Power Supply Design

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I want to design a SMPS with 150VAC-290VAC input and output parameters O/P: 35V, 1.05A(Constant Current)using fly-back topology. Please suggest me the IC and design I should follow to meet the requirements considering efficiency on priority.

You can use LinkSwitch-PH Ics. Pls see attached reference design thats close to your spec.
http://www.powerint.com/sites/default/files/PDFFiles/der286.pdf