I've seen many thread-starters on this forum who think they can accomplish the feedback to control a switching regulator with a MCU. I wonder how many of them succeed? It's all about the phase response, and calculating that becomes much less trivial once you have a sampling system.

Yeah another example of how basic intuition fails. Control systems are often not so simple that you can just throw stuff together or add stuff without considering the complete stability. Lucky sometimes it work, but if it doesnt then problems come up quickly.

 

Hello,

Perhaps the attached pdf´s might help.

Bertus