公开(公告)号：US20140362478A1

公开(公告)日：2014-12-11

申请号：US14285653

申请日：2014-05-23

Applicant: ASUSTeK COMPUTER INC.

Inventor： Chung-Wei KUO ,  Yu-Wei HSU ,  Shao-Kang CHU ,  Chun-Yen LIU

IPC: H02H7/12

CPC classification number: H02H11/005 ,  G05F1/573 ,  G05F1/66 ,  H02H3/08 ,  H02H9/02

Abstract: A short-circuit protection circuit adapted to a voltage regulator module is provided. The voltage regulator module includes a high side transistor and a low side transistor. The short-circuit protection circuit includes a short-circuit detecting circuit, a first switch, and a second switch. The short-circuit detecting circuit includes a detecting terminal coupled with the high side transistor. The high side transistor is connected with the low side transistor and a load, and the low side transistor is coupled with a ground. The first switch is connected with the low side transistor in parallel. The second switch coupled between the high side transistor and the power supply. The first switch is turned on before the power supply is powered on, the short-circuit detecting circuit sends a detecting voltage to the high side transistor via the detecting terminal to determine whether the high side transistor is short-circuited to control to second switch.

Abstract translation: 提供了适用于电压调节器模块的短路保护电路。 电压调节器模块包括高侧晶体管和低侧晶体管。 短路保护电路包括短路检测电路，第一开关和第二开关。 短路检测电路包括与高侧晶体管耦合的检测端子。 高侧晶体管与低侧晶体管和负载连接，低端晶体管与地耦合。 第一开关与低边晶体管并联连接。 第二开关耦合在高侧晶体管和电源之间。 第一开关在电源接通之前被接通，短路检测电路经由检测端子向高侧晶体管发送检测电压，以确定高侧晶体管是否短路以控制到第二开关。