10.57647/j.mjee.2025.16967

An Interleaved Step-up DC-DC Converter with Lossless Snubber

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  • Arman Hovsep1,
  • Majid Delshad*1,
  • Bahador Fani1,
  • Mahdi Sajadieh2,
  1. Department of Electrical Engineering, Isf.C., Islamic Azad University, Isfahan, Iran
  2. Islamic Azad University, Isfahan

Received: 2025-03-29

Revised: 2025-04-18

Accepted: 2025-05-25

Copyright (c) 2025 Arman Hovsep, Majid Delshad, Bahador Fani, Mahdi Sajadieh (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Hovsep, A., Delshad, M., Fani, B., & Sajadieh, M. An Interleaved Step-up DC-DC Converter with Lossless Snubber. Majlesi Journal of Electrical Engineering. https://doi.org/10.57647/j.mjee.2025.16967
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Abstract

In this paper, an interleaved step-up converter with two lossless snubbers is introduced, where the snubbers ensure zero-current switching for the main switches, eliminating the need for extra switches. Additionally, the energy from the snubbers is transferred to the output. All the switches in the converter are grounded, which negates the requirement for an isolated driver circuit. Another key characteristic of the converter is the balanced current across both phases. Moreover, the low voltage stress on the switches allows for the use of switches with lower drain-source resistance. The proposed converter has been thoroughly analyzed, and to validate the theoretical analysis, a prototype was simulated in PSPICE software and a 100W prototype was fabricated. The efficiency at full load is 96%, showing a 5% improvement compared to its hard-switching counterpart.

Keywords

  • Step-up converter,
  • Lossless snubber,
  • Zero-voltage switching,
  • Zero-current switching
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