Semiconductor device

Details Semiconductor device Semiconductor device

2007-07-19

2009-10-13

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

07602595

ABSTRACT:
A semiconductor device includes a switching element outputting from a sense terminal a sense current at a fixed rate relative to a main current flowing in the switching element; a sense resistor connected at a first end to the sense terminal and to ground at a second end; a correction current generating circuit that supplies and extracts a correction current to at the first end of the sense resistor; an overcurrent protective circuit that receives a sense voltage generated when the sense current and the correction current flow through the sense resistor, and outputs a stop signal when the sense voltage is larger than a reference voltage; and a driving circuit that stops driving the switching element when the stop signal is received from the overcurrent protective circuit.

REFERENCES:
patent: 2002/0141126 (2002-10-01), Tabata
patent: 2002/0176215 (2002-11-01), Hiyama et al.
patent: 2005/0099751 (2005-05-01), Kumagai
patent: 2006/0006166 (2006-01-01), Chen et al.
patent: 2001-168652 (2001-06-01), None
patent: 2002-26707 (2002-01-01), None
patent: 2002-300017 (2002-10-01), None
patent: 2005-151631 (2005-06-01), None
patent: 2005328606 (2005-11-01), None

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