A novel switched-coupled-inductor DC-DC step-Up converter and its derivatives

Shih Ming Chen, Man Long Lao, Yi Hsun Hsieh, Tsorng Juu Liang, Kai Hui Chen

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)


This paper presents a novel dc-dc converter configuration, which successfully integrates two technologies, including a switched capacitor and a switched coupled inductor, into one converter. By adopting a coupled inductor to charge a switched capacitor, the voltage gain can be effectively increased, and the turns ratio of the coupled inductor can be also reduced. Not only lower conduction losses but also higher power conversion efficiency is benefited from a lower part count and lower turns ratios. The proposed converter is simply composed of six components, which can be further derived to varied converters for different purposes, such as a bidirectional converter. The operating principle and steady-state analysis are discussed in this paper. A 250-W laboratory hardware prototype is completed and verified. The voltage gain is up to 11. The highest efficiency is 97.2%, and the full-load efficiency is kept at 93.6%.

Original languageEnglish
Article number7012131
Pages (from-to)309-314
Number of pages6
JournalIEEE Transactions on Industry Applications
Issue number1
Publication statusPublished - 2015 Jan 1

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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