PWM Power Supply Using SiC RESURF JFETs with High Speed Switching

Satoshi Hatsukawa; Takashi Tsuno; Kazuhiro Fujikawa; Nobuo Shiga; Tuya  Wuren; Kazuyuki Wada; Takashi Ohira

doi:10.4028/www.scientific.net/MSF.740-742.1056

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PWM Power Supply Using SiC RESURF JFETs with High Speed Switching

Abstract:

400V/2.5A 4H-SiC JFETs, having a reduced surface field (RESURF) structure have been fabricated. Measurements on the on-resistance, blocking, and switching characteristics were carried out. It was confirmed that the JFET has fast switching characteristics. A demonstration of a Pulse Width Modulation (PWM) decoder using JFETs was carried out. The input waveform, which is pulse width modulated 20.5MHz at 4.1MHz sine wave, as able to be decoded at 4.1MHz sine wave.