Ultra step-up DC-DC converter with reduced switch stress

Abbas A. Fardoun, Esam H. Ismail

Research output: Contribution to journalArticlepeer-review

192 Citations (Scopus)


In this paper, a new single-switch nonisolated dcdc converter with high voltage transfer gain and reduced semiconductor voltage stress is proposed. The proposed topology utilizes a hybrid switched-capacitor technique for providing a high voltage gain without an extreme switch duty cycle and yet enabling the use of a lower voltage and RDS-ON MOSFET switch so as to reduce cost, switch conduction, and turn-on losses. In addition, the low voltage stress across the diodes allows the use of Schottky rectifiers for alleviating the reverse-recovery current problem, leading to a further reduction in the switching, and conduction losses. The principle of operation and a comparison with other high step-up topologies are presented. Two extensions of the proposed converter are also introduced and discussed. Simulation and experimental results are also presented to demonstrate the effectiveness of the proposed scheme.

Original languageEnglish
Article number5510128
Pages (from-to)2025-2034
Number of pages10
JournalIEEE Transactions on Industry Applications
Issue number5
Publication statusPublished - Sept 2010


  • DCDC power conversion
  • high step-up converter
  • pulsewidth modulated
  • switched-mode power supplies

ASJC Scopus subject areas

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


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