I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support

The BQ25731

is a synchronous buck-boost battery charge controller to charge a 1- to 5-cell battery from a wide range of input sources including USB adapter, high

voltage USB-C Power Delivery (PD) sources, and traditional adapters. It offers a low

component count, high efficiency solution for space constrained, 1- to 5-cell battery

charging applications.

During power

up, the charger sets the converter to a buck, boost, or buck-boost configuration based on

the input source and battery conditions. The charger seamlessly transits between the buck,

boost, and buck-boost operation modes without host control.