non isolated power supply with tiny switch 4

2 posts / 0 new

I want to modify DER881 for a non isolated flyback using TL431.
Just looking for a circuit idea to implement feedback. There is a zener based design in RDR839, but want to use TL431.

Hi Motiontech,

DER-881 can be non-isolated design using TL431 by shorting primary to secondary ground.


PI-Lupin the Third