USB circuit device for preventing reverse current

专利名称：USB circuit device for preventing reverse

current from external device

发明人：Cheol-ho Lee申请号：US11580932申请日：20061016

公开号：US2007008A1公开日：20070419

专利附图：

摘要：A USB circuit device prevents reverse current while complying with USBspecifications. A USB circuit device includes a connector unit to which a USB device isconnected; a power supplying unit supplying power with the USB device through the

connector unit; a switching unit flowing current induced into the connector unit from theUSB device, into a ground selectively; and a controller controlling the switching unit toflow the current induced into the connector unit, into the ground if a level of the powerprovided with the USB device by the power supplying unit is less than a predeterminedvalue. Accordingly, there is provided a USB circuit device for preventing reverse currentfrom an external device and capable of protecting the circuit from over current withsatisfaction to a USB specification.

申请人：Cheol-ho Lee

地址：Suwon-si KR

国籍：KR

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