Quasi-Resonant (QR) Controller With Adaptive Switching Frequency Reduction Scheme for Flyback Converter
- Title
- Quasi-Resonant (QR) Controller With Adaptive Switching Frequency Reduction Scheme for Flyback Converter
- Author
- 유창식
- Keywords
- AC-DC power conversion; power electronics; power integrated circuits
- Issue Date
- 2016-06
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v. 63, NO 6, Page. 3571-3581
- Abstract
- A quasi-resonant (QR) controller with an adaptive frequency reduction scheme has been developed for a flyback converter. While maintaining the valley switching, the QR controller reduces the switching frequency for lighter load by skipping some valleys to reduce the power loss and thereby achieve better light-load efficiency. If the QR controller cannot detect any valley due to the damped oscillation of switch voltage, then the valley switching is given up and the nonvalley switching is employed to keep reducing the switching frequency for lighter load. The proposed QR controller has been implemented in a 0.35-mu m 700-V BCDMOS process and applied to a 40-W flyback converter. The power efficiency of the flyback converter is improved by upto 3.0% when the proposed QR controller is employed compared to the one employing the conventional QR controller.
- URI
- https://ieeexplore.ieee.org/document/7401079/https://repository.hanyang.ac.kr/handle/20.500.11754/72641
- ISSN
- 0278-0046; 1557-9948
- DOI
- 10.1109/TIE.2016.2523931
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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