Analysis and Optimization of Switched Capacitor Power Conversion Circuits With Parasitic Resistances and Inductances

Yuanmao Ye, Ka Wai Eric Cheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)


For a switched-capacitor converter (SCC) built by discrete components, its performance is inevitably influenced by parasitic resistances and stray inductances. A basic SCC unit including parasitic resistances and stray inductances behaves as an RLC series circuit operated in charging and discharging states alternatively. Hard-switching SCC with small Q factor, due to the small stray inductance, is analyzed based on overdamping RLC circuit theory. And the underdamping RLC series network is used to analyze soft-switching SCC whose Q factor is greater than 0.5. New mathematical equations are derived to evaluate the impact of parasitic resistances and inductances on the performance of SCCs. Following that, the corresponding design methodologies are proposed for both hard- and soft-switching SCCs. The effectiveness of the proposed analysis and design methods are experimentally demonstrated by a 300-W double-mode SCC prototype.
Original languageEnglish
Article number7470460
Pages (from-to)2018-2028
Number of pages11
JournalIEEE Transactions on Power Electronics
Issue number3
Publication statusPublished - 1 Mar 2017


  • Optimization
  • power converter
  • soft-switching
  • switched-capacitor circuit

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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