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TPS65950如何连接4PIN的USB设备

Other Parts Discussed in Thread: TPS65950, DM3730

我们现在用DM3730通过ULPI连接TPS65950,TPS65950通过USB_A(4 PIN)连接USB设备,现在TPS65950与USB_A连接图如下:

请问这样的接法有没有问题?VBUS电流不够怎么办?