Datasheet LT3592 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 500mA Wide Input Voltage Range Step-Down LED Driver with 10:1 Dimming |
| 页数 / 页 | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted). … |
| 文件格式/大小 | PDF / 323 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted). Undervoltage Lockout. Switching Frequency
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LT3592
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted) Undervoltage Lockout Switching Frequency vs Temperature vs Temperature Current Limit During Soft Start
3.4 2300 1400 2100 RT = 48.7k 1200 1900 1700 1000 3.3 1500 800 (kHz) 1300 TAGE LOCKOUT (V) f SW 1100 600 VOL 3.2 RT = 140k 900 400 UNDER 700 SWITCH CURRENT LIMIT (mA) 200 500 RT = 357k 3.1 300 0 –50 0 50 100 150 –50 –30 –10 10 30 50 70 90 110 130 0.5 1 1.5 2 2.5 TEMPERATURE (°C) TEMPERATURE (°C) VSHDN (V) 3592 G10 3592 G11 3592 G12
Frequency Foldback Switch Current Limit Switch Current Limit
2500 1.4 1.50 RT = 48.7k 1.3 1.45 2000 1.2 1.40 1.35 1.1 TYPICAL 1500 1.30 1 1.25 0.9 1000 1.20 FREQUENCY (kHz) 0.8 1.15 0.7 500 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 1.10 0.6 1.05 0 0.5 1.00 600 800 1000 1200 1400 1600 1800 2000 2200 0 20 40 60 80 100 –50 –30 –10 10 30 50 70 90 110 130 SHDN VOLTAGE (mV) DUTY CYCLE (%) TEMPERATURE (°C) 3592 G13 3592 G14 3592 G15
Operating Waveforms, Operating Waveforms Discontinuous Mode
VSW VSW 5V/DIV 5V/DIV VCAP VCAP 10mV/DIV 10mV/DIV AC-COUPLED AC-COUPLED IL IL 500mA/DIV 500mA/DIV 3592 G16 500ns/DIV 3592 G17 500ns/DIV 3592fc 5
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C, unless otherwise noted) Undervoltage Lockout Switching Frequency vs Temperature vs Temperature Current Limit During Soft Start
3.4 2300 1400 2100 RT = 48.7k 1200 1900 1700 1000 3.3 1500 800 (kHz) 1300 TAGE LOCKOUT (V) f SW 1100 600 VOL 3.2 RT = 140k 900 400 UNDER 700 SWITCH CURRENT LIMIT (mA) 200 500 RT = 357k 3.1 300 0 –50 0 50 100 150 –50 –30 –10 10 30 50 70 90 110 130 0.5 1 1.5 2 2.5 TEMPERATURE (°C) TEMPERATURE (°C) VSHDN (V) 3592 G10 3592 G11 3592 G12
Frequency Foldback Switch Current Limit Switch Current Limit
2500 1.4 1.50 RT = 48.7k 1.3 1.45 2000 1.2 1.40 1.35 1.1 TYPICAL 1500 1.30 1 1.25 0.9 1000 1.20 FREQUENCY (kHz) 0.8 1.15 0.7 500 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 1.10 0.6 1.05 0 0.5 1.00 600 800 1000 1200 1400 1600 1800 2000 2200 0 20 40 60 80 100 –50 –30 –10 10 30 50 70 90 110 130 SHDN VOLTAGE (mV) DUTY CYCLE (%) TEMPERATURE (°C) 3592 G13 3592 G14 3592 G15
Operating Waveforms, Operating Waveforms Discontinuous Mode
VSW VSW 5V/DIV 5V/DIV VCAP VCAP 10mV/DIV 10mV/DIV AC-COUPLED AC-COUPLED IL IL 500mA/DIV 500mA/DIV 3592 G16 500ns/DIV 3592 G17 500ns/DIV 3592fc 5