Bifurcations in current-programmed DC/DC buck switching regulators - Conjecturing a universal bifurcation path

William C.Y. Chan, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


This paper studies the bifurcation paths exhibited by a DC/DC buck switching regulator under current-programmed control. Previous studies with the boost converter and the Cuk converter have shown that two distinct types of bifurcation paths, namely one that goes through a region of quasi-periodic orbits and via period-doubling, are possible. We conjecture that these two different types of bifurcation paths are part of another bifurcation in which the quasi-periodic sequence transmutes into the period-doubling sequence, and that such a bifurcation is characteristic of current-programmed DC/DC converters. In this paper we demonstrate that such a universal phenomenon is manifested in the current-programmed buck switching regulator. We shall derive the describing iterative map in closed form and use it to develop the main results via a series of computer experiments. The characteristic multipliers are calculated and the first on-set of flip-bifurcation is predicted Computer simulations from the 'exact' model verify the results. The exhibition of quasi-periodic orbits is confirmed by computation of the Lyapunov exponent Finally, a series of return maps are generated to provide an alternative viewpoint to the reported bifurcations in terms of a transmutation from a tent-like map to a logistic-like map.
Original languageEnglish
Pages (from-to)127-145
Number of pages19
JournalInternational Journal of Circuit Theory and Applications
Issue number2
Publication statusPublished - 1 Jan 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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