BQ24172
Features
- 1 1.6-MHz Synchronous Switched-Mode Charger with 4-A Integrated N-MOSFETs
- Up to 94% Efficiency
- 30-V Input Rating with Adjustable Overvoltage
Protection
- 4.5-V to 17-V Input Operating Voltage Range
- Battery Charge Voltage
- bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
- bq24172: Adjustable Charge Voltage
- High Integration
- Automatic Power Path Selector Between
Adapter and Battery
- Dynamic Power Management
- Integrated 20-V Switching MOSFETs
- Integrated Bootstrap Diode
- Internal Digital Soft Start
- Safety
- Thermal Regulation Loop Throttles Back
Current to Limit TJ = 120°C
- Thermal Shutdown
- Battery Thermistor Sense Hot/Cold Charge
Suspend and Battery Detect
- Adjustable Input Overvoltage Protection
- Cycle-by-Cycle Current Limit
- Accuracy
- ±0.5% Charge Voltage Regulation
- ±4% Charge Current Regulation
- ±4% Input Current Regulation
- <15-μA Battery Current With Adapter Removed
- <1.5-m A Input Current With Adapter Present and
Charge Disabled
2 Applications
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