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.