we made a 36v, 0.7A non dimmable led driver using LNK409.We followed der286 as reference and we got current 500ma to 630ma for an input variation 90v - 245v. Please find the attached ckt diagram and spread sheet design.
Observation is as shown below for input variation 90 - 245v.
IFB - 140uA - 150uA
IV - 33uA - 84uA
VB - 20.3V - 21.6V
Out put current is less than expected and there is no regulation. Please let us know what is wrong with our circuit.