Does the LTspice model of CAB760M12HM3 include parameters such as Cgd, Cgs, Cds, and LStray? If so,

usxfgh

In actual testing, there were significant voltage fluctuations, but the voltage fluctuations observed in simulation were relatively small, as shown in the figure

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Bdeboi

Hello,

Yes, the model does include these parameters, but the accuracy for switching is tuned at operating voltages (600-800V). Because 20V switching is far outside of the reasonable operating point for the device, it's not a region of behavior that we focus on.

In addition, there could be many factors in your empirical setup that are not reflected in the model. For example, I see you are using a ground referenced voltage probe for your Vds measurement. The connection of your ground lead can have a significant influence on the dynamic response of the probe (ringing), especially at these lower voltages where these errors dominate relative to the actual signal (as in, a 5V error at 20V is large, but at 800V is very small). You also have to be sure that your grounding is correct - if the scope channels are grounded anywhere else in the system, you can create ground loops in your measurement.

I wouldn't worry about this too much, but you may consider inclusing some of the probe parasitics in your simulation if this discrepancy is concerning for you

Thanks,

Brian.