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UCC28722 WBENCH reference design disparity

Expert 1350 points
Other Parts Discussed in Thread: UCC28722, UCC28720, UCC28700, UCC28700EVM-068, PMP8519

I'm trying to design a flyback AC-DC supply with an output of 3.3V upto 1A. I noticed some weird behavior. If I try to get a WEBENCH design from the UCC28722 product page on the TI website it says that minimum Vout is 5V. However, if I run WEBENCH from its own page I can design a 3.3V supply. Is the UCC28722 suitable for a 3.3V supply? If yes, would the attached reference design work? I'm simply asking since I'll need to get a custom transformer made for this (even for prototyping purposes) and if this controller is not suitable it would be wasted expense for me.