Overcurrent protection apparatus and electronic apparatus

Details Overcurrent protection apparatus and electronic apparatus Overcurrent protection apparatus and electronic apparatus

2009-02-27

2011-10-18

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

08040649

ABSTRACT:
An overcurrent protection apparatus includes two overcurrent protection circuits. The first overcurrent protection circuit compares an electric potential on the downstream side of a first resistance element with a reference potential produced by a second resistance element by a comparator and determines that overcurrent has been caused and intercepts current flowing through a first series regulator when the electric potential on the downstream side of the first resistance element is lower than the reference potential. When the resistance value of the second resistance element is larger than the resistance value of a fourth resistance element of the second overcurrent protection circuit, e.g., 1.2 times the resistance value of the fourth resistance element, the first overcurrent protection circuit intercepts the current flowing through the first series regulator at a current value of 1.2 times a current at which a downstream second series regulator is intercepted by the second overcurrent protection circuit.

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patent: 2006-127253 (2006-05-01), None

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