US Patent Application No: 2012/0133,285

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METHOD AND CIRCUIT FOR POWER FACTOR CORRECTION

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Abstract

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A method and circuit for correcting a power factor in an alternating current/direct current power transformer. The circuit has an inductance fed by a rectified AC voltage, and a switch by which the inductance can be charged and discharged by closing and opening the switch, and further has a diode by which the discharge current of the inductance is fed to the output of the circuit. During the discharge phase, a voltage Vmon corresponding to the output voltage VBUS is measured, and the measured values are stored. It is further determined when the discharge current reaches or crosses the zero line at the end of a discharge phase. Switch-on and switch-off signals for actuating the switch are generated by analyzing the information determined. The switch should not be switched on again until a particular minimum switch-off time has been reached.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TRIDONIC GMBH & CO KGDORNBIRN15

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kelly, Jamie Huntsville, AL 6 16

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CIRRUS LOGIC, INC. (1)
* 2010/0328,976 CASCODE CONFIGURED SWITCHING USING AT LEAST ONE LOW BREAKDOWN VOLTAGE INTERNAL, INTEGRATED CIRCUIT SWITCH TO CONTROL AT LEAST ONE HIGH BREAKDOWN VOLTAGE EXTERNAL SWITCH 0 2009
 
MAXIM INTEGRATED PRODUCTS, INC. (1)
* 2010/0225,290 CRITICAL CONDUCTION RESONANT TRANSITION BOOST POWER CIRCUIT 3 2010
 
BENQ CORPORATION (1)
* 2008/0025,056 POWER FACTOR CORRECTION CIRCUITS 1 2007
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TRIDONIC GMBH & CO KG (1)
8,994,286 Operating device for a lamp having a power correction circuit 0 2012
* Cited By Examiner