Analysis of High-Power Switched-Capacitor Converter Regulation Based on Charge-Balance Transient-Calculation Method

Bin Wu, Shouxiang Li, Keyue Ma Smedley, Sigmond Singer

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Switched-capacitor (SC) converters were initially introduced for low-power applications and monolithic integration. In recent years, SC converter has found high-power applications. However, voltage regulation remains an issue. This paper addresses regulation challenges for high-power SC converters, based on charge-balance transient-calculation (CT) modeling method and peak current stress estimation. With the help of CT model, due to its accuracy and comprehensive relationship, circuit and control parameters' impacts on regulation become straightforward and concerns on components stresses can be addressed quantitatively. The suitability of CT method for regulation analysis is confirmed by comparison with traditional modeling methods. The CT method is used in a 1-kW 3X two-switch boosting switched-capacitor converter (TBSC) circuit for steady-state analysis and current stress estimation. The soft rising input current and nature interleaving properties of 3X TBSC make it well suited for high-power application. Finally, the small-signal model of the 3X TBSC is developed and a closed-loop operation is achieved under 1 kW power rating.

Original languageEnglish
Article number7182330
Pages (from-to)3482-3494
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number5
StatePublished - May 2016


FundersFunder number
Bloom's Syndrome Foundation2011507


    • CT modeling
    • peak current stress
    • switched capacitor (SC)
    • two-switch boosting switched-capacitor converter (TBSC)
    • voltage regulation


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