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LM3444MA/NOPB.B Scheda tecnica(PDF) 6 Page - Texas Instruments

Il numero della parte LM3444MA/NOPB.B
Spiegazioni elettronici  LM3444 AC-DC Offline LED Driver
PDF  38 Pages
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Produttore elettronici  TI2 [Texas Instruments]
Homepage  https://www.ti.com
Logo TI2 - Texas Instruments

LM3444MA/NOPB.B Scheda tecnica(HTML) 6 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
SNVS682D – NOVEMBER 2010 – REVISED DECEMBER 2015
www.ti.com
6.6 Typical Characteristics
Figure 1. fSW vs Input Line Voltage
Figure 2. Efficiency vs Input Line Voltage
Figure 3. VCC UVLO vs Temperature
Figure 4. Minimum On-Time (tON) vs Temperature
Figure 6. Normalized Variation in fSW Over VBUCK Voltage
Figure 5. Off Threshold (C11) vs Temperature
6
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Product Folder Links: LM3444



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