Robert Boschgmbh

Daniel Schweiker

Calin Purcarea

Tobias Richter

Tim Bruckhaus

Matthias Boesing

Falko Friese

Deepa Mathai

The invention relates to a circuit arrangement () for controlling a plurality of semiconductor switches connected in parallel, having an activation connection () and a deactivation connection (), and having a plurality of control connections (), each provided for connection to a control connection () of one of the plurality of semiconductor switches, wherein the activation connection () and the deactivation connection () are each connected to each of the plurality of control connections (), and wherein a circuit breaker () is provided between the activation connection () and at least one of the control connections (), furthermore having at least one detection and control arrangement which is designed to detect a current flow in the at least one of the control connections () and, if a short-circuit is detected on the basis of the current flow, to control the circuit breaker () to open.

Circuit arrangement for controlling a plurality of semiconductor switches connected in parallel

The present invention relates to a method for short-circuit detection by saturation detection in power semiconductor switches and to a corresponding device. A reference voltage (U) is provided as a function of a supply voltage (UVDD) of a power semiconductor switch. A differential voltage (U) is generated from the difference of a voltage drop (U) of a load path of the power semiconductor switch and the provided reference voltage (U). The generated differential voltage (U) is compared with a predetermined threshold voltage (U). A short-circuit current in the load path of the power semiconductor switch is detected when the differential voltage (U) exceeds the threshold voltage (U). In this case, the power semiconductor switch is opened.

Method and device for short-circuit detection by saturation detection in power semiconductor switches

Growing community of inventors

Ludwigsburg, Germany

Daniel Schweiker