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UCC28704: Cost-reducing this flyback power-supply design

Allen Fernandez
Intellectual 920 points
Part Number: UCC28704

I am trying to cost-reduce this UCC28704DBVR-1 based flyback design.  Can D6 be removed if a 150V MOV is already connected across AC-Mains (Line-to-Neutral) ?  What else can be removed and/or cost-reduced in the enclosed design ?