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SSTC MOSFET over heating? Answered

The following images shows my SSTC work, it is based on steve wards mini SSTC. But the problem is that the MOSFETs seem to heat up in like 3-4 sec of running. Input voltage is 220v AC(rectified and filtered later using a SMPS line filter).

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seandogue
seandogue

Answer 6 years ago

and turned off just as fast. Losses occur at both the leading AND trailing edges...

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iceng
iceng

6 years ago

I think I see your heatsinks in the second to last pic,

Are you using heatsink thermal transfer grease

to pass the FET heat to the Al ??

Otherwise the heatsink does not work

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steveastrouk
steveastrouk

Answer 6 years ago

Oh yeah ,I see them now.