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TPS2377

Other Parts Discussed in Thread: TPS2377, TPS2377-1

TPS2377和TPS2377-1能代换吗?没看出有什么差别,我用了下面的图,但是总是不能持续供电48V持续不到400ms就停掉了,是没有检测到吗?还有datasheet上说PG是active high,但是测试,仅在48V被供上的一瞬间PG是32V左右的电压之后迅速降到0,及时在后面的300多毫秒48V是正常的器件可不可以将VSS和下图中R1的右端强制短接实现对强制供电POE的兼容?