A battery-powered, highly efficient, single-ended forward converter with new driving method for synchronous rectifier

Author

Serada, Takuji ; Tsukamoto, Kazuo ; Sakai, Tatsuo ; Yachi, Toshiaki

Author_Institution

NTT Integrated Inf. & Energy Syst. Labs., Tokyo, Japan

Volume

2

fYear

1999

fDate

14-18 Mar 1999

Firstpage

847

Abstract

A compact and highly efficient nonisolated step-up/step-down converter is described for battery input and low-output voltage applications. The circuit has a single-ended forward converter with synchronous rectifiers that are driven using a new driving method. The new method uses the drain voltage of the main switch to drive the freewheeling MOSFET. Experimental results are presented for a converter with an input voltage range of 0.9 to 1.65 V, an output voltage of 1.6 V and a load current of up to 200 mA. A maximum overall efficiency of 78% was obtained experimentally by using the new driving method in a freewheeling synchronous rectifier

Keywords

DC-DC power convertors; MOSFET; driver circuits; rectifying circuits; 0.9 to 1.65 V; 200 mA; 78 percent; battery input; drain voltage; driving method; freewheeling MOSFET drive; load current; low-output voltage; nonisolated step-up/step-down converter; overall efficiency; single-ended forward converter; synchronous rectifier; Batteries; Energy consumption; MOSFET circuits; Rectifiers; Switches; Switching converters; Switching frequency; Telephony; Threshold voltage; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual

Conference_Location

Dallas, TX

Print_ISBN

0-7803-5160-6

Type

conf

DOI

10.1109/APEC.1999.750467

Filename

750467