non isolated power supply with tiny switch 4

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Hello,
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.
Thanks.

Hi Motiontech,

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

Regards,

PI-Lupin the Third