90
80
70
60
50
40
30
20
10
0
1.0
AlGaAs
RED
RED
YELLOW
GREEN/EMERALD GREEN
2.0
3.0
4.0
5.0
VF – FORWARD VOLTAGE – V
2.5
2.0
HER, YELLOW,
EMERALD GREEN
1.5
1.0
AlGaAs RED
0.5
0
0 5 10 15 20 25 30
IDC – DC CURRENT PER LED – mA
1.3
EMERALD GREEN
1.2
YELLOW
1.1
RED/ORANGE
1.0
GREEN
0.9
0.8
AlGaAs RED
0.7
0.6
0.5
0.4
0 10 20 30 40 50 60 70 80 90
IPEAK – PEAK SEGMENT CURRENT – mA
Figure 2. Forward current vs. forward voltage
characteristics. VF (300 mA) for AlGaAs Red
= 2.6 volts typical.
Figure 3. Relative luminous intensity vs. DC
forward current.
Figure 4. Relative efficiency (luminous
intensity per unit current) vs. LED peak
current. hv (300 mA) for AlGaAs Red = 0.7.
4.0
10
9
8
3.0
7
6
5
4
2.0
3
1.5
2
1.0
1
10
100
1000 10,000
tP – PULSE DURATION – µs
HER, ORANGE, YELLOW, and GREEN
Figure 5. Maximum tolerable peak current vs. peak duration.
(IPEAK MAX determined from temperature derated IDC MAX).
1
1
10
100
1000 10000
tp – PULSE DURATION – µs
AlGaAs RED
10° 0°
20°
1.0
30°
40°
0.8
50°
0.6
60°
0.4
70°
80°
0.2
90°
10° 20° 30° 40° 50° 60° 70° 80° 90° 100°
Figure 6. Relative luminous intensity vs. angular displacement.
5