公开(公告)号：US20140111895A1

公开(公告)日：2014-04-24

申请号：US14145067

申请日：2013-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuewen PENG ,  Wenzong Cao

IPC: H02H9/02

CPC classification number: H02H9/025 ,  H02H1/04 ,  H02H9/005 ,  H02H9/041 ,  H02H9/047 ,  H02H11/002

Abstract: A surge protection circuit, related to the power electronics field. The surge protection circuit includes: an input configured to provide direct current power supply, an output configured to connect to a next circuit, and a cutoff circuit connected to the output; the surge protection circuit further includes: a discharge circuit connected between the input and the cutoff circuit; the discharge circuit includes: a diode and a field-effect transistor; the cathode of the diode is connected to the positive end of the input, and the anode of the diode is connected to the source of the field-effect transistor; the gate of the field-effect transistor is connected to the positive end of the input, the drain of the field-effect transistor is connected to the negative end of the input, and the direction of the parasitic diode of the field-effect transistor is opposite to the direction of the diode.

Abstract translation: 电涌保护电路，涉及电力电子领域。 浪涌保护电路包括：被配置为提供直流电源的输入，被配置为连接到下一个电路的输出和连接到输出的断开电路; 所述浪涌保护电路还包括：放电电路，连接在所述输入和所述截止电路之间; 放电电路包括：二极管和场效应晶体管; 二极管的阴极连接到输入的正极，二极管的阳极连接到场效应晶体管的源极; 场效应晶体管的栅极连接到输入的正极，场效应晶体管的漏极连接到输入的负端，场效应晶体管的寄生二极管的方向为 与二极管方向相反。