Referenced Items are not available for this document.
A highly efficient light-emitting-diode back-light power supply is proposed for liquid-crystal display. The proposed power supply consists of a bridgeless boost rectifier for power-factor correction and the asymmetrical half-bridge flyback converter with synchronous rectifier (SR) for DC-DC power conversion. In the proposed bridgeless boost rectifier, the diode reverse-recovery losses are reduced by achieving zero-current turn-off of the output diodes, as well as zero-current turn-on of the additional diodes. The reverse-recovery transients of the diodes are improved by a simple passive snubber circuit. For a DC-DC converter, the asymmetrical half-bridge flyback converter operates under zero-voltage switching for the power switches, and the SR switch operates under zero-current switching. The analysis of the proposed converter is presented and its design considerations are discussed in detail. Experimental results based on 28 V, 300 W back-light power are provided to demonstrate the performance of the proposed converter
Published in:
Electric Power Applications, IET
(Volume:1
,
Issue:
2
)
Date of Publication: March 2007
- Page(s):
- 133 - 142
- ISSN :
- 1751-8660
- INSPEC Accession Number:
- 9448776
- Digital Object Identifier :
- 10.1049/iet-epa:20060222
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 29 May 2007
- Issue Date :
- March 2007
- Sponsored by :
- Institution of Engineering and Technology
About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies
A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2013 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.
