Other Parts Discussed in Thread: UCC28063, UCC28070
UCC28063 SUITABLE FOR 3KW PFC CORRECTION
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Yes, it is a tough design; but it is possible to do in PCB. You will need thicker Copper on PCB (may be 105u).
The spacing required will depend on many parameters like PCB material, pollution level, altitude etc. IEC/UL 60950-1 2nd Edition Tables 2K, 2L, 2M or 2N give the spacing requirements based on these. For equipments not covered by this standard, IPC-2221B gives the spacing required. It is 5mm for 1000V as per this, but this is only indicative - you should use the appropriate spacing as per the requirements of the system you are designing.
Typically you will need around 10mm wide trace for 30A current if you use 105u Copper. It will increase to about 16mm for 70u Copper.