Method and related circuit for protection against...

Details Method and related circuit for protection against... Method and related circuit for protection against...

2011-03-08

2011-03-08

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C361S018000

Reexamination Certificate

active

07902804

ABSTRACT:
A method and the related circuit protect against malfunctioning of the feedback loop in switching power supplies. More particularly, the circuit identifies a condition of excessively high voltage at the output. In one embodiment the circuit for the protection against malfunctioning of the feedback loop of a switching power supply comprises: circuitry that generates a voltage proportional to the output voltage of the switching power supply; a comparator for comparing the voltage proportional to the output voltage with a reference voltage; a counter coupled to the comparator and capable of supplying an output signal when said voltage proportional to the output voltage exceeds said reference voltage a threshold number of times; said output signal is indicative of a malfunctioning of the feedback loop.

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patent: 2002/0181179 (2002-12-01), Balakrishnan et al.
patent: 2005091481 (2005-09-01), None

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