Part Number:UCC28780
I am doing a lot of recheck of our design schematic/pcb etc... of a product with UCC28780/sync rectifier with all GaN per design guide SLUSD12A
Pl see attached pdf : seems a wire went missing on VCC1 pin of U4 thus U7 also does not get biased.
True?
Also: thanks for updating the xl calculation spreadsheet. There seems to be still some issues...but that is for another post....Maybe happens only for DC-DC case with 380V DC(from PFC) with almost no ripple. If you do consider line ripple, it will be approx 1200 Hz but in theory, it ought to be "0"...There will be some "switching freq ripple"...also small at 100s of KHZ.
-r
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