LED
Infrared LED
L9437
LED emitting collimated light for optical encoder
L9437 is an infrared LED developed for optical encoders. By improving the aspherical lens used with the previous type L8506, we have achieved
an even more highly collimated beam of near infrared light. The lead pin of L9437 has no step piece that is usually formed at the lead base brazed
to the package, thus eliminating the restriction in printed circuit board design.
Features
Applications
l
Collimated light beam
l
Uniform light spot
l
Narrow directivity: ±5˚
l
High-speed response: 40 MHz Typ.
l
High reliability
l
Optical encoder
s
Absolute maximum ratings (Ta=25
°C,
unless otherwise noted)
Parameter
Reverse voltage
Forward current
Forward current reduction rate
Pulse forward current
P ulse forw ard current reduction ra te
Power dissipation
Operating temperature
Storage temperature
Symbol
V
R
I
F
-
I
FP
-
P
Topr
Tstg
Condition
Value
5
80
0.67
0.5
4.2
150
-30 to +85
-40 to +100
Unit
V
mA
mA/°C
A
mA/°C
mW
°C
°C
Pulse width=10 µs
Duty ratio=1 %
s
Electrical and optical characteristics (Ta=25
°C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Peak emission wavelength
I
F
=30 mA
840
870
900
nm
λp
Spectral half width
I
F
=30 mA
-
45
-
nm
∆λ
Optical output *
1
Pe
I
F
=30 mA
1.25
1.6
-
mW
Forward voltage
V
F
I
F
=30 mA
-
1.5
1.65
V
Reverse current
I
R
V
R
=5 V
-
-
5
µA
2
3
Light spot size *
Bw
I
F
=30 mA
4.0 *
4.3
-
mm
4
Cut-off frequency *
fc
I
F
=30 mA ± 4 mAp-p
25
40
-
MHz
*1: Measured with a photodiode (active area:
φ8
mm) installed 25 mm away from LED stem undersurface.
*2: Full width at half maximum of beam spot measured with an image sensor installed 13 mm away from LED stem undersurface.
*3: Reference value
*4: Frequency at which the optical output drops by -3 dB from that at 100 kHz.
1
Infrared LED
s
Emission spectrum
100
(Typ. Ta=25 ˚C, I
F
=30 mA)
L9437
(Typ. Ta=25 ˚C)
s
Optical output vs. forward current
(Typ. Ta=25 ˚C)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
s
Forward current vs. forward voltage
100
90
RELATIVE RADIANT OUTPUT (%)
FORWARD CURRENT (mA)
80
OPTICAL OUTPUT (mW)
80
70
60
50
40
30
20
10
0
60
40
20
0
700
0
800
900
1000
0
20
40
60
80
100
0
0.5
1.0
1.5
2.0
WAVELENGTH (nm)
KLEDB0218EA
FORWARD CURRENT (mA)
KLEDB0303EA
FORWARD VOLTAGE (V)
KLEDB0227EB
s
Directivity
(Typ. Ta=25 ˚C)
20˚
10˚
0˚
100
%
10˚
20˚
s
Radiant output vs. ambient
temperature
+2
30˚
(Typ. I
F
=50 mA)
s
Allowable forward current vs. ambient
temperature
(Typ.)
RELATIVE ALLOWABLE FORWARD CURRENT (%)
RELATIVE RADIANT OUTPUT (dB)
30˚
80
%
100
+1
80
40˚
60
%
40˚
0
60
50˚
60˚
70˚
80˚
90˚
40
%
50˚
60˚
-1
40
20 %
70˚
80˚
90˚
-2
20
-3
0
20
40
60
80
100
0
-40
-20
0
20
40
60
80
100
RELATIVE RADIANT OUTPUT (%)
KLEDB0226EA
AMBIENT TEMPERATURE (˚C)
KLEDB0228EA
AMBIENT TEMPERATURE (˚C)
KLEDB0229EB
s
Allowable forward current vs.
duty ratio
10000
(Typ. Ta=25 ˚C)
s
Light intensity distribution
100
(Typ. Ta=25 ˚C)
L=10
mm
s
Dimensional outline (unit: mm)
5.4 ± 0.2
4.65 ± 0.15
ALLOWABLE FORWARD CURRENT (mA)
RELATIVE RADIANT OUTPUT (%)
80
L=15
mm
PULSE WIDTH=10 µs
60
(0.4)
1000
3.7 ± 0.2
PULSE WIDTH=1 µs
L=25
mm
40
100
PULSE WIDTH=100 µs
20
LED
L
0
IMAGE
SENSOR
0.45 ± 0.05
LEAD
2.54 ± 0.2
10
0.01
0.1
1
10
100
-5
-4
-3
-2
-1
0
1
2
3
4
5
DUTY RATIO (%)
KLEDB0288EA
POSITION ON IMAGE SENSOR (mm)
KLEDB0263EB
COMMON TO CASE
13.5 ± 1.0
KLEDA0082EA
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2007 Hamamatsu Photonics K.K.
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184, www.hamamatsu.com
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Cat. No. KLED1045E03
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
0.1 MAX.
Aug. 2007 DN
2
5.3 ± 0.3
RF/Wirelessly
京公网安备 11010802033920号
EEWORLD
