Highly Integrated ZVS Flyback Converter ICs With Pulse Transformer to Optimize U

Abstract

Flyback converter with USB power delivery is widely used for fast-charging mobile devices. However, conven- tional solutions have issues such as lower efficiency, higher cost, a large number of external components, and lower loop gain bandwidth. In this article, a high-efficiency zero-voltage switch- ing (ZVS) flyback converter with primary- and secondary-side control ICs is proposed to solve the aforementioned issues with high integration level. The proposed control replaces optocou- pler to achie