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Registered Member #514
Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295
Tonic wrote ...
See the blue comparison table. You can see that internal diode must be disabled, otherwise transistor will blow up. Hope this is reason why you have so much breakdowns.
The internal diode is fine as long as you are in tune. Steve Conner build his DWSSTC with no schottky or fast diodes and it worked fine .
Those are only needed when running an open-loop system, but since everyone uses feedback drivers these days, it's ok not to use them.
If you want your mosfets to live, you'll have to switch to a feedback driver. Or seriously limit the power...
Registered Member #528
Joined: Fri Feb 16 2007, 10:32PM
Location: Warsaw, Poland
Posts: 166
Is it possible to adapt feedback to NE555 driver? Maybe a antenna with resistors and 74HC14 in series to NE55's output? But it would mess with NE555's signal..
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