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Over-Voltage Interrupt Improvement Circuit Disclosure Number: IPCOM000068084D
Original Publication Date: 1979-Nov-01
Included in the Prior Art Database: 2005-Feb-20

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Related People

Braithwaite, KA Low, PY [+details]


The OVI (over-voltage interrupt) improvement circuit prevents a regulator from operating in the catastrophic over-voltage region where loads, such as logic circuits, would be damaged, but does not shut off the regulator permanently. The circuit monitors the voltage remotely, that is, it does not monitor the local output of the phase-controlled regulator, but monitors remotely at the load using a sense-point capacitor. The OVI circuit intercepts a catastrophic over voltage and holds the regulator in a controlled repetitive off/on sequence until the over voltage subsides, or the regulator is turned off. The improved OVI circuit has the following advantages: 1. Remote sensing instead of local sensing.