Title :
MOSFET synchronous rectifier with saturable transformer commutation for high frequency converters
Author :
Sakai, Eiji ; Nakamura, Seiji ; Sakamoto, Hiroshi ; Harada, Koosuke
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
A method of obtaining high efficiency in high frequency power converters of low voltage output is presented, where a MOSFET synchronous rectifier is combined with a saturable transformer for commutation. By this method, switching losses and switching surges due to the parasitic capacitance and the parasitic diode of MOSFET are reduced. The results of experiments on a power converter of 3 V output at f = 500 kHz show that the efficiency is greatly improved with this method
Keywords :
AC-DC power convertors; commutation; field effect transistor switches; high-frequency transformers; power MOSFET; power field effect transistors; power semiconductor switches; power transformers; rectifiers; rectifying circuits; switching circuits; 3 V; 500 kHz; HF; MOSFET synchronous rectifier; efficiency; high frequency power converters; parasitic capacitance; parasitic diode; saturable transformer commutation; switching losses; switching surges; Circuit faults; Frequency conversion; MOSFET circuits; Power MOSFET; Rectifiers; Schottky diodes; Strontium; Surges; Switching converters; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-1243-0
DOI :
10.1109/PESC.1993.472045
