1 Features

NORMAL mode: 6 µA (BQ77904 and BQ77905)
Full suite of voltage, current, and temperature protections
Scalable cell count from 3 series to 20 series or more
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
- Short circuit discharge: –40 mV to +340 mV
- Accuracy ±20% for ≤ 20 mV, ±30% for > 20 mV across full temperature
Temperature protection
- Overtemperature charge: 45°C or 50°C
- Overtemperature discharge: 65°C or 70°C
- Undertemperature charge: –5°C or 0°C
- Undertemperature discharge: –20°C or –10°C
Additional Features
- Independent charge (CHG) and discharge (DSG) FET drivers
- 36-V absolute maximum rating per cell input
- Built-in-self-test functions for high reliability
SHUTDOWN mode: 0.5-µA maximum
Functional Safety-Capable
- Documentation available to aid functional safety system design