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LT1072CK Datasheet(PDF) 4 Page - Linear Technology |
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LT1072CK Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT1072 1072fc Switch Current Limit vs Duty Cycle Maximum Duty Cycle Flyback Blanking Time DUTY CYCLE (%) 0 4 3 2 1 0 80 LT1072 • TPC01 20 40 60 100 70 10 30 50 90 –55°C 125°C 25°C JUNCTION TEMPERATURE (°C) –75 90 91 93 94 95 –25 25 50 150 LT1072 • TPC02 92 –50 0 75 100 125 96 JUNCTION TEMPERATURE (°C) –75 1.0 1.2 1.6 1.8 2.0 –25 25 50 150 LT1072 • TPC03 1.4 –50 0 75 100 125 2.2 Minimum Input Voltage Switch Saturation Voltage Isolated Mode Flyback Reference Voltage TEMPERATURE (°C) –75 2.3 2.4 2.6 2.7 2.8 –25 25 50 150 LT1072 • TPC04 2.5 –50 0 75 100 125 2.9 SWITCH CURRENT = 1.25A SWITCH CURRENT = 0A SWITCH CURRENT (A) 0 0.8 1.2 2 LT1072 • TPC05 0.4 0 0.5 1 1.5 0.25 0.75 1.25 1.75 1.6 0.6 1.0 0.2 1.4 150°C 100°C –55°C 25°C TEMPERATURE (C°) –75 19 20 21 125 LT1072 • TPC06 18 17 15 –25 25 75 –50 150 0 50 100 16 23 22 RFEEDBACK = 500Ω RFEEDBACK = 1kΩ RFEEDBACK = 10kΩ Line Regulation Reference Voltage and Switching Frequency vs Temperature Feedback Bias Current vs Temperature INPUT VOLTAGE (V) 0 –5 –3 –1 1 10 20 30 40 LT1072 • TPC07 50 3 5 –4 –2 0 2 4 60 TJ = 150°C TJ = – 55°C TJ = 25° C TEMPERATURE (°C) –75 1.242 1.244 1.246 125 LT1072 • TPC08 1.240 1.238 1.234 –25 25 75 –50 150 0 50 100 1.236 1.250 1.248 38 39 40 37 36 34 35 42 41 REFERENCE VOLTAGE SWITCHING FREQUENCY TEMPERATURE (°C) –75 400 500 600 125 LT1072 • TPC09 300 200 0 –25 25 75 –50 150 0 50 100 100 800 700 TYPICAL PERFOR A CE CHARACTERISTICS |
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