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IS31BL3508A Datasheet(PDF) 7 Page - Integrated Silicon Solution, Inc |
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IS31BL3508A Datasheet(HTML) 7 Page - Integrated Silicon Solution, Inc |
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7 / 13 page  IS31BL3508A Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 05/10/2013 7 TYPICAL PERFORMANCE CHARACTERISTIC Power Supply(V) 0 10 20 30 40 50 60 70 80 90 100 2.5 3 3.5 4 4.5 5 8 WLEDs ILED = 20mA 10 WLEDs ILED = 20mA 3×8 WLEDs ILED = 160mA Figure 7 Efficiency vs. VCC VCC = 3.6V ILED = 20mA VCC 50mV/Div VOUT 20mV/Div Time(1µs/Div) Figure 9 Ripple Voltage Duty Cycle(%) 0 2040 6080 100 0 5 10 15 20 25 EN Pin Dimming VEN = 2.8V VCC = 3.6V f = 20kHz 8WLEDs Figure 11 Enable Pin Dimming Power Supply(V) 2.5 3 3.5 4 4.5 5 5.5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 8 WLEDs ILED = 20mA Figure 8 VFB vs. VCC VCC = 3.6V ILED = 20mA f = 20kHz VEN 2V/Div IOUT 10mA/Div Time(20µs/Div) Figure 10 PWM Dimming from EN Duty Cycle(%) 0 5 10 15 20 25 020 40 60 80 100 FB Pin PWM Dimming VPWM = 2.8V VCC = 3.6V f = 20kHz 8WLEDs Figure 12 FB pin PWM Dimming |
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