Hi everyone, I created a circuit which contains ; -1 input,4 isolated output SMPS for sic mosfet driver power supply. -6 SiC mosfet , 6 schootky diode. -4 United-chemicon Al-Elct. capacitors as 2 series and 2 parallels.Thus Vmax=900V Totalcap=1mF -mosfet model: Littelfuse LSIC1MO120E0080 I'am trying my circuit part by part, Now I just set-up one driver one mosfet , four capacitors and smps rails. In attachments, I shared my inverter stage. I just put 37R load from terminal A to DC- terminal, I charged to my capacitors around 30V and I applied 100us one pulse to mosfet. I'am adding scope picture. Yellow:3.3V primary firing signal, Purple:Vgs, Green:Vds, Why my Vds voltage is ringing like that ? The ringing time is about 60us and this is so huge ? Actually Thats different from ringing effect. I also charged my capacitors to 330VDC but I saw the same kind of waveform with increased magnitude of course. Do you have an idea about that ? Really need help. If you have questions ask me please. Thank you.