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

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

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

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%.

Originalspracheenglisch
TitelAPEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seiten1966-1973
Seitenumfang8
Band2015-May
AuflageMay
DOIs
PublikationsstatusVeröffentlicht - 8 Mai 2015
Veranstaltung30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, USA / Vereinigte Staaten
Dauer: 15 Mär 201519 Mär 2015

Konferenz

Konferenz30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
LandUSA / Vereinigte Staaten
OrtCharlotte
Zeitraum15/03/1519/03/15

ASJC Scopus subject areas

  • !!Electrical and Electronic Engineering

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