Title :
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
fDate :
29 Jun-3 Jul 1992
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;
Conference_Titel :
Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE
Conference_Location :
Toledo
Print_ISBN :
0-7803-0695-3
DOI :
10.1109/PESC.1992.254669
