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LM3639AYFQT Datasheet(PDF) 9 Page - Texas Instruments

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No. de pieza LM3639AYFQT
Descripción Electrónicos  Single Chip 40V Backlight 1.5A Flash LED Driver
Download  28 Pages
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

LM3639AYFQT Datasheet(HTML) 9 Page - Texas Instruments

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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
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Product Folder Links: LM3639A


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