Fast-scale instability of single-stage power-factor-correction power supplies

Xiaoqun Wu, Chi Kong Tse, Octovian Dranga, Junan Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

59 Citations (Scopus)


This paper describes the fast-scale bifurcation phenomena of a single-stage power-factor-correction (PFC) power supply which is a cost effective design for low-power applications. The circuit employs a cascade configuration of a boost converter and a forward converter, which share an active switch and operate in discontinuous conduction mode, to provide input PFC and tight output regulation. Main results are illustrated by "exact" circuit simulations as well as theoretical analysis based on the use of Jacobians. This work provides a convenient means of predicting stability boundaries which can facilitate the selection of practical parameter values for maintaining stable operation.
Original languageEnglish
Pages (from-to)204-213
Number of pages10
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number1
Publication statusPublished - 1 Jan 2006


  • Bifurcation
  • Dc-dc converter
  • Instability
  • Power factor correction (PFC)
  • Single-stage converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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