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

Kai Hui Chen, Tsorng-Juu Liang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publication2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
PublisherIEEE Computer Society
Pages2750-2753
Number of pages4
ISBN (Print)9781479927050
DOIs
Publication statusPublished - 2014 Jan 1
Event7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014 - Hiroshima, Japan
Duration: 2014 May 182014 May 21

Publication series

Name2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014

Other

Other7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
CountryJapan
CityHiroshima
Period14-05-1814-05-21

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Design of Quasi-resonant flyback converter control IC with DCM and CCM operation'. Together they form a unique fingerprint.

  • Cite this

    Chen, K. H., & Liang, T-J. (2014). Design of Quasi-resonant flyback converter control IC with DCM and CCM operation. In 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014 (pp. 2750-2753). [6869979] (2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014). IEEE Computer Society. https://doi.org/10.1109/IPEC.2014.6869979