公开(公告)号：US20130271927A1

公开(公告)日：2013-10-17

申请号：US13443892

申请日：2012-04-11

Applicant: Chih Ting Lu

Inventor： Chih Ting Lu

IPC: H05K1/18

CPC classification number: G06F1/266

Abstract: A mainboard is provided with a plurality of USB connectors; a switching circuit; a current limiting circuit electrically connected to the switching circuit; a power loop for supplying electrical power to the switching circuit, the current limiting circuit, and the USB connectors; and a control chip. The control chip is programmed to enable the switching circuit so that current is blocked flowing from at least one of the USB connectors to the switching circuit via the current limiting circuit when the mainboard is powering on.

Abstract translation: 主板设有多个USB连接器; 开关电路; 电连接到所述开关电路的限流电路; 用于向开关电路供电的电源回路，限流电路和USB连接器; 和控制芯片。 控制芯片被编程为使能开关电路，使得当主板上电时，电流被阻挡从至少一个USB连接器流经开关电路。