UCC28780: Pls suugest UCC28780 for input 3 phase(340-550Vac ) output 24V/10A Flyback solution

Hello Prarinya,

Thank you for your interest in the UCC28780 Active-Clamp Flyback controller.

This controller is not really suited for your application, due to the high power level and high input voltage range.
For this power level, a PFC stage is usually necessary and an LLC topology is more suitable for the DC/DC conversion.

I suggest to look at UCC2805X, UCC2806X, and UCC28180 families of PFC controllers.
For the LLC stage, please check out the UCC25630-X family of controllers.
Unfortunately, I could not find a reference design for ~240W with such high input voltage.
Nevertheless, each stage can be designed using appropriately-rated components by following the available design tools for each controller.

Regards,
Ulrich