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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).

 

[Q1]

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.)?

 

[Q2]

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.)?

 

Regards,

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