Patent ID: 6504697
Filing Date: 2003-01-07
Classification: G01K,H01L,H02H,H03K

Abstract:
An arrangement for overload protection of a switch, to which a load circuit and a control circuit are connected, wherein:the control circuit includes at least one logic circuit, a gate drive connected between an output of the logic circuit and a control input of the switch, a comparator, which compares a voltage drop across the switch to a predetermined threshold value, and a temperature sensor a discrete component relative to at least the switch and having an associated threshold-value recognition; the logic circuit is responsive to the output of the comparator and the temperature sensor to cause the gate driver to switch off the switch when at least one limit value for the voltage drop across the switch, or a limit value for the permissible switch temperature, is exceeded; and the temperature sensor has its temperature-measurement point on an external electrical connection of the switch, with this electrical connection simultaneously serving for the thermal coupling of the temperature sensor and the switch.