Hello! I'm trying to design a control method to enable & disable my power supply.

According to the datasheet, these are the signals that the PS-ON requires:

and this is the block diagram:


I want to use a GPIO pin from my ESP32 to drive a mosfet and provide a 5V or GND signal to the PS-ON pin:


And for whatever reason... it doesnt work. frustrating! What am I overlooking? any input is appreciated!

 

What does your meter read when measuring the switching voltages from GND to PS_ENABLE and PS-ON?

 

Your circuit looks good, assuming this is the pinout you used:

Power on: PS-ON = "Hi" or " > 2 ~ 5V"
Power off: PS-ON = "Low" or " < 0 ~ 0.5V"

not sure what the input impedance is but i would think that 1k is low enough.
you can try to just put jumper 1-3 on CN951.

 

The words in post #3 did not at all answer the question of post #2. AND that is a very important question that I would also pose.
Consider that if the correct command is not supplied the correct action should not be expected. And it is likely that the circuit in post #1 does not provide the required commend.