Hi i am building a small dc/dc converter usinf st1s10 step down module (standard synchrounous step down converter) all of those conveter use a feedback pin with two resistor for setting out the voltage . feedback voltage is always about 800mv. My question is i would like controlling the output voltage of the converter using a PIC (converting pwm to voltage reference). how can i connect my voltage reference to the converter.
i was doing before with a potentiometer before but i cant send a voltage directly at Feedback pin. i would need a virtual potentiometer!.
could i use a transistor to simulate a varaible resistor? Could i replace Rin with a transistor or ic that simulate a resistor to change the gain of amplificator.
Thanx
i was doing before with a potentiometer before but i cant send a voltage directly at Feedback pin. i would need a virtual potentiometer!.
could i use a transistor to simulate a varaible resistor? Could i replace Rin with a transistor or ic that simulate a resistor to change the gain of amplificator.
Thanx