Part Number:UCC28780
Hi,
I am design a 65W ACF PD design with UCC28780.
I face an issue that:
Test condition: Vin=115Vac/60Hz, Vout=5Vout;
If power on the board with 0.1A load, the output voltage could be built well. And then decrease the output load to 0A, the output voltage could be set at 5V.
But when power on the board with 0A, the board is alway in re-start state, and the board will be turned off after the output voltage reaches to 5V about 8ms.
I have checked the auxiliary voltage VDD for UCC28780, and it is good before the board was turned off.
Please help provide suggestion.
Br
Eleven Chen