Switched Capacitor DC-DC Converters: A Survey on the Main Topologies, Design Characteristics, and Applications

Alencar Franco de Souza, Fernando Lessa Tofoli and Enio Roberto Ribeiro
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Alencar Franco de Souza: Institute of System Engineering and Information Technology, Federal University of Itajubá, Itajubá 37500-903, Brazil
Fernando Lessa Tofoli: Department of Electrical Engineering, Federal University of São João del-Rei, São João del-Rei 36307-352, Brazil
Enio Roberto Ribeiro: Institute of System Engineering and Information Technology, Federal University of Itajubá, Itajubá 37500-903, Brazil

Energies, 2021, vol. 14, issue 8, 1-33

Abstract: This work presents a review of the main topologies of switched capacitors (SCs) used in DC-DC power conversion. Initially, the basic configurations are analyzed, that is, voltage doubler, series-parallel, Dickson, Fibonacci, and ladder. Some aspects regarding the choice of semiconductors and capacitors used in the circuits are addressed, as well their impact on the converter behavior. The operation of the structures in terms of full charge, partial charge, and no charge conditions is investigated. It is worth mentioning that these aspects directly influence the converter design and performance in terms of efficiency. Since voltage regulation is an inherent difficulty with SC converters, some control methods are presented for this purpose. Finally, some practical applications and the possibility of designing DC-DC converters for higher power levels are analyzed.

Keywords: DC-DC converters; integrated circuits; low-power electronics; semiconductors; switched capacitors (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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