Interleaved active clamp forward converter with additional series-connected secondary windings for wide input and high current output applications

This paper presents a new interleaved active clamp forward converter for wide input and high current output applications. The operating duty ratio can be extended over 0.5 by using additional series-connected secondary windings from each transformer. All secondary switches are operated without floating gate driver, which results in low circuit complexity and high power density. The validity of this proposed converter is confirmed by the experimental results from 36V–72V input and 12V/500W output for DC/DC prototype.