bq24751
Overview
The bq24751 is a high-efficiency, synchronous battery charger with integrated compensation and system power selector logic, offering low component count for space-constrained multi-chemistry battery charging applications.
- NMOS-NMOS Synchronous Buck Converter with 300 kHz Frequency and >95% Efficiency
- 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
- High-Accuracy Voltage and Current Regulation - ±0.5% Charge Voltage Accuracy - ±3% Charge Current Accuracy - ±3% Adapter Current Accuracy - ±2% Input Current Sense Amp Accuracy
- Integration - Automatic System Power Selection From AC/DC Adapter or Battery - Internal Loop Compensation - Internal Soft Start
- Safety - Programmable Input Overvoltage Protection (OVP) - Dynamic Power Management (DPM) with Status Indicator - Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits - Reverse-Conduction Protection Input FET
- Supports Two, Three, or Four Li+ Cells
- 5 - 24 V AC/DC-Adapter Operating Range
- Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control - Charge Voltage (4-4.512 V/cell) - Charge Current (up to 10 A, with 10-mΩ sense resistor) - Adapter Current Limit (DPM)
- Status and Monitoring Outputs - AC/DC Adapter Present with Programmable Voltage Threshold - Current Drawn from Input Source
- Battery Learn Cycle Control
