Electrical – High Voltage Totem Pole Driver

What if you dispense with the buffer transistors and add some capacitance to your 12V rail?

The continuous current rating will remain the same, but a few uF should prop it up for the brief surges required to charge the gates.

There's also the output current rating of your logic to consider, mostly the peak rating.

I think without resistor (and zener) values and specific BJTs there's not much that can be said other than "looks ok", except you'll mostly likely want a decoupling cap in parallel with your push-pull stage.

You could also add a speed-up capacitor in parallel with RG10 if this is going to be switched at high frequency all the time.

Regarding the PNP/NPN push-pull transistors, you generally want a hfe of at least 200 with these, so they saturate easily; with BC847, I'd go with the "B" grade/variant which has 200/290/450 min/typ/max hfe.

It's hard to be sure about these things, but the issue @MadHatter mentioned (exceeding the Vbe spec on the top of the push-pull transistors) doesn't seem to show up in simulation, even with 30V source.

YMMV on these things.