System and method for determining output current and converter employing the same
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United States of America Patent
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Jun 19, 2001
Issued Date -
N/A
app pub date -
Aug 13, 1999
filing date -
Aug 13, 1999
priority date (Note) -
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Abstract
A system and method for determining an output current of a power converter having an output capacitor and a component coupled thereto. In one embodiment, the system includes (1) an observer circuit, parallel-coupled to the output capacitor, that senses a voltage across the output capacitor and develops therefrom a capacitor signal representing a current through the output capacitor, (2) a sensor circuit, coupled to the component, that senses a characteristic of the component and develops therefrom a component signal representing a current through the component and (3) a summer circuit, coupled to the observer and sensor circuits, that derives an output signal representing the output current from the capacitor signal and the component signal.
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