Datasheet LT3745 (Analog Devices) - 10

LT3745
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. LED Current ILED Nominal LED Current vs RISET LED Current vs Dot Correction vs LED Voltage VLED
50 80 80 DC = 0×3F 70 70 40 60 60 50 DC = 0×20 50 30 (mA) (mA) 40 (mA) 40 I LED 20 I LED 30 I LED 30 DC = 0×00 20 20 10 10 10 0 0 0 40 80 120 160 200 240 280 320 1 8 16 24 32 40 48 56 64 0 0.5 1.0 1.5 2.0 2.5 3.0 R DOT CORRECTION +1 ISET (kΩ) V 3745 G28 LED (V) 3745 G27 3745 G29
LED Current Variation ILED vs Temperature Short LED Threshold vs VISN TSET Current vs ISET Current
51.0 30 20 24 16 50.5 18 12 (V) (mA) 50.0 (µA) LED I LED V 12 I TSET 8 49.5 6 4 49.0 0 0 –50 –25 0 25 50 75 100 125 0 8 16 24 32 40 0 4 8 12 16 20 JUNCTION TEMPERATURE (°C) VISN (V) IISET (µA) 3745 G30 3745 G31 3745 G32
LED Current Derating TSET Threshold vs Temperature vs Temperature
700 60 650 50 600 40 550 (mV) (mA) 30 TSET 500 V I LED 20 450 OT = 0 OT = 1 10 400 350 0 –50 –25 0 25 50 75 100 125 80 85 90 95 100 105 110 115 120 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 3745 G34 3745 G33 3745f 10 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Package Description Typical Application Related Parts