Snubber RC Optimization

How to optimize device snubber RC value?

We have user guides to help start with. Our spice model can also provide initial insights. By textbook, you will need to put a first round of snubber capacitance across DS to check the parasitic inductance in PCB. This information can be extracted from the ringing frequency after the turn-off Vds spike before and after the first-round capacitance. Then design RC based on the known parasitic inductance. But this method works for fixed operating condition – load current. In practice, if application covers a fair amount of load ranges, trial and error is easier to implement.
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