Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.750467
