LT3745 Просмотр технического описания (PDF) - Linear Technology
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LT3745 Datasheet PDF : 28 Pages
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LT3745
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Nominal LED Current vs RISET
50
40
30
20
10
0
40 80 120 160 200 240 280 320
RISET (kΩ)
3745 G27
LED Current vs Dot Correction
80
70
60
50
40
30
20
10
0
1 8 16 24 32 40 48 56 64
DOT CORRECTION +1
3745 G28
LED Current ILED
vs LED Voltage VLED
80
DC = 0×3F
70
60
50
DC = 0×20
40
30
DC = 0×00
20
10
0
0 0.5 1.0 1.5 2.0
VLED (V)
2.5 3.0
3745 G29
LED Current Variation ILED
vs Temperature
51.0
50.5
50.0
49.5
49.0
–50
–25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3745 G30
Short LED Threshold vs VISN
30
24
18
12
6
0
0
8
16
24
32
40
VISN (V)
3745 G31
TSET Current vs ISET Current
20
16
12
8
4
0
0
4
8
12
16
20
IISET (µA)
3745 G32
10
TSET Threshold vs Temperature
700
650
600
550
500
450
400
350
–50 –25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
3745 G33
LED Current Derating
vs Temperature
60
50
40
30
20
OT = 0
OT = 1
10
0
80 85 90 95 100 105 110 115 120
JUNCTION TEMPERATURE (°C)
3745 G34
3745f
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