Part Number: UCC28019A
My client tested the UCC28019A to be noisy at no load.
Test conditions are as follows:
VAC 220VAC/ no load.
After measuring the prototype I found to have audio noise, the VCOMP voltage is 1.4V lower than the normal (no audio noise) prototype.( normal VCOMP :1.5~1.9V),
I have added 1.5M ohm between VCC and ICOMP, which can solve the test problem. I have tried to adjust the ICOMP and VCOMP parameters and can't solve it. Is there any way to eliminate the noise of the UCC28019A by adding 1.5Mohm?