Patent ID: 8487667
Filing Date: 2013-07-16
Classification: H03K

Abstract:
1. A hybrid power device comprising: a hybrid power FET formed of a normally-on type SiC-JFET and a normally-off type Si-MOSFET, which are cascode-connected with a source of the SiC-JFET and a drain of the Si-MOSFET being connected to each other; and a control circuit part connected to a gate of the SiC-JFET for varying a gate current and a gate voltage of the SiC-JFET in a switching period of the hybrid power FET thereby to control a switching speed of the hybrid power FET to first switching speed in a former part of the switching period and to a second switching speed lower than the first switching speed in a latter part of the switching period, respectively, wherein the control circuit part includes: wherein the capacitor is connected in parallel to the speed regulating resistor.