Discrete hot swap and overcurrent-limiting circuit

Details Discrete hot swap and overcurrent-limiting circuit Discrete hot swap and overcurrent-limiting circuit

2007-07-27

2010-10-12

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S093900

Reexamination Certificate

active

07813095

ABSTRACT:
The present invention is directed towards a discrete protection circuit located on a circuit card, and systems and methods related thereto. The protection circuit protects circuit card components from an inrush current and overcurrent conditions. The discrete protection circuit includes a switch to control a delivered load current to an output port, an SCR which latches when an overcurrent condition is detected across a sense resistor, and a series of resistors and a capacitor that determines the retry delay subsequent to an overcurrent detection. Advantages of the discrete protection circuit of the invention over prior art integrated circuits include: lower parts counts, lower production costs, greater flexibility, and increased reliability.

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“Hot-Plug Protection Circuit”, IBM Technical Disclosure Bulletin, IBM Corp. New York, US vol. 37, No. 9, Sep. 1, 1994, pp. 189-192.

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