Datasheet

LT3745
10
3745f
Typical perForMance characTerisTics
Short LED Threshold vs V
ISN
T
SET
Current vs I
SET
Current
T
SET
Threshold vs Temperature
LED Current Derating
vs Temperature
LED Current vs Dot Correction
LED Current I
LED
vs LED Voltage V
LED
LED Current Variation I
LED
vs Temperature
81
0
I
LED
(mA)
10
80
70
60
50
40
30
20
16
24 32 40 48 56 64
DOT CORRECTION +1
3745 G28
JUNCTION TEMPERATURE (°C)
–50
49.0
I
LED
(mA)
49.5
50.0
50.5
51.0
–25 0 25
50 75 100 125
3745 G30
0
0
I
TSET
(µA)
20
12
16
8
4
4 8 12 16 20
I
ISET
(µA)
3745 G32
80
0
10
I
LED
(mA)
60
40
50
30
20
85 90 95 100 120105 110 115
JUNCTION TEMPERATURE (°C)
3745 G34
OT = 0
OT = 1
–50
350
450
400
V
TSET
(mV)
700
600
650
550
500
–25 0 25 50 12575 100
JUNCTION TEMPERATURE (°C)
3745 G33
0
0
V
LED
(V)
30
18
24
12
6
8 16 24 32 40
V
ISN
(V)
3745 G31
0
10
80
70
60
50
40
30
20
0
I
LED
(mA)
0.5 1.0 1.5 2.0 2.5 3.0
V
LED
(V)
3745 G29
DC = 0×3F
DC = 0×20
DC = 0×00
T
A
= 25°C, unless otherwise noted.
Nominal LED Current vs R
ISET
3745 G27
40
0
I
LED
(mA)
10
50
40
30
20
80 120 160 200 240 280 320
R
ISET
(kΩ)