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UCC28070: About QVFF levels(circuit)

Guru 19460 points
Part Number: UCC28070

Hi Team,


We have two questions for QVFF levels(circuit).



We understand that QVFF levels is changed by VINAC peak.

When QVFF levels is changed (From level2 to level1), does any problem occur (for example, switching stops etc.)?



If we change "VIN" slowly (“From 85VAC to 265VAC” or “From 265VAC to 85VAC”),

Does the change of QVFF levels adversely affect UCC28070 operation (for example, switching stops etc.)?