Analysis and design of a zero current switched quasi-resonant converter with synchronous rectification for low output voltage applications

Author

de Hoz, A. ; de la Cruz, E.

Author_Institution

Alcatel Stand. Electr. S.A., Madrid, Spain

fYear

1992

fDate

29 Jun-3 Jul 1992

Firstpage

221

Abstract

An analysis of a zero-current-switched quasi-resonant power converter (ZCS-QRC) including the effects of a finite magnetizing inductance is presented. The resulting topology seems to be very useful for the implementation of synchronous rectification techniques in a nondissipative way, allowing high-frequency operation. A design guideline based on the design procedure developed is given. Simulation and experimental results show very good performance in terms of high efficiency for low output voltage and high output current applications. Experimental results for two different output conditions (5 V/20 A and 3.3 V/20 A) are presented. Both converters work at a nominal switching frequency of 250 kHz, achieving a very good trade-off between efficiency and size

Keywords

network synthesis; power convertors; rectification; switching circuits; 20 A; 250 kHz; 3.3 V; 5 V; HF; LV; ZCS; applications; design; efficiency; finite magnetizing inductance; performance; quasi-resonant power converter; switching frequency; synchronous rectification; DC-DC power converters; Low voltage; Parasitic capacitance; Pulse width modulation; Rectifiers; Resonance; Strontium; Switches; Switching converters; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE

Conference_Location

Toledo

Print_ISBN

0-7803-0695-3

Type

conf

DOI

10.1109/PESC.1992.254669

Filename

254669