Intermittent chaotic operation in switching power converters

Siu Chung Wong, Chi Kong Tse, K. C. Tam

Research output: Journal article publicationReview articleAcademic researchpeer-review

24 Citations (Scopus)


In the process of designing and constructing switching power converters, chaotic operations are often observed intermittently between long periods of regular operations. In practice, such intermittent chaotic operations can be eliminated by incorporating appropriate design measures to combat interference of spurious signals. In this paper, we explain the mechanism that causes "intermittent" chaos in a popular type of switching converters, namely, current-mode controlled switching converters. The circuit model used to study the phenomenon incorporates a coupling process through which a spurious signal is coupled to the current sensing and ramp compensation circuitry, resulting in a modulation of the compensation slope which causes the system to become unstable intermittently. We show that coupling of spurious signals into the compensation ramp can cause intermittent chaotic or subharmonic operations.
Original languageEnglish
Pages (from-to)2971-2978
Number of pages8
JournalInternational Journal of Bifurcation and Chaos in Applied Sciences and Engineering
Issue number8
Publication statusPublished - 1 Jan 2004


  • Current-mode control
  • Intermittent chaos
  • Switching power converters

ASJC Scopus subject areas

  • Modelling and Simulation
  • Applied Mathematics


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