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heat sink design for mosfet

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sunnycfc9

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For power dissipated by MOSFET, switching loss and conduction loss should be taken into account. May I know should I take snubber losses into account as well as my circuit has the snubber circuit? Thanks
 

chuckey said:
When the FET switches on it draws some current through the snubber Cap (limited by its series resistoor), so the FET dissipation does increase,though not by much.
Frank
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Thanks. In my case actually snubber loss is actually a bit high as I am switching at high frequency. It does affect the size of the heat sink.
 

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