How to select theremal resistance Rth ?

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1

Hi,

I’m doing project with Plecs software and I need to select Rth thermal resitance for my heat sink(DC/DC converter). The transistor I selected is IPB017N08N5. Can anyone give me advices how to select thermal resistance which will allow me to carry the simulation.

Regards,

Wojciech

2

Hi these app notes are a good starting point

http://www.ti.com/lit/an/spra953c/spra953c.pdf

http://www.ti.com/lit/an/snva419c/snva419c.pdf