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TPS92210: Doesn't work in Full Range

Part Number: TPS92210

Hi, i was trying to do a power supply (12V@0,5A) with a Buck Configuration.

But here is the issue:  Doesn't work when my input is equal to 220V. At 127V works ok.

There is a trouble with DZ3, the voltage never reachs to 5v1, then Vref can't go to 2.5V.

the schematics is attachedBuck Converter.pdf.