Modeling of capacitor impedance in switching converters

Jonathan W. Kimball, Philip T. Krein, Kevin R. Cahill

Research output: Contribution to journalArticlepeer-review


Switched capacitor (SC) converters are gaining acceptance as alternatives to traditional, inductor-based switching power converters. Proper design of SC converters requires an understanding of all loss sources and their impacts on circuit operation. In the present work, an equivalent resistance method is developed for analysis, and equivalent resistance formulae are presented for various modes of operation. Quasiresonant converters are explored and compared to standard SC converters. Comparisons to inductor-based switching power converters are made. A number of capacitor technologies are evaluated and compared for applications to both SC converters and inductor-based converters. The resulting model can be used to accurately predict and optimize converter performance in the design phase.

Original languageEnglish (US)
Pages (from-to)136-140
Number of pages5
JournalIEEE Power Electronics Letters
Issue number4
StatePublished - Dec 2005


  • Capacitor model
  • Converter model
  • Quasiresonant
  • Switched capacitor

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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