Drive circuit for voltage driven type semiconductor device

Details Drive circuit for voltage driven type semiconductor device Drive circuit for voltage driven type semiconductor device

1991-07-12

1993-04-06

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 18, H03K 1756

Patent

active

052008797

ABSTRACT:
A drive circuit for a voltage driven type semiconductor device having a serial circuit of a resistor and a Zener diode. One terminal of the serial circuit is connected to an output terminal (collector) of the semiconductor device. An overcurrent flowing in the semiconductor device is detected based on a current flowing through the serial circuit and the presence or absence of a drive signal fed to the drive circuit from an external control circuit. The detection level of the overcurrent can be adjusted by the voltage of the Zener diode, and the quick detection becomes possible. This arrangement makes it possible to detect an overcurrent in the semiconductor device, and hence to detect a shortcircuit in a circuit connected to that device in a minimal time required, thereby reducing the energy consumed in the semiconductor device during the short circuit.

REFERENCES:
patent: 4721869 (1988-01-01), Okado
patent: 4949213 (1990-08-01), Sasagawa et al.

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