tom66
Junior Member level 1
I am trying to think if it is possible to adjust the MC34063A SMPS controller (or a similar controller) with an external voltage or MCU control. I could use a digital potentiometer but those are not cheap.
Is there some analog solution I can use to change the feedback pin voltage? It doesn't matter too much if it's not a linear response as the MCU can correct for that.
I was thinking of using JFETs because I've made 1:16 variable resistors with them before, but I wanted to know if anyone has any better idea.
Thanks,
Tom.
Is there some analog solution I can use to change the feedback pin voltage? It doesn't matter too much if it's not a linear response as the MCU can correct for that.
I was thinking of using JFETs because I've made 1:16 variable resistors with them before, but I wanted to know if anyone has any better idea.
Thanks,
Tom.