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TI同步整流方案怎么选用?

Other Parts Discussed in Thread: LM5035, UCC28950, UCC24610

同步整流三种形式,有什么本质区别吗?
1.通过付边多一个绕组驱动同步整流mos

案例是见图或slur289,也可用于大功率的,据说100-200w也可以的
2.通过付边绕组+同步整流ic,再驱动同步整流mos

案例是 UCC24610
3.原边PWM芯片给出同步整流信号,再隔离传递到付边,然后ic驱动同步整流mos

案例是LM5035

一个比一个复杂,成本也高。有什么本质区别吗?怎么选用?