Battery charger matches peak power tracking with simple control loop

摘要

Linear Technology Corp.'s LT3652 solar power directed monolithic buck battery charger IC for modern battery chemistries features an innovative input voltage regulation loop, which controls charge current to hold the input voltage at a programmed level. When the LT3652 is connected to a solar panel, the input regulation loop maintains the panel at peak output power. The LT3652, with a charge current programmable up to 2A, accepts a wide range of inputs from 4.95V to 32V with a 40V absolute maximum rating for added system margin. The input voltage regulation loop also allows optimized charging from poorly regulated sources where the input can collapse under overcurrent conditions.