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LM3444MA/NOPB.B データシート(PDF) 6 Page - Texas Instruments |
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LM3444MA/NOPB.B データシート(HTML) 6 Page - Texas Instruments |
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6 / 38 page ![]() -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 Submit Documentation Feedback Copyright © 2010–2015, Texas Instruments Incorporated Product Folder Links: LM3444 |
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