A mathematical guideline for designing an AC-DC LLC converter with PFC

Yajie Qiu, Wenbo Liu, Peng Fang, Yan Fei Liu, Paresh C. Sen

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

8 Scopus citations

Abstract

Although LLC topology has been applied to AC-DC power supplies as a Power Factor Correction (PFC) converter in the literature, there is no publications present intuitive equations that simplify LLC designing in order to meet the PFC gain requirements. In this paper, a mathematical design guideline is derived for LLC PFC converter applications, proving that by carefully designing the resonant tank gain at parallel resonant frequency at the peak AC voltage higher than 1, its gain will meet the PFC requirement for other AC voltages and result in a successful single-stage PFC design with power factor over 0.99. The guideline is extended to offline wide input and output voltage LLC PFC applications. A 240-Watt prototype of a single-stage LLC LED driver with PFC has been built to verify the feasibility of the proposed design guideline.

Original languageEnglish (US)
Title of host publicationAPEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2001-2008
Number of pages8
ISBN (Electronic)9781538611807
DOIs
StatePublished - Apr 18 2018
Externally publishedYes
Event33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States
Duration: Mar 4 2018Mar 8 2018

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2018-March

Conference

Conference33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
CountryUnited States
CitySan Antonio
Period3/4/183/8/18

Keywords

  • AC-DC Converter
  • LLC
  • PFC
  • Resonant Converter
  • Single-Stage

Fingerprint Dive into the research topics of 'A mathematical guideline for designing an AC-DC LLC converter with PFC'. Together they form a unique fingerprint.

Cite this