Other Parts Discussed in Thread: UCC28063
We use UCC28064A to replace UCC28063 , and The UCC28064A is affixed directly to the UCC28063 board. We don’t want to our design in burst mode ,so we connect 9 pin in GND through a 0Ω resistance .
UCC28064A Test Waveform and Schemetic.docx
1、100V AC Switching to 220V AC ，the input current changes from a sine wave to a haphazard waveform. And turn off AC ,input 220V AC again then input current become sine wave again ？What are the possible problems.
2When we add 50% or light load , the PFC work abnormal .PF Value PF values start to bounce between 95% and 85% . The measurement of the waveform after rectification and the output of the VGS will be abnormal.
