Clamp mode forward ZVS-MRC with self-driven synchronous rectifier

Author

Ahn, K.S. ; Kim, H.J. ; Kim, C.S. ; Sun, Y.S.

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea

fYear

1996

fDate

6-10 Oct 1996

Firstpage

470

Lastpage

475

Abstract

The clamped-mode (CM) forward zero-voltage-switching multi-resonant power converter (ZVS-MRC) with a self-driven synchronous rectifier is studied. The loss at the synchronous rectification stage of the power converter is analyzed and compared with the loss at the conventional Schottky diode rectification stage of the power converter. From the results of the analysis, it is known that the use of MOSFETs as a synchronous rectifier effectively reduces the loss at the rectification stage over the whole load range. In order to verify the validity of the analysis, the authors have built a 33 W (3.3 V/10 A) CM forward ZVS-MRC with a self-driven synchronous rectifier, with a switching frequency of 1 MHz, and tested its performance. From these experimental results, synchronous rectification achieved about a 3 W improvement in losses at the rectification stage and about 3% in the efficiency of the power converter as compared with conventional Schottky diode rectification

Keywords

AC-DC power convertors; field effect transistor switches; power MOSFET; power field effect transistors; power semiconductor switches; rectifying circuits; resonant power convertors; switching circuits; 10 A; 3.3 V; 33 W; circuit losses; clamped-mode forward ZVS multi-resonant power converter; power MOSFET switches; rectification stage; self-driven synchronous rectifier; switching frequency; Automatic testing; Clamps; MOSFETs; Rectifiers; Resonance; Schottky diodes; Switches; Switching converters; Threshold voltage; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 1996. INTELEC '96., 18th International

Conference_Location

Boston, MA

Print_ISBN

0-7803-3507-4

Type

conf

DOI

10.1109/INTLEC.1996.573366

Filename

573366