Mosfet heating Up in DC DC converter

[praveen]

Hello Chris,
Thanks for the reply.

I donot have any heat sink, but 80K over ambient temperature looks ok.
AS the junction temperature is around 150 C.

If i am wrong please correct me.

Thanks and regards
Praveen

 

[Ban]

praveen wrote:

Hello Chris,
Thanks for the reply.

I donot have any heat sink, but 80K over ambient temperature looks ok.
AS the junction temperature is around 150 C.

If i am wrong please correct me.

Thanks and regards
Praveen

What you can do to improve the thermal resistance is to glue a heat-sink
onto the package. There are special glues for that so they do not get loose
with the high temperatures. This is of course only a bad substitute for a
better layout with large free copper areas as recommended in the
manufacturers data sheets.
--
ciao Ban
Bordighera, Italy