Fet for turning on high voltage.

[hjhasler]

Hi Ioannis

If you carefully analyse my circuit you’ll notice that I have chosen a cheap way to generate 12V. (Z-Diode D2) So the TLP351 is supplied with 12V (24V – 12V). Therefore the FET Source-Gate has 12V maximum.
But I have made indeed a little mistake. I switched Source and Drain. Here the updated circuit:


Cheers
Hans-Jörg

[Ioannis]

Ooops, yes, you are right. Did not give much thought on the Zener diode. I suppose that the overall performance of the circuit, in respect of rise and fall times is better that the one with the resistor divider.

Nice job.

Ioannis