High efficiency DC-DC converter

Author

Jitaru, Ionel Dan ; Cocina, George

Author_Institution

Dept. of Electr. Eng., Polytechnic Inst. of Bucharest, Romania

fYear

1994

fDate

13-17 Feb 1994

Firstpage

638

Abstract

A family of power converter topologies employing two complementary switches in the primary and two MOSFET synchronous rectifiers in the secondary is presented. The use of two complementary switches in the primary leads to soft transitions across the switching elements, and the complementary square waveforms reflected in the secondary offers a simple and efficient driving waveform for the synchronous rectifiers. Employing one of these topological configurations, a very high efficiency and high power density 150 W converter was implemented. The power converter operates from an input voltage of 35 V to 72 V providing 5 V at 30 A, with an efficiency above 90% at full load. High efficiency combined with the use of a full integrated multilayer PCB magnetic technology has allowed a power density of 51 W/in³

Keywords

insulated gate field effect transistors; power convertors; power transistors; rectifiers; rectifying circuits; semiconductor switches; switching circuits; 150 W; 30 A; 35 to 72 V; 5 V; DC-DC power converter; MOSFET synchronous rectifiers; complementary switches; driving waveform; efficiency; integrated multilayer PCB magnetic technology; power density; soft switching; square waveforms; topologies; DC-DC power converters; MOSFET circuits; Rectifiers; Schottky diodes; Space technology; Switches; Thermal management; Topology; Voltage; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1994. APEC '94. Conference Proceedings 1994., Ninth Annual

Conference_Location

Orlando, FL

Print_ISBN

0-7803-1456-5

Type

conf

DOI

10.1109/APEC.1994.316338

Filename

316338