An improved self-driven synchronous rectifier for high efficiency dimmable LED lighting applications

Conference proceedings article

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Publication Details

Author list: Mujjalinvimut E., Ayudhya P.N.N., Sangswang A.

Publisher: Hindawi

Publication year: 2014

Start page: 4166

End page: 4170

Number of pages: 5

ISBN: 9781479940325

ISSN: 0146-9428

eISSN: 1745-4557

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949928254&doi=10.1109%2fIECON.2014.7049128&partnerID=40&md5=d599ffe79d686459c810605e0e39c9eb

Languages: English-Great Britain (EN-GB)

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Abstract

This paper presents an asymmetrical half bridge (AHB) converter for dimming low-voltage high-current LED lighting application. An improved driving circuit of a self-driven (SD) synchronous rectification (SR) is proposed for switching loss reduction at the secondary of the transformer. The control circuit is designed such that the SR MOSFET switch operates under zero-voltage switching (ZVS) mode while the driving signals are always within the acceptable voltage limits under duty cycle variations of the LED dimming applications. Experimental results obtained from a 60-W prototype have shown that the switches operate under ZVS throughout all operating region where the highest efficiency of the AHB converter is at 96.4%. ฉ 2014 IEEE.

Keywords

Asymmetrical half-bridge converter, Self-driven synchronous rectifier, Two stage converter