Bridgeless PFC SEPIC rectifier with extended gain for universal input voltage applications

Ahmed M. Al Gabri, Abbas A. Fardoun, Esam H. Ismail

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

5 Citations (Scopus)


In this paper, a new single phase ac-dc PFC bridgeless rectifier with multiplier stage to improve the efficiency at low input voltage and reduce the switch-voltage stress, is introduced. The absence of an input rectifier bridge in the proposed rectifier and the presence of only two semiconductor switches in the current flowing path during each switching cycle result in less conduction losses and improved thermal management compared to the conventional full bridge topology. Lower switch voltage stress allows utilizing a Mosfet with lower RDs-on. The proposed topology is designed to operate in discontinuous conduction mode (DCM) to achieve almost a unity power factor and low total harmonic distortion (THD) of the input current. The DCM operation gives additional advantages such as: zero-current turn-on in the power switches and simple control circuitry. The proposed topology is compared with modified full-bridge SEPIC rectifier in terms of efficiency, total harmonic distortion (THD), and power factor. Detailed converter analysis, small signal model and closed loop analysis are presented. Experimental results for a 200 W/400 Vdc at universal line voltage range to evaluate the performance of the proposed bridgeless PFC rectifiers are detailed.

Original languageEnglish
Title of host publicationIECON Proceedings (Industrial Electronics Conference)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Electronic)9781479940325
Publication statusPublished - Feb 24 2014

Publication series

NameIECON Proceedings (Industrial Electronics Conference)


  • AC-DC power converter
  • Bridgeless rectifier
  • Discontinuous current mode (DCM)
  • Power conversion harmonics
  • Power factor correction
  • SEPIC rectifier
  • Total harmonics distortion (THD)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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