Im trying to design 36W constant voltage SMPS circuit that has an 24V DC mean output voltage and it will be adjusted 22V to 28V by potentiometer. I have a limited experiment about it. And Im using circuit design tool to design smps. I created 3 different design for 22V, 24V and 28V output. Feedback circuits of them are below.
As scheme seen that feedback resistor(Rfbt) change between 32 kohm to 42 kohm. At this point ;
- I removed regulation circuit that is at feedback block(I don't know why I need it or not)
- I added 32K resistor and 10k variable resitor
Is this a proper way to adjust output voltage? Or is there any good way to do it?
There isn't enough article about variabled smps or I couldnt found. I need an advice from experts for this feedback circuit