The bq24650 is a highly integrated switch-mode battery charge controller. It provides input voltage regulaTIon, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulaTIon loop lowers the charge current so that the solar panel can provide maximum power output.
The bq24650 charges the battery in three phases: pre-conditioning, constant current, and constant voltage. Charge is terminated when the current reaches 1/10 of the fast charge rate.