Datasheet LT3590 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 48V Buck Mode LED Driver in SC70 and 2mm × 2mm DFN |
| Pages / Page | 16 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Sense Voltage (VIN – VLED). … |
| File Format / Size | PDF / 237 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Sense Voltage (VIN – VLED). Switching Current Limit. vs VCTRL. vs Duty Cycle. vs Temperature
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LT3590
TYPICAL PERFORMANCE CHARACTERISTICS Sense Voltage (VIN – VLED) Switching Current Limit Switching Current Limit vs VCTRL vs Duty Cycle vs Temperature
0.25 150 150 VIN = 48V TA = 25°C ILED = 50mA 140 140 ) T 0.20 A = 25°C LED 130 -V 130 IN 0.15 120 120 110 110 0.10 100 100 SENSE VOLTAGE (V 0.05 SWITCHING CURRENT LIMIT (mA) 90 SWITCHING CURRENT LIMIT (mA) 90 0 80 80 0 0.5 1 1.5 2 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 VCTRL (V) DUTY CYCLE (%) TEMPERATURE (°C) 3590 G09 3590 G10 3590 G11
Sense Voltage (VIN – VLED) Sense Voltage (VIN – VLED) Switching Frequency over vs VIN vs Temperature Temperature
206 206 1000 ILED = 50mA VIN = 48V 10 WHITE LEDs 204 TA = 25°C 204 950 202 202 900 (mV) (mV) 200 LED LED 200 850 -V -V IN IN V V 198 198 800 196 196 SWITCHING FREQUENCY (KHz) 750 194 194 700 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3590 G12 3590 G13 3590 G14
Internal Regulator Internal Regulator Internal Regulator Line Regulation Load Regulation VREG vs Temperature
3.40 3.40 3.40 T T V A = 25°C A = 25°C CTRL = 3.3V VCTRL = 0V ILOAD = 1mA ILOAD = 0V V 3.35 3.35 CTRL = 0V 3.35 ILED = 0V (V) (V) (V) 3.30 3.30 3.30 REG REG V VCTRL = 3.3V V VCTRL = 3.3V T REG ILOAD = 1mA ILED = 50mA 3.25 3.25 3.25 3.20 3.20 3.20 0 10 20 30 40 50 60 0 0.2 0.4 0.6 0.8 1 –50 –25 0 25 50 75 100 125 V TEMPERATURE (°C) IN (V) ILOAD (mA) 3590 G15 3590 G16 3590 G17 3590f 5
TYPICAL PERFORMANCE CHARACTERISTICS Sense Voltage (VIN – VLED) Switching Current Limit Switching Current Limit vs VCTRL vs Duty Cycle vs Temperature
0.25 150 150 VIN = 48V TA = 25°C ILED = 50mA 140 140 ) T 0.20 A = 25°C LED 130 -V 130 IN 0.15 120 120 110 110 0.10 100 100 SENSE VOLTAGE (V 0.05 SWITCHING CURRENT LIMIT (mA) 90 SWITCHING CURRENT LIMIT (mA) 90 0 80 80 0 0.5 1 1.5 2 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 VCTRL (V) DUTY CYCLE (%) TEMPERATURE (°C) 3590 G09 3590 G10 3590 G11
Sense Voltage (VIN – VLED) Sense Voltage (VIN – VLED) Switching Frequency over vs VIN vs Temperature Temperature
206 206 1000 ILED = 50mA VIN = 48V 10 WHITE LEDs 204 TA = 25°C 204 950 202 202 900 (mV) (mV) 200 LED LED 200 850 -V -V IN IN V V 198 198 800 196 196 SWITCHING FREQUENCY (KHz) 750 194 194 700 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) TEMPERATURE (°C) 3590 G12 3590 G13 3590 G14
Internal Regulator Internal Regulator Internal Regulator Line Regulation Load Regulation VREG vs Temperature
3.40 3.40 3.40 T T V A = 25°C A = 25°C CTRL = 3.3V VCTRL = 0V ILOAD = 1mA ILOAD = 0V V 3.35 3.35 CTRL = 0V 3.35 ILED = 0V (V) (V) (V) 3.30 3.30 3.30 REG REG V VCTRL = 3.3V V VCTRL = 3.3V T REG ILOAD = 1mA ILED = 50mA 3.25 3.25 3.25 3.20 3.20 3.20 0 10 20 30 40 50 60 0 0.2 0.4 0.6 0.8 1 –50 –25 0 25 50 75 100 125 V TEMPERATURE (°C) IN (V) ILOAD (mA) 3590 G15 3590 G16 3590 G17 3590f 5
