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PSE TPS23861中关于type 1 type 2的描述问题

Other Parts Discussed in Thread: TPS23861

各位好:

       在TPS23861手册中多次提到了802.3 type1(802.3 af)\ 802.3 type2(802.3at),这两个除了传输的最大功率不同之外还有其他不同吗?采用ALT A的方式,2 pair是否能够达到25W以上?

       如果PSE端2 pair能够满足25W功耗需求,是不是意味着PD端用2 pair的ALT A方式也可以达到25W的接收功率?

       另Type-2 (two-finger)是什么意思?如下截图