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LM3639A Fiches technique(PDF) 11 Page - Texas Instruments |
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LM3639A Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 28 page 0 0.5 1 1.5 2 2.5 2.5 3 3.5 4 4.5 5 5.5 V IN (V) C001 T A = +85 ° C T A = +25 ° C and -40°C 0 0.5 1 1.5 2 2.5 2.5 3 3.5 4 4.5 5 5.5 V IN (V) C001 T A = +85°C T A = +25°C T A = -40°C 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) ILED-MAX = 5mA ILED-MAX = 19mA ILED-MAX = 29.5mA C037 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) +25C +85C -40C C036 I LED-MAX = 19mA Brightness Code = 127 PWM Pin = GND 0.000 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 0.020 0 20 40 60 80 100 Duty Cycle (%) 500Hz 1kHz 5kHz 10kHz 25kHz 50kHz 100kHz 500kHz C035 0.0090 0.0095 0.0100 0.0105 0.0110 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 V IN (V) D1, -40C D2, -40C D1, +25C D2, +25C D1, +85C D2, +85C C034 Duty-Cycle = 50% f PWM = 50kHz I LED-MAX = 19mA 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 33. LED Current vs PWM Duty-Cycle Figure 34. LED Current vs Input Voltage w/ PWM Enabled Figure 35. PWM Offset Current vs Input Voltage Figure 36. PWM Offset Current vs Input Voltage Tri-Temp Different Max. LED Current, Brightness Code = 127 Figure 37. Shutdown Current vs. VIN Figure 38. Standby Current vs. VIN EN = 0V EN = VIN Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM3639A |
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