Hello,
I have attached a tutorial on how to use the PLECS thermal modeling domain of PLECS. Of course, every datasheet is different and may require certain calculations, assumptions, etc., but this provides you a guide on how to get started. You should also look for app notes from the respective manufacturers on how to calculate losses for their devices. Let me know if you have any specific questions and I can try and help.
Regards,
Kris
Thermal_Advanced.zip (1 MB)