I²C controlled, 1-4-cell, 5-A buck-boost solar battery charger with dual-input selector and MPPT | RQM | 29 | -40 to 85

The BQ25798

is a fully integrated switch-mode buck-boost charger for 1-4 cell Li-ion batteries and Li-polymer batteries that the user

can or cannot remove from the end

equipment once installed. The integration includes 4 switching MOSFETs, input and charging

current sensing circuits, the battery FET and all the loop compensation of the buck-boost converter. It uses NVDC power path management, regulating the system not dropping

below a configurable minimum system voltage. When system power exceeds the input source

rating, battery supplement mode supports the system without overloading the input source.

BQ25798

also maximizes power from photovoltaic

panels using its built-in VOC scaling MPPT algorithm.BQ25798 supports ultra-fast switchover from the adapter to

a converted battery voltage in Backup Mode.