Mosfet heating Up in DC DC converter

From: praveen (praveenkumar1979_at_rediffmail.com)
Date: 12/24/04 

Date: 23 Dec 2004 17:38:58 -0800

Hello Mr. Meindert,

Thanks for the reply.

About maximum temperature rise:
Thermal resistance =150 K/w (50+100)
So temperature rise= 114 K so it means 50 C increase in temperature.
So junction temperature is around 80 c which very much below the
juction temperature (150 c). About the drive voltage higher FET has
around 35-40 V and lower 8-10 V.

Please correct me if i am wrong.
Is there some thing which i am missing???
Is have not provided any heat sink. My boss is not agreeing with any
PCB changes. If it is very much require i have to convince him.
It need your feedback from you people.

Thanks and regards
Praveen

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