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LM3431 Datasheet(PDF) 8 Page - Texas Instruments

No. de pieza LM3431
Descripción Electrónicos  3-Channel Constant Current LED Driver with Integrated Boost Controller
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM3431 Datasheet(HTML) 8 Page - Texas Instruments

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ILED
5 mA/Div
Vcathode
100 mV/Div
REFIN
10 mV/Div
1 Ps/DIV
400 ns/DIV
ILED
50 mA/Div
NDRV (FET)
2V/Div
NDRV (NPN)
1V/Div
DIM
5V/Div
Vout
100 mV/Div
Vsw
20V/Div
ILED
200 mA/Div
400 Ps/DIV
200 Ps/DIV
Vout
200 mV/Div
ILED
5 mA/Div
VIN
5V/Div
0.94
0.96
0.98
1.00
1.02
1.04
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
INPUT VOLTAGE (V)
50
60
70
80
90
100
5
9
13
17
21
100%
dimming duty
10%
50%
LM3431
SNVS547F – NOVEMBER 2007 – REVISED MARCH 2009
www.ti.com
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise specified the following conditions apply: VIN = 12V, TJ = 25°C.
Normalized Switching Frequency
Efficiency vs.
vs. Temperature (700 kHz)
Input Voltage LED Current = 140 mA x 3, LED Vf = 25V
Figure 8.
Figure 9.
Line Transient Response
Dimming Transient Response
Figure 10.
Figure 11.
LED Ripple Current
NDRV Waveforms
Figure 12.
Figure 13.
8
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Copyright © 2007–2009, Texas Instruments Incorporated
Product Folder Links: LM3431


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