bq24751A
Description
The bq24751A is a high-efficiency, synchronous battery charger with integrated pensation and system power selector logic, offering low ponent count for space-constrained multi-chemistry battery charging applications. Ratiometric charge current and voltage programming allows very high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs.
Key Features
- 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
- Integration – Automatic System Power Selection From AC/DC Adapter or Battery – Internal Loop pensation – Internal Soft Start
- Supports Two, Three, or Four Li+ Cells
- 5 – 24 V AC/DC-Adapter Operating Range
- Status and Monitoring Outputs – AC/DC Adapter Present with Programmable Voltage Threshold – Current Drawn from Input Source
- Battery Learn Cycle Control
- Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc
- Charge Enable
- 28-pin, 5x5-mm QFN package OVPSET AGND VREF VDAC VADJ ACGOOD BATDRV
