BQ24800
Description
The BQ24800 device is a high-efficiency, synchronous buck multi-chemistry battery charger supporting 1-, 2-, 3-, or 4-series Li+ cells, or other battery chemistries up to 19.2V.
Key Features
- Hybrid Power Boost Mode to power up system from adapter and battery together - Ultra-fast transient response of 150µs to enter Hybrid Power Boost Mode
- Battery Only Boost Mode to support larger system transients and extend battery run time
- Peak power two-level input current limit to maximize the power from adapter and minimize battery discharge
- Charge 1- to 4-cell battery pack from 4.5V to 24V adapter
- High accuracy power and current monitoring for CPU throttling - Comprehensive PROCHOT profile - ± 2% Current monitor accuracy - ± 5% System Power Monitor Accuracy (PMON)
- Automatic NMOS power source selection from adapter or battery - ACFET Fast turn on in 100µs when exiting learn mode from battery removal
- Programmable input current, charge voltage, charge and discharge current limit - ±0.4% Charge voltage (16mV/step) - ±2% Input current (64mA/step) - ±2% Charge current (64mA/step) - ±2% Discharge current (512mA/step)
- High integration - Battery LEARN function - Battery present monitor - Boost Mode indicator - Loop compensation - BTST Diode
- Enhanced safety features for overvoltage protection, overcurrent protection, battery, inductor, and MOSFET short-circuit protection
- Switching frequency: 300kHz, 400kHz, 600kHz, and 800kHz
Representative BQ24800 image (package may vary by manufacturer)
