BQ24171
Overview
The bq24171 device is highly integrated stand-alone Li-ion and Li-polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage.
- 1 JEITA-Compatible Battery Temperature Sensing
- 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
- Battery Charge Voltage - Adjustable Charge Voltage up to 3-Series Cells
- High Integration - Automatic Power Path Selector Between Adapter and Battery - Dynamic Power Management - Integrated 20-V Switching MOSFETs - Integrated Bootstrap Diode - Internal Loop Compensation - 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 - Input Overvoltage Protection With Programmable Threshold - Cycle-by-Cycle Current Limit
- Accuracy - ±0.5% Charge Voltage Regulation - ±4% Charge Current Regulation - ±4% Input Current Regulation
- Less Than 15-μA Battery Current With Adapter Removed
- Less Than 1.5-mA Input Current With Adapter Present and Charge Disabled
