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Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Hi!
Some time ago I found this kind of circuit http://uzzors2k.googlepages.com/ET_Flyback_basic.gif/ET_Flyback_basic-full.jpg for driving a flyback. But what if I replace the 1nF cap with a 100pF one, the frequency rises ten times bigger, could it then be used as a simple sstc driver? And will IRFP240 work well in this circuit?
Registered Member #639
Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
I would recommend to build a self tuning coil, I tried the 555 approach when I first started to mess around with sstc's. I found out that the easiest way to build a sstc is by using a self tuning circuit like this one, it's really easy to build.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
I think the NE555 CAN drive smaller (<2nf) fets at SSTC frequencies. However you would need to run the coil in Class E (resonant capacitor from drain to ground) otherwise you would smoke your fet soon. This requies a bit of tuning and you definately need a scope to get it working properly.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Thanks for replies. I think I will be aiming towards the Steve's Micro SSTC circuit. However, my local electronics supplier doesn't have tc4420 drivers. So which driver should I try?
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NE555+IRFP240=SSTC Driver (Would this work?)
