small SSTCs

ragnar, Thu Apr 12 2007, 02:36PM

Hi all,
with my recent success with coils up to 13.56MHz and now 9MHz coils, switching "proper power" in the 100+ watt range, I wanted to try my hand at tiny coils!

I'd like to encourage some participation from the gurus here, the target being a scale akin to some of those exhibited in the infamous "World's smallest SSTC" thread (but without the irritating arguments).

Just to seed the thread with a few ideas:

* Small coils work best with a nice groundplane directly underneath them, like a sheet of copper clad,
* switching devices can be mounted on the same copper clad, to dissipate heat,
* with double-sided clad, you can tie opposing sides to Vcc and Gnd for really neat layouts,
* really low gate-capacitance devices like IRF510s can be driven with a small winding around the secondary,
* don't forget about nifty single-switching-device topologies like class-E,
* gatedrivers like IXDD414s make very handy halfbridges.

I'll be back when I've wound a secondary.