bq25750 Buck-Boost Battery Charge Controller Texas Instruments bq25750 Bi-Directional Buck-Boost Battery Charge Controller is a wide input voltage, Li-polymer, switched-mode buck-boost Li-Ion, or LiFePO 4 battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range, charge voltage regulation and accurate charge current, automatic termination, charge preconditioning, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, providing a high-density solution that is easy to use. In reverse mode, the device draws power from the battery and regulates the SYS terminal voltage.