Datasheet LT1725 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | General Purpose Isolated Flyback Controller |
| Pages / Page | 28 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. VCC Turn-On Voltage vs. VCC … |
| File Format / Size | PDF / 265 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. VCC Turn-On Voltage vs. VCC Hysteresis Voltage vs. Temperature
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LT1725
W U TYPICAL PERFOR A CE CHARACTERISTICS VCC Turn-On Voltage vs VCC Hysteresis Voltage vs Temperature Temperature Start-Up Current vs Temperature
16.00 6.50 250 15.75 6.25 200 15.50 6.00 µA) 150 15.25 5.75 15.00 5.50 100 TURN-ON VOLTAGE (V) 14.75 5.25 HYSTERESIS VOLTAGE (V) CC START-UP CURRENT ( V CCV 50 14.50 5.00 14.25 4.75 0 –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) 1725 G01 1725 G02 1725 G03
UVLO Pin Input Current vs Oscillator Frequency vs Supply Current vs Temperature Temperature Temperature
13 1 115 VUVLO = 1.2V 0 110 12 µA) –1 105 11 –2 100 VUVLO = 1.3V 10 –3 95 SUPPLY CURRENT (mA) –4 9 UVLO PIN INPUT CURRENT ( OSCILLATOR FREQUENCY (kHz) –5 90 8 –6 85 –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) 1725 G04 1725 G05 1725 G06
VC Clamp Voltage, Switching V V GATE vs ISINK CC-VGATE vs ISOURCE Threshold vs Temperature
1.0 0 3.0 –0.5 2.5 CLAMP VOLTAGE 0.8 TA = 125°C –1.0 2.0 0.6 (V) TA = 125°C (V) TA = 25°C GATE –1.5 T 1.5 A = 25°C GATE -V V 0.4 CCV–2.0 1.0 T SWITCHING THRESHOLD A = –55°C 0.2 TA = –55°C –2.5 0.5 CLAMP VOLTAGE, SWITCHING THRESHOLD (V) 0 –3.0 CV 0 1 10 100 1000 1 10 100 1000 –50 –25 0 25 50 75 100 125 ISINK (mA) ISOURCE (mA) TEMPERATURE (°C) 1725 G07 1725 G08 1725 G09 1725fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS VCC Turn-On Voltage vs VCC Hysteresis Voltage vs Temperature Temperature Start-Up Current vs Temperature
16.00 6.50 250 15.75 6.25 200 15.50 6.00 µA) 150 15.25 5.75 15.00 5.50 100 TURN-ON VOLTAGE (V) 14.75 5.25 HYSTERESIS VOLTAGE (V) CC START-UP CURRENT ( V CCV 50 14.50 5.00 14.25 4.75 0 –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) 1725 G01 1725 G02 1725 G03
UVLO Pin Input Current vs Oscillator Frequency vs Supply Current vs Temperature Temperature Temperature
13 1 115 VUVLO = 1.2V 0 110 12 µA) –1 105 11 –2 100 VUVLO = 1.3V 10 –3 95 SUPPLY CURRENT (mA) –4 9 UVLO PIN INPUT CURRENT ( OSCILLATOR FREQUENCY (kHz) –5 90 8 –6 85 –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) 1725 G04 1725 G05 1725 G06
VC Clamp Voltage, Switching V V GATE vs ISINK CC-VGATE vs ISOURCE Threshold vs Temperature
1.0 0 3.0 –0.5 2.5 CLAMP VOLTAGE 0.8 TA = 125°C –1.0 2.0 0.6 (V) TA = 125°C (V) TA = 25°C GATE –1.5 T 1.5 A = 25°C GATE -V V 0.4 CCV–2.0 1.0 T SWITCHING THRESHOLD A = –55°C 0.2 TA = –55°C –2.5 0.5 CLAMP VOLTAGE, SWITCHING THRESHOLD (V) 0 –3.0 CV 0 1 10 100 1000 1 10 100 1000 –50 –25 0 25 50 75 100 125 ISINK (mA) ISOURCE (mA) TEMPERATURE (°C) 1725 G07 1725 G08 1725 G09 1725fa 4
