A Practical Approach to the Design of a Highly Efficient PSFB DC-DC Converter for Server Applications

Manuel Escudero, Matteo-Alessandro Kutschak, David Meneses, Noel Rodriguez and Diego P. Morales
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Manuel Escudero: Infineon Technologies Austria AG, Siemenstraße 2, 9500 Villach, Austria
Matteo-Alessandro Kutschak: Infineon Technologies Austria AG, Siemenstraße 2, 9500 Villach, Austria
David Meneses: Infineon Technologies Austria AG, Siemenstraße 2, 9500 Villach, Austria
Noel Rodriguez: Department of Electronics and Computers Technology, University of Granada, 18071 Granada, Spain
Diego P. Morales: Department of Electronics and Computers Technology, University of Granada, 18071 Granada, Spain

Energies, 2019, vol. 12, issue 19, 1-36

Abstract: The phase shift full bridge (PSFB) is a widely known isolated DC-DC converter topology commonly used in medium to high power applications, and one of the best candidates for the front-end DC-DC converter in server power supplies. Since the server power supplies consume an enormous amount of power, the most critical issue is to achieve high efficiency. Several organizations promoting electrical energy efficiency, like the 80 PLUS, keep introducing higher efficiency certifications with growing requirements extending also to light loads. The design of a high efficiency PSFB converter is a complex problem with many degrees of freedom which requires of a sufficiently accurate modeling of the losses and of efficient design criteria. In this work a losses model of the converter is proposed as well as design guidelines for the efficiency optimization of PSFB converter. The model and the criteria are tested with the redesign of an existing reference PSFB converter of 1400 W for server applications, with wide input voltage range, nominal 400 V input and 12 V output; achieving 95.85% of efficiency at 50% of the load. A new optimized prototype of PSFB was built with the same specifications, achieving a peak efficiency of 96.68% at 50% of the load.

Keywords: phase shift full bridge; server; DC-DC; design; high-efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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