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SC606AEVB Datasheet(PDF) 8 Page - Semtech Corporation |
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SC606AEVB Datasheet(HTML) 8 Page - Semtech Corporation |
8 / 18 page 8 © 2005 Semtech Corp. www.semtech.com POWER MANAGEMENT SC606 Applications Information (Cont.) Current Matching Current Matching refers to the ΔI from an LED compared to the average of the minimum and maximum value of all LEDs that are programmed for the same current. I LED-LED-ERR [%] = == = = IMAX IMAX + IMIN -1 100% 2 or IMIN IMAX + IMIN -1 100% 2 which reduces to ± ±± ± ± IMAX - IMIN IMAX + IMIN 100% 1x Mode, 1.5x Mode and 2x Mode 1x Mode, 1.5x Mode and 2x Mode all refer to the charge pump configuration. These modes multiply the input voltage and ensure that V OUT is high enough for current to be regulated in the LEDs. Mode Transition Voltage Mode transition voltage refers to the input voltage at the point when the charge pump changes from a weaker mode (lower numerically) to a stronger mode (higher numerically). V TRANS1X is the transition from 1x to 1.5x mode, and V TRANS1.5X is the transition from 1.5x to 2x mode. |
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