公开(公告)号：US20140036400A1

公开(公告)日：2014-02-06

申请号：US14051180

申请日：2013-10-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ming ZHOU ,  Jing LI ,  Shuai XU

IPC: H02H9/04

CPC classification number: H02H9/045 ,  H02H9/04 ,  H02H9/041 ,  H04L12/10 ,  H04L25/0266 ,  H04M3/18

Abstract: The present invention discloses a protection circuit of Power Over Ethernet (POE) port and an Ethernet power-sourcing equipment. The port protection circuit includes: a first common mode suppression component, a second common mode suppression component, and a rectifier bridge. A first input end and a second input end of the rectifier bridge are connected to a first direct current output end and a second direct current output end of a PoE control chip, respectively. A first output end or a second output end of the rectifier bridge is connected to an uncharged signal line of a PoE port. An end of the first common mode suppression component is connected to the first output end of the rectifier bridge, and another end thereof is grounded. An end of the second common mode suppression component is connected to the second output end of the rectifier bridge, and another end thereof is grounded.

Abstract translation: 本发明公开了以太网供电（POE）端口和以太网电源设备的保护电路。 端口保护电路包括：第一共模抑制分量，第二共模抑制分量和整流桥。 整流桥的第一输入端和第二输入端分别连接到PoE控制芯片的第一直流输出端和第二直流输出端。 整流桥的第一输出端或第二输出端连接到PoE端口的未充电信号线。 第一共模抑制分量的一端连接到整流桥的第一输出端，​​另一端接地。 第二共模抑制分量的一端连接到整流桥的第二输出端，另一端接地。