公开(公告)号：US5723915A

公开(公告)日：1998-03-03

申请号：US985406

申请日：1992-12-04

申请人： Thomas R. Maher ,  Norman E. LeComte ,  Keith W. Kawate

发明人： Thomas R. Maher ,  Norman E. LeComte ,  Keith W. Kawate

IPC分类号： H02H3/093 ,  H03K17/08 ,  H03K17/082 ,  H03K17/16 ,  H04H3/08

CPC分类号： H03K17/166 ,  H02H3/093 ,  H03K17/0822 ,  H03K2017/0806 ,  Y10T307/406 ,  Y10T307/865

摘要： A solid state power controller for switching power on and off to an electrical load which also serves as a circuit protection device protecting the load and/or the wire connected between the load output terminal of the controller and ground from thermal damage due to current overload is shown. When a current overload exists the controller interrupts current to the load in a time inversely proportional to the square of the magnitude of the overload as shown in a trip time vs load current curve. The controller also limits the load current to a selected maximum level by controlling the drain-source resistance of power MOSFETs used for switching the power. A secondary interrupt is provided in the event that the junction temperature of the MOSFETs has risen a selected maximum level. A thermal memory feature is included for both interrupt signals. The controller is controlled by a single on/off input line and provides both a status and trip output line to indicate its state. The status can be configured to monitor load voltage or load current flow as desired. The controller also can be configured to default to either an on or off state in the event the input line is disconnected.

摘要翻译： 一种固态电源控制器，用于将电源开关切换到电负载，该电负载也用作保护负载和/或连接在控制器的负载输出端子与地之间的电线免受电流过载导致的热损伤的电路保护装置， 显示。 当存在电流过载时，控制器将在与负载电流曲线所示的过载幅度的平方成反比的时间内中断负载电流。 控制器还通过控制用于切换电源的功率MOSFET的漏极 - 源极电阻将负载电流限制到所选的最大电平。 在MOSFET的结温上升到所选择的最大电平的情况下，提供二次中断。 两个中断信号都包含一个热存储器功能。 控制器由单个开/关输入线控制，并提供状态和跳闸输出线以指示其状态。 该状态可以配置为根据需要监视负载电压或负载电流。 在输入线断开的情况下，控制器也可以配置为默认为开或关状态。