LED DRIVER
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United States of America Patent
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Feb 19, 2016
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Mar 9, 2015
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Abstract
LED driver (1) comprising a switched-mode power converter (10) for providing power to an LED arrangement (100) connected across output terminals of the converter (10), and wherein the converter (10) comprises a number of energy storage elements (L, C) and a first semiconductor switch (Q1); a second semiconductor switch (Q2) connected in series with the LED arrangement (100); a control means (11) realized to generate a second control signal (G2) for the second semiconductor switch (Q2), such that a transition of the second control signal (G2) is delayed relative to a corresponding transition of a first control signal (G 1) for the first semiconductor switch (Q 1). The invention further describes a projection arrangement (2); and a method of driving an LED arrangement (100).
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