Infineon Technologies Austria Ag

Johannes Groeger

Karl Norling

Bernhard Wicht

Anton Mauder

Alexander Schreiber

A method for protecting a power switch during turn-on includes sensing that a change in current through the power switch is in regulation, measuring a time the change in current through the power switch is in regulation, and comparing the time the change in current through the power switch is in regulation to a reference time. An over current signal, which can be used to disable the power switch, is generated if the time the change in current through the power switch is in excess of the reference time.

Method of over current and over voltage protection of a power switch in combination with regulated DI/DT and DV/DT

A method for protecting a power switch during turn-on includes sensing that a change in current through the power switch is in regulation, measuring a time that the change in current through the power switch is in regulation, and comparing the time that the change in current through the power switch is in regulation to a reference time. An over current signal, which can be used to disable the power switch, is generated if the time that the change in current through the power switch is in excess of the reference time.

In accordance with an embodiment, a method of driving a switching transistor includes driving the switching transistor with a gate drive signal; measuring at least one of a derivative of a load path voltage and a derivative of a load path current of the switching transistor; measuring a derivative of the gate drive signal; forming an error signal based on a reference signal, a measured derivative of the gate drive signal, and at least one of the measured derivative of the load path voltage of the switching transistor or the measured derivative of the load path current of the switching transistor; and forming the gate drive signal, where forming the gate drive signal includes processing the error signal using a dynamic controller.

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Blaubeuren, Germany

Johannes Groeger