hello.
I have a question about UCC 256304.
For EVM, the input voltage is 390 V (typ).
We are remodeling UCC 256301 EVM because we want to use at 110V.
Input: AC 85 - 115 V (100 VDC)
Output: Two outputs of 60 V and 12 V are considered.
Changed the EVM transformer to a spec.
We are thinking about adding output board with 60V output board.
Feedback is done from 12V output.
At this time,
I changed the transformer, the resonance coil resonance capacitor,
the resistance for VCC,
the device UCC 225630-4 etc.
with the parts of EVM and confirmed the operation.
As a result, it became the waveform as attached.
I have not acted as expected.
The assumption of 60 V is outputted at 30 V, the assumption of 12 V is outputted at 6 V in the output.
The waveform has the attached waveform.
Where is the cause of such a waveform?
Thank you.
