LED DRIVING CIRCUIT AND METHOD FOR PROTECTING FROM HIGH VOLTAGE AND DRIVING WITH CONSTANT CURRENT

LED DRIVING CIRCUIT AND METHOD FOR PROTECTING FROM HIGH VOLTAGE AND DRIVING WITH CONSTANT CURRENT

PURPOSE: An LED driver circuit and method are provided to drive an LED module with high efficiency by forming a phase compensation function, a constant current function, and a dimming function into a 1shift converter. CONSTITUTION: A rectifier outputs a rectified power source by rectifying an altern...

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Hauptverfasser: RYU, MYUNG HYO, BEAK, JU WON, KIM, JONG HYUN, YOO, DONG WOOK
Format: Patent
Sprache:eng ; kor
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ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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creator RYU, MYUNG HYO
BEAK, JU WON
KIM, JONG HYUN
YOO, DONG WOOK
description PURPOSE: An LED driver circuit and method are provided to drive an LED module with high efficiency by forming a phase compensation function, a constant current function, and a dimming function into a 1shift converter. CONSTITUTION: A rectifier outputs a rectified power source by rectifying an alternating current to a direct current. A buck-boost converter(13) levels the rectified power source using a circuit which includes an inductor and a capacitor. The buck-boost converter outputs the direct current which is boosted or reduced to an LED module. A current sensing part(15) creates first correction voltage by sensing a current flowing in an output side of the buck-boost converter. A voltage sensing part(16) creates second correction voltage by sensing voltage which is generated in the inductor. A PFC controller(14) controls an output of the buck-boost converter based on the first correction voltage and the second correction voltage.
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subjects ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
title LED DRIVING CIRCUIT AND METHOD FOR PROTECTING FROM HIGH VOLTAGE AND DRIVING WITH CONSTANT CURRENT
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