Comparative Analysis of Steady-State Models for a Switched Capacitor Converter

Bin Wu, Laili Wang, Lei Yang, Keyue Ma Smedley, Sigmond Singer

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A recently reported modeling methods for a switched capacitor converter either assume output as 'firm' voltage or a resistor to facilitate calculation. When the size of output filter capacitor is moderate, accompanied by noticeable output ripple, previous modeling results may not provide accurate prediction and design guidelines. In this paper, a new modeling technique taking into account the output capacitor effect is proposed for simple dual-phase switched capacitor converters without complex coupling loops. The proposed model employs transient calculation, takes charge redistribution phase into account, and includes the duty cycle, switching frequency as well as output capacitor simultaneously in the final output impedance formula, which enhances accuracy of the model. It is suitable for interleaved and noninterleaved switched capacitor converters. The simulation and experimental results for the unity gain SC converter are provided to verify the proposed theory.

Original languageEnglish
Article number7444200
Pages (from-to)1186-1197
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number2
StatePublished - Feb 2017


  • Charge redistribution
  • steady state
  • switched-capacitor (SC) converter
  • transient calculation


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