UCC28063A: We want to check whether the device can support 85VAC input, 600Vdc output. And what's the max frequency of the devices?

Frank

UCC28063A can support a 85VAC input and 600VDC output.

The minimum switching period is specified in the electrical characteristics of the datasheet with 2.2us typical. The inverse of the minimum switching period is the maximum switching frequency, which is 455kHz typical.

Best Regards,
Eric