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Inverted circuit overcurrent protection device and hybrid integrated circuit device with the same incorporated

  • US 20030227730A1
  • Filed: 04/24/2003
  • Published: 12/11/2003
  • Est. Priority Date: 04/24/2002
  • Status: Active Grant
First Claim
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1. An inverter circuit overcurrent protection device comprising:

  • a plurality of switching elements, a drive circuit for driving the switching elements;

    , a control circuit which generates a control signal to be inputted into the drive circuit to control a load, an overcurrent detection resistor connected to said switching element, an overcurrent detection circuit, an external resistor; and

    one or more voltage dividing resistors;

    wherein said drive circuit, said switching element and said overcurrent detection resistor are incorporated in a single hybrid integrated circuit; and

    wherein a detection voltage from said overcurrent detection resistor is divided by said voltage dividing resistors and is compared with a reference voltage in said overcurrent detection circuit, for carrying out an overcurrent protection, and said external resistor is connected with one of said voltage dividing resistors to change the division ratio so that the level of said overcurrent protection can be adjusted.

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