)
- Current Protection
- Overcurrent discharge 1: -10 mV to -85 mV
- Overcurrent discharge 2: -20 mV to +170 mV