This circuit is going to be in a production environment. I want to turn a relay on and off using a P-channel MOSFET. This action of turning on and off is not a periodic signal at a high frequency, hence a MOSFET driver is not needed.
When the controller is set high (activated), it pulls the output to ground.
R3 is added to limit the current into the gate. R2 is added to pull up the gate to 12V, so it is not floating. Diode added is a flyback diode.
The internal circuitry contains a 3V voltage that is pulled through R1.
Is this circuit sufficient for a production design? What standards do you guys follow when designing a similar circuit?
Also by the looks of it the IRF9530 FET will not work because the Vgs is to high, are my calculation coorect?
A redundant pull-up is added so even if the control internal circuit is not plugged in, the load is still OFF.