UCC25600: UCC25600 design open loop circuit

Dear Sir,

My cusomer would use UCC25600 to do a LLC output open loop structure(see below circuit).

The electrical spec as below

Vin=0V~800V,  Vo=Vin, Po=500W, Fosc=160K, DT=460nS

Question:

1. Does UCC25600 LLC suitable wide range input / output voltage application

2. Some input volage(like_300Vin) appear unstable condition, have any suggestion to improve this issue.

Thanks!

Steven