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Methods and systems for operating power converters

  • US 8,310,796 B2
  • Filed: 07/13/2011
  • Issued: 11/13/2012
  • Est. Priority Date: 07/13/2011
  • Status: Active Grant
First Claim
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1. A switching circuit for use in a power converter, said switching circuit comprising:

  • an insulated gate bipolar transistor (IGBT) comprising a gate terminal, a collector terminal, and an emitter terminal;

    a gate drive circuit electrically coupled to said gate terminal and configured to switch said IGBT on and off; and

    ,a temperature drift resistant clamp circuit electrically coupled between said gate terminal and said collector terminal of said IGBT, said temperature drift resistant clamp circuit configured to maintain a voltage at said collector terminal below a threshold voltage and facilitate reducing the effects of temperature on operation of said switching circuit, wherein said temperature drift resistant clamp circuit comprises;

    at least one zener diode; and

    ,a temperature compensation circuit electrically coupled to said zener diode and comprising at least one thermistor that compensates for a change in a breakdown voltage of said zener diode due to a change in temperature.

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