Semiconductor apparatus

Details Semiconductor apparatus Semiconductor apparatus

1996-05-15

1998-01-20

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

361 18, G05F 156, H02H 700

Patent

active

057105081

ABSTRACT:
A semiconductor apparatus includes a driver, an IGBT with a current sensing semiconductor element for controlling ON and OFF of a load current by a driving voltage from the driver, a current detecting section connected to a current sensing terminal of IGBT, for converting a detected current to a total voltage drop and a divided voltage, an overcurrent limiting circuit for reducing the control voltage to a certain value when the total voltage drop exceeds an operating threshold, a protecting circuit connected to the sense terminal, a protecting circuit including an OFF-signal generator circuit for outputting an OFF-signal which commands to stop outputting the control voltage when the total voltage drop exceeds a predetermined operation start voltage, and a delay circuit for delaying the OFF-signal for a certain time period.

REFERENCES:
patent: 4937697 (1990-06-01), Edwards et al.
patent: 5210479 (1993-05-01), Kimura et al.
patent: 5444595 (1995-08-01), Ishikawa
patent: 5548133 (1996-08-01), Kinzer
patent: 5550702 (1996-08-01), Schmidt et al.

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