Semiconductor integrated circuit device having overcurrent...

Details Semiconductor integrated circuit device having overcurrent... Semiconductor integrated circuit device having overcurrent...

2011-08-23

2011-08-23

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S103000

Reexamination Certificate

active

08004809

ABSTRACT:
A semiconductor integrated circuit device includes an output transistor, an overcurrent detection circuit and overcurrent limitation circuit. The overcurrent detection circuit includes a first transistor detecting an overcurrent of the output transistor. The overcurrent limitation circuit is connected between a gate and a source of the output transistor. The overcurrent limitation circuit includes a plurality of resistance elements and a diode connected in series between the gate and the source of the output transistor in series, and a second transistor whose gate is connected to a connection point between the resistance elements and that is cascade connected to the first transistor.

REFERENCES:
patent: 5303110 (1994-04-01), Kumagai
patent: 6538480 (2003-03-01), Takada et al.
patent: 7012792 (2006-03-01), Yoshida
patent: 7158359 (2007-01-01), Bertele et al.
patent: 2003/0117758 (2003-06-01), Yoshida
patent: 2003-197913 (2003-07-01), None

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