LM5160-Q1: regular the secondary side method without optical coupling?

Hi Team,

Here are two questions that need your help:

1. I would like to ask if there is any way to stabilize the secondary side of the LM5160 for Flybuck when optical coupling cannot be used?

2. Are all the buck can be applied in fly-buck topology? Or are there any specific conditions that must be met to apply a buck in fly-buck topology?

Thanks and best regards,

Jamie