Other Parts Discussed in Thread: UCC256304, UCC28056EVM-296, UCC28056, PMP20612, LM8364
My customer is using UCC256301EVM-291. IC is changed to UCC256304.
And he connected to UCC28056EVM-296.
Two problems happened when AC input voltage slowly down.
1. The AC voltage when the output stops depends on the load value.
Output stops at AC78V (load 10A), AC43V (load 5A), AC23V(load 1A)
2. Output Hunching at 10A load. Waveform No.4
Not Hunching at 1A load (Waveform No.3) and 5A load (Waveform No.5)
The waveform is attached powerpoint 7 pages.
I need the reason why? and countermeasure with no parts addition.
Because the customer selected these ICs at the point of view less parts count.
He need quick answer.UCC25630-1EVM-291wUCC28056EVM-296.pptx