Resonant Switched-capacitor Auxiliary Circuit for Active Power Decoupling in Electrolytic Capacitor-less AC/DC LED Drivers

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review

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Author(s)

  • Zhenyu Shan
  • Xiaomei Chen
  • Shengwen Fan
  • Guofeng Yuan
  • Chi K. Tse

Detail(s)

Original languageEnglish
Title of host publicationProceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
PublisherIEEE
Pages866-871
ISBN (Electronic)9781728103952
ISBN (Print)9781728103969
Publication statusPublished - Sep 2019
Externally publishedYes

Publication series

NameIEEE Energy Conversion Congress and Exposition, ECCE

Conference

Title11th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2019)
PlaceUnited States
CityBaltimore
Period29 September - 3 October 2019

Abstract

This paper introduces an auxiliary circuit that is used to buffer double-line-frequency ripple power and form electrolytic capacitor-less single-phase AC/DC LED drivers. The proposed auxiliary circuit is implemented by a resonant switched capacitor circuit behaving as a gyrator circuit, namely a voltage-dependent current source. The output current of the auxiliary circuit is regulated with constant on-time and hysteresis control schemes. Comparing with other alternative methods, the proposed auxiliary circuit has less power loss due to its zero-current switching (ZCS) operation, and includes smaller passive components because of its higher operating frequency (about 3 MHz). An LED driver prototype with the proposed auxiliary circuit is built, and the experimental results are given to verify the proposed topology and the parameter design.

Research Area(s)

  • ac–dc power conversion, ripple power decoupling, electrolytic capacitor less, LED driver, esonant switched-capacitor circuit

Citation Format(s)

Resonant Switched-capacitor Auxiliary Circuit for Active Power Decoupling in Electrolytic Capacitor-less AC/DC LED Drivers. / Zhenyu Shan; Xiaomei Chen; Shengwen Fan et al.

Proceedings of 2019 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2019. p. 866-871 8912977 (IEEE Energy Conversion Congress and Exposition, ECCE).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)peer-review