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UCC256303: Inquiries on VCR

Part Number: UCC256303

Hi Team, 

I would like to know more detail about the VCR control of the UCC256303 such as why it needs Icomp? Is there any flux imbalance issues of the Transformer when Gate_L and Gate_H are active on/ off by function VCR (duty of high side and low side are difference in one PWM cycle)?

Also, is the UCC256303 capable of interleaving to 2 or 3-phase?

Thanks! 

BR,

Alfred