BQ24170
Overview
The bq2417x device is a highly integrated standalone 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 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-mA Input Current With Adapter Present and Charge Disabled
