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Turn-on gate voltage drop of SiC MOSFET

ZihengYuan
ZihengYuan Contributor Level 1
edited May 2024 in Discrete Products

I have constructed an H-bridge inverter with only an inductive load for power cycling. One of the legs uses the SiC MOSFET C3M0060065D. However, I have observed gate voltage drop in both the upper and lower devices of this leg at turn-on. The turn-on gate resistance is 8 ohms. The following is the adopted driving scheme and the test results. So how can I solve this problem?Thanks!

The blue line is the Vgs of the upper device, the yellow line is the Vgs of the lower device, the red line is the inductive current, and the green line is the DC voltage.

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