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Hi
540W, 可选用TI的半桥LLC谐振芯片UCC25600, TI有一些方案: http://www.ti.com.cn/product/cn/UCC25600/toolssoftware
但是没有完全符合你参数的,你可以借助一些工具来设计,例如上述网站下方案的计算工具之类。