Method and apparatus for sensing current in power supplies

Details Method and apparatus for sensing current in power supplies Method and apparatus for sensing current in power supplies

1996-04-19

1997-07-22

Hecker, Stuart N.

Electricity: power supply or regulation systems

Output level responsive

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

363 21, 323358, G05F 140, G05F 156

Patent

active

056507151

ABSTRACT:
A circuit for detecting peak current pulses on a secondary transformer of a power supply and converting these peak current pulses into a direct current (DC) voltages, which can be used for various purposes such as current limiting or current sharing. A peak detection circuit is coupled to the secondary transformer and is employed to detect a peak current pulse through the secondary transformer. A sample and hold circuit that is coupled to the peak detection circuit samples the current through a current sense transformer. The sample and hold circuit provides the current pulse through the secondary transformer in a direct current voltage representation. The sample and hold circuit includes a storage circuit for storing this direct current voltage representation of the current through the secondary transformer. The sample and hold circuit selectively samples the current through the current transformer in response to a control signal generated by the peak detection circuit.

REFERENCES:
patent: 3768012 (1973-10-01), Wilkinson
patent: 3859586 (1975-01-01), Wadlington
patent: 4149233 (1979-04-01), Nagano
patent: 4383293 (1983-05-01), Randall
patent: 5036452 (1991-07-01), Loftus
patent: 5508606 (1996-04-01), Ryczek

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