TIDUEY1B November 2020 – April 2024 BQ25798
The BQ25798 is a highly integrated switch-mode buck-boost charger for 1 to 4 cell Li-ion battery and Li-polymer battery. The integration includes four switching MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, battery FET (QBAT) and all the loop compensation of the buck-boost converter. This battery charger receives I2C commands from the PD controller to set up the registers appropriately for the desired application. There are sockets to connect the charger to a system as well as a battery.