Modelling and Control of a Novel High Step-down 48V-1V DC-DC Converter

Ashwin Chandwani, Ayan Mallik

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

Abstract

This paper proposes a novel non-isolated buck- derived resonant DC-DC converter topology that achieves a significantly high step-down gain. Because of the limitations pertaining to the duty cycle limits and constraints related to minimum deadtime requirements that result in reduced efficiency and higher peak stress on power components, it is difficult to attain high step-down with a normal single switch buck converter. Multistage buck-derived topologies, including a greater number of active power devices, make the converter complex and inefficient in many cases. In this work, a novel circuit structure is proposed, that achieves a very high step-down gain without pushing duty cycles to the extreme limits, resulting in an efficient power conversion, making it very relevant to datacenters and point of load applications. To characterize the converter, state space averaging formulation is utilized, and corresponding gain plots have been presented. To examine the converter performance and closed loop performance, the converter is simulated for 200W load in MATLAB/Simulink, and it exhibits over 94% efficiency and 10ms settling time under 50% step change in load power. In addition to that, experimental results are also included for a laboratory proof-of-concept hardware prototype.

Original languageEnglish (US)
Title of host publicationProceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages708-713
Number of pages6
ISBN (Electronic)9781728163444
DOIs
StatePublished - May 24 2021
Event12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021 - Virtual, Singapore, Singapore
Duration: May 24 2021May 27 2021

Publication series

NameProceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021

Conference

Conference12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Country/TerritorySingapore
CityVirtual, Singapore
Period5/24/215/27/21

Keywords

  • datacenter
  • DC-DC topology
  • high gain
  • point-of-load
  • Resonance
  • voltage regulator

ASJC Scopus subject areas

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

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