Stand-alone or I²C controlled 70V bidirectional buck charge controller with power path

The BQ25820 is a wide input voltage, switched-mode buck Li-Ion, Li-polymer, or LiFePO4 battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the SYS terminal voltage.