I need to use the best model for the MOSFET in my circuit I'm simulation on PSIM, the MOSFET is Si4108-TI-GE3.

But I am not given the parasitic capacitance values (Cgs Cds Cdg), I am only given this:

I think I should use Q=CU, but I don't see how to use Q=CU for Cds since I only have Total gate charge and I don't know if that is the drain-source charge. How do I calculate the necessary parasitic capacitance values?

## Best Answer

Read the data sheet: -

Ciss is gate-source capacitance. You should be able to work out the other two.