Part Number:UCC28600
Hi all!
I designing the power supply, that used UCC28600 controller, 12V 120W
But, I had had a problem with the auxiliary voltage. When no load, Vaux is 16.5V. And I start to increase LOAD with 0.1A to 0.5A, Vaux is 21V (I measured by the multimeter
I hope to find an error to resolve the problem!
Schematic
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Calculator for the design
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Waveform no load 17.7V VDD
Waveform 0.2A 20.5V VDD
Waveform 0.5A 21V VDD
