Two Elements Lead-Acid 16V…32V@2A Battery Charger from 170VAC to 270VAC Reference Design

1 января 2018

A quasi-resonant isolated flyback is employed to charge two lead-acid battery elements, starting from high-line mains. The converter accepts two external signals (referred to secondary side) to provide the reference voltages, which set output voltage and current. The converter shows good wide-range efficiency thanks to valley-switching modulation.

Особенности

Low cost, low EMI isolated flyback converter thanks to valley switching Compact solution (small footprint: only 60mm x 60mm) supplies 64W maximum with almost flat efficiency (78%…89%) from 0.1A to 2A Employs a depletion-mode startup FET to further reduce standby lossses