BQ25170: 800-mA Linear Battery Charger for 1-Cell Li-Ion, and LiFePO4

1 Features

Input voltage up-to 30-V tolerant
Automatic Sleep Mode for low power consumption
- 350-nA battery leakage current
- 85-µA input leakage current when charge disabled
Supports 1-cell Li-Ion, Li-Poly, and LiFePO₄
External resistor programmable operation
- VSET to set battery regulation voltage:
  - Li-Ion: 4.05 V, 4.1 V, 4.2 V, 4.35 V, 4.4 V
  - LiFePO₄: 3.5 V, 3.6 V, 3.7 V
- ISET to set charge current from 10 mA to 800 mA
High accuracy
- ±0.5% charge voltage accuracy
- ±10% charge current accuracy
Charging features
- Precharge current 20% of ISET
- Termination current 10% of ISET
- NTC thermistor input to monitor battery temperature
- TS pin for charging function control
- Open-drain output for status and fault indication
- Open-drain output for power good indication
Integrated fault protection
- 6.6-V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000-mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection