Accession Number : ADD016151

Title :   Turn-On Transient Overcurrent Response Suppressor.

Descriptive Note : Patent, Filed 18 Mar 92, patented 26 Oct 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kirkpatrick, Thomas I

Report Date : 26 Oct 1993

Pagination or Media Count : 5

Abstract : A turn-on transient overcurrent response suppressor is connected to an existing electrical circuit having a regulator circuit that includes an overcurrent protection mechanism. A first charging circuit is connected to the power supply for simultaneous charging therewith. A second charging circuit is connected to the first charging circuit for delayed charging therewith. Connected between the first and second charging circuits is a circuit to create a low impedance discharge path for the second charging circuit while preventing discharge of the first charging circuit when the power supply is no longer providing the input voltage. First and second transistor circuits are connected to turn on during the charging and discharging of the second charging circuit and turn off when the second charging circuit is fully charged. In this way, turn-on transients caused by loss of AC power are prevented from falsely triggering the regulator circuit's overcurrent protection mechanism. The suppressor is particularly useful when a driven load is an active device.

Descriptors :   *CIRCUITS, *POWER SUPPLIES, *SUPPRESSORS, *ELECTRIC CURRENT, *VOLTAGE REGULATORS, *PATENTS, IMPEDANCE, INPUT, PATHS, PROTECTION, REGULATORS, TRANSIENTS, TRANSISTORS, VOLTAGE, DIRECT CURRENT, INTEGRATED CIRCUITS, ELECTRICAL RESISTANCE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE