Switching element control device
AssigneeMitsubishi Electric Corporation
InventorsMitsuru Kaneda, Tetsuo Takahashi, Shinya Soneda, Ryu Kamibaba
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Abstract
A switching element control device for controlling a switching element incorporating a reverse conducting diode is provided. The switching element control device includes: a voltage detection circuit detecting a voltage across first and second main electrodes of the switching element; a comparator circuit comparing the voltage detected by the voltage detection circuit with a threshold voltage; and a drive circuit controlling driving of the switching element. The comparator circuit controls the drive circuit so that an on signal is not provided to the switching element when the detected voltage exceeds the threshold voltage.
Claims5
A switching element control device for controlling a switching element incorporating a reverse conducting diode, the switching element control device comprising:
- a voltage detection circuit detecting a voltage across first and second main electrodes of the switching element;
- a comparator circuit comparing the voltage detected by the voltage detection circuit with a threshold voltage;
- and
- a drive circuit controlling driving of the switching element, wherein
- the comparator circuit controls the drive circuit so that an on signal is not provided to the switching element when the detected voltage exceeds the threshold voltage, and
- the voltage detection circuit inputs the detected voltage into the comparator circuit when a positive bias for the reverse conducting diode is applied across the first and second main electrodes, and does not input the detected voltage into the comparator circuit when a positive bias for the switching element is applied across the first and second main electrodes.
A switching element control device controlling a switching element incorporating a reverse conducting diode, the switching element control device comprising:
- a voltage detection circuit detecting a voltage across first and second main electrodes of the switching element;
- a comparator circuit comparing the voltage detected by the voltage detection circuit with a threshold voltage;
- and
- a drive circuit controlling driving of the switching element, wherein
- the comparator circuit controls the drive circuit so that an on signal is not provided to the switching element when the detected voltage exceeds the threshold voltage,
- the switching element comprising:
- a region of formation of the reverse conducting diode and a region of formation of the switching element alternately arranged in stripes in plan view, and
- a stripe width of the region of formation of the reverse conducting diode and a stripe width of the region of formation of the switching element are set so that snapback occurs when a positive bias for the reverse conducting diode is applied across the first and second main electrodes in a state of the on signal being provided to the switching element.
Dependencies are inferred from the claim text.