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SC4538 Datasheet(PDF) 5 Page - Semtech Corporation |
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SC4538 Datasheet(HTML) 5 Page - Semtech Corporation |
5 / 14 page 5 Typical Characteristics SC4538 70 74 78 82 86 90 0 8 16 24 32 40 2.8VIN 3.6VIN 5.5VIN 70 74 78 82 86 90 2.8 3.3 3.9 4.4 5.0 5.5 6 LEDs 4 LEDs 10 LEDs -6 -4 -2 0 2 4 6 0 8 16 24 32 40 Efficiency vs. I BL 0 20 40 60 80 100 0 612 18 24 30 2.8VIN 3.6VIN 5.5VIN Efficiency vs. Input Voltage 70 74 78 82 86 90 2.8 3.3 3.9 4.4 5.0 5.5 10mA 20mA 30mA I BL (mA) V IN (V) 70 74 78 82 86 90 2.8 3.3 3.9 4.4 5.0 5.5 VOUT LED V IN (V) Efficiency vs. Input Voltage Efficiency vs. Output Voltage V OUT (V) Efficiency vs. Input Voltage V IN (V) Normalized I BL vs. Output Voltage V OUT (V) All data taken with V OUT = 20V (6 white LEDs), R ISET = 5.76kΩ (I BL = 20mA), V IN = 3.6V, L = 22μH, and efficiency (η) = P LED /P IN unless otherwise noted. |
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