type 3 compensator with optocoupler
hi
i now have the book by Basso, its excellent, but its going to take a few reads to get into it here, and i've read the chapter twice so far.
does any reader know of any other article on type 3 compensation with TL431 and opto?
I am unclear as to how the use of a fixed voltage providing the LED current affects it. Also, on the interplay between R(LED) and R(pull-up). Also, on what happens if R(led) and R(upper) connect to the same node, as well as how to find the opto-coupler pole, and whether or not the bode plot looks just the same as a normal type 3..(i.e. one without the TL431)
Type 3 compensation is easy with non-isolation, but when TL431/OPTO isolation is used, a whole can of wrigglers opens up.