A novel design of high step-down non-isolated DC/DC converter

Ashwin Chandwani, Ayan Mallik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a high-gain DC/DC buck-derived converter topology, utilizing two active power semiconductors. Unlike many other multi-stage high step-down DC/DC converters, this topology uses relatively a smaller number of passive LC components. Due to the duty cycle limitation and deadtime constraints, high gain factor (more than 10) is very challenging to be achieved in a single-stage regular buck DC/DC converter. In the proposed converter, the net voltage gain is a nonlinear function of duty-cycles of the power devices, which produces step-down gain of 10 to 15 without pushing the duty cycles towards their extremums. For the concept verification of the converter operation, a voltage conversion from 48V to 1V DC at 200W using the proposed converter topology is simulated in MATLAB environment. An output voltage ripple of ±1% and a conversion efficiency of 94% are achieved according to the obtained results. Dynamic performance of the converter is also studied by implementing closed loop control using various control strategies. The converter is designed considering all the relevant conditions required for a typical Point of Load (PoL) application.

Original languageEnglish (US)
Title of host publication9th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728156729
DOIs
StatePublished - Dec 16 2020
Externally publishedYes
Event9th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2020 - Jaipur, India
Duration: Dec 16 2020Dec 19 2020

Publication series

Name9th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2020

Conference

Conference9th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2020
CountryIndia
CityJaipur
Period12/16/2012/19/20

Keywords

  • Datacenter
  • DC-DC converter
  • High gain
  • PoL applications
  • Power supplies
  • Resonant converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Automotive Engineering

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