/diy/ - Do It Yourself

>>1764291
And now with the double darlington we've got this when at 200kHz, which should be good enough. Note that I'm currently short on 1N4148s, so this is without the diodes. Adding the diodes might improve the characteristics further, but we'll wait and see. If I was actually switching a MOSFET at 200kHz I wouldn't want to do it with this waveform, especially not switching potentially 60W of load, so I'll actually be switching it closer to 20kHz, maybe as high as 50kHz.

Oh and there's also the whole "it isn't very close to the 12V rail" issue to take care of. Putting a big filter cap from +12V to GND raises it from 6V to 7V, using 5k pullup instead of a 10k pullup increases that to 9V. All I need is for it to be above the PFET's threshold voltage, and -3V isn't quite at the -2V minimum (or is it maximum). So I'll see about it when my diodes eventually arrive.