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SEMICONDUCTOR DEVICE DRIVING UNIT AND METHOD

  • US 20120032709A1
  • Filed: 08/05/2011
  • Published: 02/09/2012
  • Est. Priority Date: 08/09/2010
  • Status: Active Grant
First Claim
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1. A semiconductor device driving unit which supplies, to establish electrical continuity or disconnection in a bus, a drive signal to a gate of a first semiconductor device of a series connection of the first semiconductor device and a second semiconductor device each of which has such a switching function as to be turned on or off according to a voltage of a drive signal applied to the gate, a collector and an emitter of each of which are inserted in the bus, and each of which is connected to a free wheeling diode in parallel, the semiconductor device driving unit comprising:

  • a feedback unit configured to generate a feedback voltage as part of the voltage of the drive signal according to a temporal variation of a current flowing through the bus,wherein the feedback unit comprises;

    a turn-off feedback unit configured to generate the feedback voltage according to a temporal variation of a collector current of the first semiconductor device in a case that the first semiconductor device is turned off from on; and

    a turn-on feedback unit configured to generate the feedback voltage according to a commutation current flowing through the free wheeling diode connected to the second semiconductor device in a case that the first semiconductor device is turned on from off.

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