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LM3444MA Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce LM3444MA
Description  AC-DC Offline LED Driver
Download  30 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3444MA Fiches technique(HTML) 5 Page - Texas Instruments

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-50 -30 -10 10 30 50 70 90 110130150
1.25
1.26
1.27
1.28
1.29
TEMPERATURE (°C)
OFF Threshold at C11
VBUCK (V)
1.50
1.25
1.00
0.75
0.50
0.25
0
50
100
150
200
3 LEDs
5 LEDs
7 LEDs
9 LEDs
Series
connected LEDs
8.0
7.5
7.0
6.5
6.0
-50
-25
0
25
50
75
100 125 150
UVLO (VCC) Rising
UVLO (VCC) Falling
TEMPERATURE (°C)
200.0
190.0
180.0
170.0
160.0
150.0
-50
-25
0
25
50
75
100 125 150
TEMPERATURE (°C)
LINE VOLTAGE (VAC)
300k
250k
200k
150k
100k
50k
0
80
90
100
110
120
130
140
C11 = 2.2 nF, R3 = 348 k:
7 LEDs in Series (VO = 24.5V)
LINE VOLTAGE (VAC)
95.0
90.0
85.0
80.0
75.0
80
90
100
110
120
130
140
14 Series connected LEDs
10 Series connected LEDs
LM3444
www.ti.com
SNVS682C – NOVEMBER 2010 – REVISED MAY 2013
TYPICAL PERFORMANCE CHARACTERISTICS
fSW vs Input Line Voltage
Efficiency vs Input Line Voltage
Figure 3.
Figure 4.
V UVLOCC vs Temperature
Min On-Time (tON) vs Temperature
Figure 5.
Figure 6.
Off Threshold (C11) vs Temperature
Normalized Variation in fSW over VBUCK Voltage
Figure 7.
Figure 8.
Copyright © 2010–2013, Texas Instruments Incorporated
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