Datasheet LT1737 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | High Power Isolated Flyback Controller |
| Pages / Page | 28 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Minimum Switch On Time vs. Minimum … |
| File Format / Size | PDF / 386 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Minimum Switch On Time vs. Minimum Enable Time vs. Enable Delay Time vs. Temperature
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LT1737
W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Switch On Time vs Minimum Enable Time vs Enable Delay Time vs Temperature Temperature Temperature
275 275 275 RTON = 50k RMINENAB = 50k 250 250 250 225 225 225 200 200 200 175 175 175 ENABLE DELAY TIME (ns) MINIMUM ENABLE TIME (ns) MINIMUM SWITCH ON TIME (ns) 150 150 150 125 125 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1737 G10 1737 G11 1737 G12
Feedback Amplifier Output Current Feedback Amplifier vs FB Pin Voltage Transconductance vs Temperature
80 1600 µA) µmho) 60 1400 40 T 1200 A = –55°C T 20 A = 25°C 1000 0 800 –20 TA = 125°C 600 –40 400 –60 FEEDBACK AMPLIFIER OUTPUT CURRENT ( –80 200 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 FEEDBACK AMPLIFIER TRANSCONDUCTANCE ( –50 –25 0 25 50 75 100 125 FB PIN VOLTAGE (V) TEMPERATURE (°C) 1737 G13 1737 G14
Soft-Start Charging Current vs Soft-Start Sink Current vs Temperature Temperature
60 2.5 V(SFST) = 0V V(SFST) = 1.5V µA) 50 2.0 40 1.5 30 1.0 20 0.5 10 SOFT-START SINK CURRENT (mA) SOFT-START CHARGING CURRENT ( 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1737 G15 1737 G16 1737fa 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Switch On Time vs Minimum Enable Time vs Enable Delay Time vs Temperature Temperature Temperature
275 275 275 RTON = 50k RMINENAB = 50k 250 250 250 225 225 225 200 200 200 175 175 175 ENABLE DELAY TIME (ns) MINIMUM ENABLE TIME (ns) MINIMUM SWITCH ON TIME (ns) 150 150 150 125 125 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1737 G10 1737 G11 1737 G12
Feedback Amplifier Output Current Feedback Amplifier vs FB Pin Voltage Transconductance vs Temperature
80 1600 µA) µmho) 60 1400 40 T 1200 A = –55°C T 20 A = 25°C 1000 0 800 –20 TA = 125°C 600 –40 400 –60 FEEDBACK AMPLIFIER OUTPUT CURRENT ( –80 200 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 FEEDBACK AMPLIFIER TRANSCONDUCTANCE ( –50 –25 0 25 50 75 100 125 FB PIN VOLTAGE (V) TEMPERATURE (°C) 1737 G13 1737 G14
Soft-Start Charging Current vs Soft-Start Sink Current vs Temperature Temperature
60 2.5 V(SFST) = 0V V(SFST) = 1.5V µA) 50 2.0 40 1.5 30 1.0 20 0.5 10 SOFT-START SINK CURRENT (mA) SOFT-START CHARGING CURRENT ( 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 1737 G15 1737 G16 1737fa 5
