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LM3444MANOPB Arkusz danych(PDF) 5 Page - Texas Instruments |
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LM3444MANOPB Arkusz danych(HTML) 5 Page - Texas Instruments |
5 / 30 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 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 Submit Documentation Feedback 5 Product Folder Links: LM3444 |
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