I'm trying to simulate the efficiency of an IGBT driven power module. With Pin=Pout+Ploss, the efficiency could be calculated as:
As you can see in the model attached, I tried both ways with different models. At first using an ideal switch, then an IGBT with linear loss model (Vf and Ron), then with a thermal description, and finally with both combined. The maximum difference between calculated accuracies is about 1%, which is quite a bit.
So my question is: Which of the described ways is most accurate one?
Thanks in advance