I am using UCC28610DR, but I am having a hard time getting it. Please let me know if there is a similar product that can be replaced with P2P.
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Thank you for your interest in the UCC28610 flyback controller.
Unfortunately, this is a unique controller which incorporates the lower portion of a cascoded high-voltage switch. Currently, there is no other similar part (whether P2P or not) that will drive an external MOSFET this way.
I will alert our marketing group to see if a source of UCC28610 components can be located.