You speak in riddles.OK, then i must lower the rise time but it will give more thicker tracks.
A useless question .... as we don't know what power supply you are talking about.how the power supply pcb withstand 35 A and more?
Heat spreading is good, because it reduces temperature. The same heating power (energy) becomes spread over a larger area.will increase heat spreading i agree with you both and confused what to do,
Larger area of copper means good dissipation but at same time the large area the heat will speard and heat up the pcb.
Here is a piece of PCB that I designed long ago which carries 10A per contact:
View attachment 158066
Hi,
Those short pieces of traces may carry a lot more current than the calculation says.
It's a game of generated heat power, area to dissipate this heat, ambient temperature, ambient heat sources..
Klaus
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