Resettable short-circuit protection circuit

Details Resettable short-circuit protection circuit Resettable short-circuit protection circuit

2007-07-03

2010-11-16

Fureman, Jared (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S078000, C361S083000, C361S094000

Reexamination Certificate

active

07835126

ABSTRACT:
A resettable short-circuit protection circuit can terminate excessive fault currents automatically and quickly. The short-circuit protection circuit is switchable and has a low input impedance during normal operation so that there is not a significant voltage drop across the switching elements of the protection circuit. The short-circuit protection circuit allows a power source internal to a portable device to be safely connected to an external accessory where there exists the possibility that the connection could be shorted at the time power is first supplied to the external accessory or a short develops afterwards. After terminating a short-circuit condition, the protection circuit may be reset by cycling an enable signal. The fault termination and reset timing may be configured by selection of internal resistance and capacitance values.

REFERENCES:
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patent: 5684663 (1997-11-01), Mitter
patent: 6804091 (2004-10-01), Jenkins et al.
patent: 2005/0007711 (2005-01-01), Liu et al.
patent: 2005/0077878 (2005-04-01), Carrier et al.
patent: 0 685 917 (1995-12-01), None
patent: 04 368419 (1992-12-01), None
patent: 2000-312433 (2000-11-01), None
patent: 2006-107119 (2006-04-01), None
patent: WO 03/056684 (2003-07-01), None

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