Title :
Full-range power supply based on a two-inductor resonant current-clamped (L2R-CC) DC-DC converter
Author :
Liberatore, A. ; Bartoli, M. ; Reatti, A. ; Kazimierczuk, M.K.
Author_Institution :
Dept. of Electron. Eng., Florence Univ., Italy
Abstract :
A full-range off-line power supply based on a two-inductor resonant current-clamped DC-DC converter is presented in this paper. The converter´s operation allows a zero voltage turn-on of the MOSFETs. Moreover, conduction losses are drastically reduced by the current clamping effect achieved by utilizing both the leakage and the magnetizing inductance of the transformer. As a result switching losses are nearly zero, while conduction losses are much lower than in conventional resonant inverters and a full-load high-line maximum efficiency η=86% is achieved for the entire power supply at a frequency operation in the hundreds of kilohertz range. The output voltage V0=16 V is regulated over the entire load range, that is for an output current I0 ranging from 0.2 A to 2 A and for both American and European standard input voltages
Keywords :
DC-DC power convertors; losses; power supply circuits; resonant power convertors; 0.2 to 2 A; 16 V; 86 percent; conduction losses; current-clamped DC-DC converter; full-range power supply; magnetizing inductance; switching losses; transformer leakage; two-inductor configuration; universal input power supply; Clamps; DC-DC power converters; Frequency; Inductance; MOSFETs; Magnetic resonance; Power supplies; Resonant inverters; Switching loss; Voltage;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.621852
