Title :
A high-voltage-input converter operating at 200 kHz
Author :
Ohtsu, Satoshi ; Ishii, Hisao ; Yamashita, Takashi ; Sugiura, Toshiyuki
Author_Institution :
NTT Corp., Tokyo, Japan
Abstract :
A circuit and a transformer structure for a high-voltage input converter operating at a high switching frequency are described. A two-MOSFET forward converter is suitable for a high-voltage-input converter. To increase the switching frequency, the reset time of the transformer core flux must be reduced. Increasing the transformer flyback voltage and reducing its stray capacitance are effective in decreasing the rest time without increasing power loss. A two-MOSFET forward converter for increasing the flyback voltage and a transformer structure for reducing the stray capacitance are proposed. The converter using this transformer provides the basis for a 48 V 100 W output 270 V input converter operating at 200 kHz with a high efficiency of above 95%
Keywords :
power convertors; 100 W; 2-MOSFET forward convertor; 200 kHz; 270 V; 48 V; 95 percent; HV input convertor; reset time; stray capacitance; switching frequency; transformer core flux; transformer flyback voltage; Capacitance; Diodes; Inductance; MOSFET circuits; Magnetic flux; Power MOSFET; Power supplies; Rectifiers; Switching frequency; Transformer cores;
Conference_Titel :
Telecommunications Energy Conference, 1991. INTELEC '91., 13th International
Conference_Location :
Kyoto
Print_ISBN :
0-87942-670-5
DOI :
10.1109/INTLEC.1991.172382
