Hi Maynard,
I found that you set the brown in voltage at 12V , but UCC28780 needs around 20V input to start switching.
I think that UCC28780 is not suitable for your application.
if the input spec is 25~40Vdc(even at brown in voltage) , you can refer the…
Hello Antonio,
Thank you for your interest in the UCC28730 flyback controller.
Although the PMP9009 reference design does not meet all of the customer specs, it is still useful as a reference of how the design will look. Its parameters can be adjusted…
