A Novel Noncomplementary Active Clamp Flyback Control Technique

Abstract

This paper proposes an innovative non-complementary control method for an active clamp flyback converter. The proposed method recovers the leakage inductance energy and achieves soft switching for all the switches, while obtaining a lower RMS current compared to previous complementary or noncomplementary active clamp flyback control methods. In order to improve power density while reducing the profile of the transformer, a planar transformer with PCB-litz windings is developed for this converter.