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DATA SHEET
BQ24725A SMBus 1- to 4-Cell Li+ Buck Battery Charge Controller with N-Channel Power MOSFET Selector
1 Features
- SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies
- 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 circuit protection
- 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
- Integrated soft start
- Integrated loop compensation
- Real time system control on ILIM pin to limit charge current
- AC Adapter operating range 4.5V-24V
- 5µA Off-state battery discharge current
- 0.65mA (0.8mA max) Adapter standby quiescent current
- 20-pin 3.5 x 3.5 mm2 VQFN Package
2 Applications
- Portable notebook computers, UMPC, Ultra-thin notebook, and Netbook
- Handheld terminal
- Industrial and medical equipment
- Portable equipment
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