A single stage 54V to 1.8V multi-phase cascaded buck voltage regulator module

K. K. Leong, G. Deboy, K. Krischan, A. Muetze

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

Abstract

This paper proposes a new design approach to the conventional two stages solution to convert the 48-60V low voltage bus to the 1-1.8V point of load (PoL) voltage for microprocessors in large telecoms server farms. The core idea is to stack or cascade the buck voltage regulator module (VRM) input voltage in series and connect their output in parallel. This single stage multi-phase cascaded buck (MCB) VRM has a large degree of design freedom depending on the load requirements. A 150W 6-phase MCB (two 3 phase modules in parallel) achieved a maximum efficiency of 91.3% in simulation. This paper also presents the results of a demonstrator of the same circuit which achieved a measured peak efficiency of 90.1%.

Original languageEnglish
Title of host publicationAPEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers
Pages1966-1973
Number of pages8
Volume2015-May
EditionMay
DOIs
Publication statusPublished - 8 May 2015
Event30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States
Duration: 15 Mar 201519 Mar 2015

Conference

Conference30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
CountryUnited States
CityCharlotte
Period15/03/1519/03/15

Keywords

  • DC-to-DC
  • Multi-phase buck converters
  • Non-isolated
  • PoL
  • VRM
  • ZCS

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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