Hello,

I am trying to conduct a transiet thermal analysis for a PCB with heat sink.

On the PCB I have 3 power consumers that I modeled using split lines and asigned heat power values.

When I conduct the steady state study, I get a reasonalbe result - about 190 C (never mind that the board will malfunction).

When I start the transiet study using "inital temperature" from "temperature" under thermal load I get degrees below zero.

When I start the transiet study using "initial temperature from thermal study" it seems that the transiet study takes the calculated steady state study's temperature (190 C) as the inital temperature and during the study the temperature changes slightly.

What am I doing wrong?

Tnx