A multiplexing ripple cancellation LED driver with true single-stage power conversion and flicker-free operation

Peng Fang, Yan Fei Liu, Paresh C. Sen

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

Abstract

although a single-stage off-line power LED driver can achieve low cost and high efficiency, the notorious double-line-frequency flicker issue with a single-stage LED driver limits its usage in high-quality lighting applications. To solve lighting flicker, as well as maintain a low cost and high efficiency, a Multiplexing Ripple Cancellation (MRC) LED driver is proposed in this paper. One switching cycle is divided into two intervals. During the first interval, the proposed LED driver operates as a conventional LED driver that transfers energy from AC input to LED output, performs power factor correction and generates the main output voltage. The main output voltage has a double-line-frequency ripple like in a conventional design. During the second interval, the proposed LED driver transfers energy from AC input again to generate an opposite ripple voltage to cancel the ripple voltage from the main output. In this way, the voltage across LED load is a DC to achieve flicker-free LED driving performance. More than 99% of the output power goes through one-time power conversion while less than 1% goes through two-time power conversion. A 7.5W experimental prototype had been built and tested to verify the design concept.

Original languageEnglish (US)
Title of host publication34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3414-3420
Number of pages7
ISBN (Electronic)9781538683309
DOIs
StatePublished - May 24 2019
Event34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States
Duration: Mar 17 2019Mar 21 2019

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2019-March

Conference

Conference34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
CountryUnited States
CityAnaheim
Period3/17/193/21/19

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Keywords

  • Flick-free operation
  • Multiplexing operation
  • Ripple cancellation
  • Single stage

Cite this

Fang, P., Liu, Y. F., & Sen, P. C. (2019). A multiplexing ripple cancellation LED driver with true single-stage power conversion and flicker-free operation. In 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 (pp. 3414-3420). [8722000] (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2019-March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2019.8722000