Step-up/step-down DC-DC converter with near zero input/output current ripples

Esam H. Ismail, Abbas A. Fardoun, Adel A. Zerai

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A novel single switch two diode wide conversion ratio step down/up converter is presented. The proposed converter is derived from the conventional single-ended primary inductor converter (SEPIC) topology, and it can operate as a capacitor-diode voltage multiplier, which offers simple structure, reduced electromagnetic interference (EMI), and reduced semiconductor voltage stress. The main advantages of the proposed converter are the continuous input/output current, higher voltage conversion ratio, and near-zero input and output current ripples compared with the conventional SEPIC converter. The absence of both a transformer and an extreme duty cycle permits the proposed converter to operate at high switching frequencies. Hence, the overall advantages will be: higher efficiency, reduced size and weight, simpler structure and control. The theoretical analysis results obtained with the proposed structure are compared with the conventional SEPIC topology. The performance of the proposed converter is verified through computer simulations and experimental results.

Original languageEnglish
Pages (from-to)358-375
Number of pages18
JournalInternational Journal of Circuit Theory and Applications
Issue number4
Publication statusPublished - Apr 2014


  • DC-DC power conversion
  • coupled inductors
  • switched capacitor
  • switched mode power supplies

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


Dive into the research topics of 'Step-up/step-down DC-DC converter with near zero input/output current ripples'. Together they form a unique fingerprint.

Cite this