A resonant LED driver with capacitive power transfer

Doron Shmilovitz, Shaul Ozeri, Mehrdad Mark Ehsani

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A quasi resonant topology suitable for LED drivers, featuring power factor correction and dimming in a single stage is presented. It contains a single active switch, and operates in zero-voltage-switching, zero-current-switching. This topology includes neither electrolytic capacitors nor transformer, and provides galvanic isolation between the AC mains and the DC side. Building on this new topology, a 15 W, 30 V, LED string driver with a typical operation frequency of 200 kHz was designed and experimented. Experimental results fully support the theoretical analysis and the simulation results. Measured efficiency exceeds 90% in the entire operation range and reached a peak efficiency of 96%. The driver is dimmable through the switching frequency. Dimming in the range of 4W-19W is demonstrated experimentally.

Original languageEnglish
Title of host publicationAPEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1384-1387
Number of pages4
ISBN (Print)9781479923250
DOIs
StatePublished - 2014
Event29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 - Fort Worth, TX, United States
Duration: 16 Mar 201420 Mar 2014

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014
Country/TerritoryUnited States
CityFort Worth, TX
Period16/03/1420/03/14

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