Stability analysis of complete two-stage power-factor-correction power supplies

Octavian Dranga, Chi Kong Tse, Siu Chung Wong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)


Power-factor-correction (PFC) power supplies are required to provide high input power factor and tight output voltage regulation. The usual configuration takes a two-stage cascade structure, consisting of a PFC preregulator and a dc/dc converter. Previous studies of the dynamical behaviour mainly focused on the boost PFC preregulator, assuming that it is being terminated by a resistive load. However, in practice, as the PFC preregulator is terminated by a dc/dc converter whose characteristics differ from resistive load's, the assumption of resistive load termination gives rather inaccurate information about the stability of the system. In this paper we study the complete two-stage PFC power supply and show that the interaction between the PFC stage and the dc/dc converter stage plays an important role in determining the stability of the system.
Original languageEnglish
Title of host publicationProceedings of the 2005 European Conference on Circuit Theory and Design
Number of pages4
Publication statusPublished - 1 Dec 2005
Event2005 European Conference on Circuit Theory and Design - Cork, Ireland
Duration: 28 Aug 20052 Sep 2005


Conference2005 European Conference on Circuit Theory and Design

ASJC Scopus subject areas

  • Engineering(all)

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