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LM3639AYFQT Datasheet(PDF) 9 Page - Texas Instruments |
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LM3639AYFQT Datasheet(HTML) 9 Page - Texas Instruments |
9 / 28 page 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) 500 kHz. 1 MHz. C022 I LED = 19mA 6 LEDs 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100% 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) 500 kHz. 1 MHz. C022 I LED = 19mA 8 LEDs 60% 65% 70% 75% 80% 85% 90% 95% 100% 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) 6 LEDs 8 LEDs 10 LEDs C022 I LED = 19mA f SW = 500kHz. 60% 65% 70% 75% 80% 85% 90% 95% 100% 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) 2x4 LEDs 2x5 LEDs 2x6 LEDs 2x7 LEDs C022 I LED = 19mA f SW = 500kHz. 0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0 16 32 48 64 80 96 112 128 Brightness Code (#) D1, -40 C D2, -40 C D1, +25 C D2, +25 C D1, +85 C D2, +85 C C020 0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0 16 32 48 64 80 96 112 128 Brightness Code (#) D1, -40 C D2, -40 C D1, +25 C D2, +25 C D1, +85 C D2, +85 C C020 LM3639A www.ti.com SNVS964 – MARCH 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TA = 25°C; VIN = 3.6V; VEN = VIN; CIN= 10 μF, COUTF= 10 μF, COUTB = 1 μF (50V 0805 case size); LF = 1 μH; LB = 22 μH. Figure 21. Backlight LED Current vs Brightness Code Figure 22. Backlight LED Current vs Brightness Code Exponential Linear Figure 23. Backlight Efficiency vs Input Voltage Figure 24. Backlight Efficiency vs Input Voltage Single String Dual String Figure 25. Backlight Efficiency vs Input Voltage Figure 26. Backlight Efficiency vs Input Voltage Single String - 6 LEDs Single String - 8 LEDs Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM3639A |
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