Ask 1kW ac to dc solution

On power rating, PMP20769, 24V/42A, or, 1008W, should be close to what you are asking, 1kW, but its input 380Vdc to 440Vdc, so higher than your input. It is a full bridge LLC.

I suggest to talk to your TI local sales as it looks you need a new reference design for the specs you provided.

Hi Sir,

Is PMP20769 document available to be shared? thanks you!

Attached is its schematics.

PMP20769RevA_Sch_06132017.pdf

Is possible to use this structure to achieve my customer need and how? thanks you!

Yes, the same structure can be used. But if you cannot modify this to your customer need, I would suggest you contact your local TI office and ask to make a new reference design for your customer. There will be a lot of detail changes so it is actually a new design although the structure is similar.