I am currently in a design which involved LT1683.
I have checked the design of demo board DC477A which uses LT1683.
I have implemented it but using my design parameters (48V - 24V@100W) but the behavior is not OK, even after simulation on LTSpice.
I don't understand the feedback loop (TL431, optoc., and VC Pin) in order to get a right compensation.
Could anybody give me some hints about how it works?
Why the FB pin is not used? How the Optocoupler works in this desing? Why you can compensate the loop in pin VC?
Thank you for your support.
Link to DC477A added.
[edited by: FCalvez at 8:55 PM (GMT -5) on 18 Dec 2020]