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UCC28750: UCC287502 will not start

Part Number: UCC28750

Tool/software:

UCC287502 will not start up.

I created the design on Webench and followed it exactly.

DC Input is 650VDC, output is 6VDC at 3 Amps

The startup voltage on VDD from the bleed resistors only reaches 0.8VDC

Even with 12VDC applied to VDD it still will not run