TheBQ25910YFFR is an integrated three-levelswitch-mode parallel battery charge management device for single cell Li-ion and Li-polymerbatteries. Utilization of the three-level converter maintains highest switch-mode operationefficiency while reducing solution footprint and increasing power density. The device supports fast chargingwith high input voltage for a wide range of portable devices. The solution integratesreverse-blocking FET (QBLK), and four switching FETs(QHSA, QHSB, QLSB,QLSA). The I2C serial interface with charging andsystem settings makes the device a truly flexible solution.
Feature
- Parallel charger operation provides fast charging in dual charger configuration
- High efficiency 750-kHz switch mode three-level buck parallel charger
- Reduced ripple to support low profile inductor
- 95.4% Charge efficiency at 1.5 A from 5-V input
- 93.3% Charge efficiency at 3 A from 9-V input
- Superior efficiency compared to traditional buck converter in compact form factor
- Single Input to support USB input and adjustable high voltage adapters
- Support 3.9-V to 14-V input voltage range with 20-V absolute maximum input voltage rating
- Input current limit (500 mA to 3.6 A with 100-mA resolution) to support USB2.0 and USB 3.0 standard and high voltage adaptors
- Maximum power tracking by input voltage limit (VINDPM) up to 14 V
- Flexible I2C mode for optimal system performance
- High integration includes all MOSFETs, current sensing and loop compensation
- Lossless charge current sensing without sense resistor
- < 10-μA Low battery leakage current during stand-by mode
- High accuracy
- ±0.4% Charge voltage regulation
- ±10% Charge current regulation
- ±7.5% Input current regulation
- Remote differential battery sensing
- Safety
- Thermal regulation and thermal shutdown
- Input UVLO and overvoltage protection
- Battery OVP
- Input dynamic power management (DPM)
- Charging safety timer
- Flying capacitor short circuit protection
- Output voltage short circuit protection
- Available in 36-ball WCSP package
