Excess current protection circuit for a power supply

Details Excess current protection circuit for a power supply Excess current protection circuit for a power supply

1982-08-27

1984-07-10

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361101, H02H 308

Patent

active

044596308

ABSTRACT:
A power supply having a protection circuit for interrupting the current flow from the power supply upon the occurrence of an excessive current drain from the output of the power supply and for automatically restoring the power supply output upon a termination of the excessive current drain and a subsequent recycling of the power supply input. In a specific embodiment, the protection circuit interrupts the output of a direct current (D.C.) to direct current (D.C.) inverter to protect the oscillator and other circuit components from a current overload produced by an excessive current drain which produces a drop in the output voltage. A transistor in series with the output current is maintained in a conducting state by a control transistor supplying base current thereto. The control transistor is turned off by a drop in the output voltage while a start-up capacitor provides a current path to the base of the control transistor to restart the power supply output upon by a recycling of the input to the power supply.

REFERENCES:
patent: 3106674 (1963-10-01), Hamilton
patent: 3204175 (1961-09-01), Kuriger
patent: 3319150 (1967-05-01), Elich et al.
patent: 3377540 (1968-04-01), Meyer
patent: 3391330 (1965-10-01), Grossoehme
patent: 3493878 (1967-02-01), Fautale
patent: 3541425 (1968-06-01), Weidmann
patent: 3546566 (1968-11-01), Marzolf
patent: 3886410 (1975-05-01), Seer, Jr.
"Regulator with Shut Down at Short Circuit", Ser, Electronic Engineering, Oct. 1978, vol. 50, No. 613.

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