Welcome!
This is my first post on this forum!
My name is Dominik and I am from Poland!
I can't find similar topic on this forum and in a web so please help me with my problem.
Almost all topics in web not satisfy me and I am still looking for solution my problem.
I am looking for the best way to control synchronous dc-dc converter output voltage via uController.
My problem is how to control output voltage from converter.
I would like to control 4 dc converters from one Arduino.
My input voltage is 12,4V and output voltage should be from 5V to 90-100% of Vin.
My output current is up to 3A.
I have found this application note:
http://www.maximintegrated.com/app-notes/index.mvp/id/818but I am not sure if it is the best way.
Firstly I was thinking about last option with filtered PWM, but I wouldn't like to make feedback to uC.
My second idea was to replace the potentiometer by digital potentiometer, but it's little complicated and I think little overkill.
I would like to only set voltage via PWM or voltage or other signal and "send" this information (voltage which I wanna have on output) to converter without feedback to uController. DC converter should work alone without "help" and modify them PWM signal to maintain the output voltage which I wan't.
Is this possible?
I hope You know what I mean
Yesterday I found this two completely different schematics and way to modify feedback loop in dc converters.
Please check the attachments. I think this is it what I am looking for. What do You think about my problem?
If this topic should be inserted into other, please merge this to appropriate topic.
Best regards,
Dominik