bq25A Description
The BQ24725A is a high-efficiency, synchronous battery charger, offering low ponent count for space-constraint, multi-chemistry battery charging applications. The BQ24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection. SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation...
bq25A Key Features
- 1 SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching freq
- Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps
- Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circui
- Programmable input current, charge voltage, charge current limits
- ±0.5% Charge voltage accuracy up to 19.2V
- ±3% Charge current accuracy up to 8.128A
- ±3% Input current accuracy up to 8.064A
- ±2% 20x Adapter current or charge current amplifier output accuracy
- Programmable battery depletion threshold, and battery LEARN function
- Programmable adapter detection and indicator