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LM2588: Large Input Current Draw and Compensation of Flyback

ILIA VARDSIHVILI
Prodigy 30 points
Part Number: LM2588

I am designing a  flyback transfomer with isolated feedback using an opto-coupler

Vin = 18VDC - 36VDC 

Vout = 12V/1A, -12/1A

The issue I'm having is that the LM2588-ADJ draws excessive current and eventually leads to part failure. As per some application notes, i have the opto-isolated feedback connected to the compensation pin of LM2588-ADJ with 4.7KOhms pull up to Vin. The feedback pin of LM2588 is connected to -Vin.