Normally-On devices and circuits, SiC and high temperature: using SiC JFETs in power converters

Conference: CIPS 2008 - 5th International Conference on Integrated Power Electronics Systems
03/11/2008 - 03/13/2008 at Nuremberg, Germany

Proceedings: CIPS 2008

Pages: 7Language: englishTyp: PDF

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Bergogne, Dominique; Morel, Hervé; Tournier, Dominique; Allard, Bruno; Planson, Dominique; Raynaud, Christophe; Lazar, Mihai (AMPERE, INSA-Lyon, F-69621, France)

SiC is compared on a physical basis to Si. SiC devices offer lower On-resistance and operating temperatures over 300deg C. It is shown that inverters using normally-On power switches do not differ from inverters based on normally-Off devices when the gate driver is taken into account. Basic building blocs ofa Gate driver are proposed using solely SiC Normally-On JFETs. Principal issues with SiC JFET power converters are listed.