I have a power supply that regulates its output by turning a potentiometer. It supplies the full 90V to the two leads of a 200k potentiometer. By sending a voltage in-between 12-90V to the wiper input on the power-supply, it will adjust its output. I tried to use a mcp41010 digital potentiometer, however it promptly let the smoke out since you can only apply 0 to VDD across its leads. Is there a way to add additional circuitry to use a digital potentiometer, or is there a better solution to divide 90V using a microcontroller?
Edit: The powersupply I'm trying to dynamically adjust it this one: