A high efficiency gate-driving scheme of synchronous rectifiers in Wide-Input-Voltage-Range CCM Flyback Converter

Author

Weiming Lin ; HuiQi Song ; Zengyi Lu ; Hua, Guang

Author_Institution

Coll. of Electr. Eng. & Autom., Fuzhou Univ.

fYear

2006

fDate

18-22 June 2006

Firstpage

1

Lastpage

6

Abstract

A new gate-driver scheme is proposed in this paper to improve the efficiency of the synchronous rectifiers in wide-input-voltage range flyback converter. The proposed new gate-driver scheme bases on the auxiliary windings and an additional control switch, which connects in parallels with the flyback main circuits and synchronous rectifier. The driving signals are synchronized properly through the auxiliary windings of the power transformer can optimize MOSFET turn-on and turn-off delays in synchronous rectifiers. The driving signal prevents the MOSFET body-diode to conduct and continuously adjusts to minimize the cross-conduction time interval. The operation principle and experiment results are presented in this paper

Keywords

driver circuits; power MOSFET; power convertors; power transformers; rectifiers; transformer windings; CCM flyback converter; MOSFET; auxiliary windings; body-diode; control switch; cross-conduction time interval; gate-driving scheme; power transformer; synchronous rectifiers; turn-off delays; turn-on delays; wide-input-voltage range flyback converter; Delay; MOSFET circuits; Power MOSFET; Power transformers; Rectifiers; Strontium; Switches; Switching circuits; Topology; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE

Conference_Location

Jeju

ISSN

0275-9306

Print_ISBN

0-7803-9716-9

Type

conf

DOI

10.1109/PESC.2006.1711880

Filename

1711880