Design of Quasi-resonant flyback converter control IC with DCM and CCM operation

Kai Hui Chen, Tsorng-Juu Liang

研究成果: Conference contribution

15 引文 斯高帕斯(Scopus)

摘要

A Quasi-resonant (QR) flyback converter control IC is design and implemented. Flyback converter is applied in small to medium power rating applications mostly, due to low cost and simple circuit topology. The conventional fix frequency operated flyback converter is the most adapted power converter, but the switching losses cause lower conversion efficiency. The flyback converter can be operated in BCM and DCM by quasi-resonant control. The quasi-resonant control utilizes the resonant action between magnetize inductor of transformer and parasitic capacitor of power MOSFET to achieve valley voltage turn-on and reduce the turn on losses increasing the conversion efficiency. The switching frequency increases with reducing load, and the switching losses will cause poor efficiency. Flyback converter operated in BCM and DCM in heavy load condition will lead to higher conduction losses. To improve the conversion efficiency at light load and heavy load condition, the proposed control circuit is integrated with frequency clamp and maximum off-time limit functions.

原文English
主出版物標題2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
發行者IEEE Computer Society
頁面2750-2753
頁數4
ISBN(列印)9781479927050
DOIs
出版狀態Published - 2014 一月 1
事件7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014 - Hiroshima, Japan
持續時間: 2014 五月 182014 五月 21

出版系列

名字2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014

Other

Other7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
國家/地區Japan
城市Hiroshima
期間14-05-1814-05-21

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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