I have a transient thermal model of a PCB with intitial temperature at 50 Celcius.
There are 43 chips on the PCB; each contributing 9 watts.
But after running the model, it showed some negative temperatures on the PCB?
What could I be doing wrong?
Brent
I've seen this happen when the mesh is not sufficient to capture the geometry. You can show the global min & max locations to possible indicate the area where the problem lies. You'd want to create a surface plot of the mesh and turn off the option to "Use CAD geometry," so this will reveal for you the true computational mesh.