The test circuit used up to this point uses an clamped current source load. This means that the turn on and turn off energy is measured at the same current, in this case 10A. This is a bit unrealistic as a real power converter has inductor ripple current, and the current levels at turn-on and off will not be the same.

This circuit was used because:

Now that we have proven that SIMPLIS can model the switching losses as accurately as SPICE, we will use SIMPLIS to simulate a closed loop power converter.