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 language | English |
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Title of host publication | APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition |
Publisher | Institute of Electrical and Electronics Engineers |
Pages | 1966-1973 |
Number of pages | 8 |
Volume | 2015-May |
Edition | May |
DOIs | |
Publication status | Published - 8 May 2015 |
Event | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States Duration: 15 Mar 2015 → 19 Mar 2015 |
Conference
Conference | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 |
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Country/Territory | United States |
City | Charlotte |
Period | 15/03/15 → 19/03/15 |
Keywords
- DC-to-DC
- Multi-phase buck converters
- Non-isolated
- PoL
- VRM
- ZCS
ASJC Scopus subject areas
- Electrical and Electronic Engineering