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

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,
• a detection voltage amplifier,
• voltage dividing resistors, and
• an overcurrent detection circuit;
• wherein said switching element, said drive circuit, said switching elements and said overcurrent detection resistor are incorporated in a single hybrid integrated circuit, and
• wherein a detection voltage from said overcurrent detection resistor is amplified by said amplifier, is divided by said voltage dividing resistors, and is compared with a reference voltage in said overcurrent detection circuit, 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.

A hybrid integrated circuit device with an overcurrent protection circuit, 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 the switching elements,
• a detection voltage amplifier,
• voltage dividing resistors,
• an overcurrent detection circuit which compares a divided detection voltage with a reference voltage for carrying out an overcurrent protection,
• a hybrid integrated circuit comprising a plurality of connection pads, and
• a current detection terminal;
• wherein, in the vicinity of said current detection terminal, a first pad connected to receive a detection voltage from said overcurrent detection resistance, a second pad is connected to receive a detection voltage from said amplifier, and a third pad is connected to said voltage dividing resistors.