Features
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Lead frame package with position reference hole
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Small package
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High radiant output power
Applications
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Auto-focus
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Optical switch
LED
Infrared LED
High radiant output GaAs LED with position reference hole
L6437 series
■ Absolute maximum ratings (Ta=25 °C)
Parameter Symbol Condition Value Unit
Forward current IF65 mA
Reverse voltage VR5 V
Pulse forward current IFP Pulse width=10 µs
Duty ratio=1 % 1.0 A
Operating temperature Topr -25 to +80 °C
Storage temperature Tstg -30 to +100 °C
■ Electrical and optical characteristics (Ta=25 °C)
Parameter Symbol Condition Min. Typ. Max. Unit
Peak emission wavelength λpIF=50 mA 920 945 970 nm
Spectral half width ∆λ IF=50 mA -60 -nm
Forward voltage VFIF=50 mA - 1.35 1.45 V
Pulse forward voltage VFP IF=1.0 A -2.5 3.1 V
Reverse current IRVR=5 V - - 20 µA
Radiant flux φeIF=50 mA 7.0 10.0 -mW
Radiant illuminance PEIF=50 mA - 0.5 - mW/cm2
Rise time tr IF=50 mA, 10 to 90 % -2.0 3.0 µs
Fall time tf IF=50 mA, 90 to 10 % - 1.0 2.0 µs
1
PREVIOUSDATA
Infrared LED
L6437 series
■ Emission spectrum
KLEDB0181EA
■ Radiant flux vs. forward current
KLEDB0182EA
■ Forward current vs. forward voltage
KLEDB0183EA
■ Directivity
KLEDB0071EB
■ Radiant output vs. ambient temperature
KLEDB0184EA
■ Allowable forward current vs. ambient temperature
KLEDB0027EB
800 900 1000 1100
0
40
20
60
80
100
WAVELENGTH (nm)
RELATIVE RADIANT OUTPUT (%)
(Typ. Ta=25 ˚C, I
F
=50 mA)
FORWARD CURRENT (mA)
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
RADIANT FLUX (mW)
0.1
0.1
10
1
1000
100
101 100 1000
FORWARD VOLTAGE (V)
(Typ. Ta=25 ˚C, tw=100 µs, 1 %)
FORWARD CURRENT (mA)
1.0 1.5
1
1000
100
10
2.0 2.5 3.0
(Typ. Ta=25 ˚C)
80 %
100 %
40 %
60 %
20 %
20˚10˚0˚10˚20˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
RELATIVE RADIANT OUTPUT (%)
-40 -20 0 20 40 60 80 100
-5
-3
-4
-2
0
-1
+1
+2
AMBIENT TEMPERATURE (˚C)
RELATIVE RADIANT OUTPUT (dB)
(Typ. I
F
=50 mA)
-40 -20 0 20
(Typ.)
40 60 80 100
0
40
60
80
100
AMBIENT TEMPERATURE (˚C)
RELATIVE ALLOWABLE FORWARD CURRENT (%)
20
2
Infrared LED
L6437 series
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
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
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed f or possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2006 Hamamatsu Photonics K.K.
Cat. No. KLED1027E02
Jun. 2006 DN
■ Allowable forward current vs. duty ratio
KLEDB0290EA
4.1 ± 0.2
(INCLUDING BURR)
1.905
(1.25)
1.95 ± 0.4 1.95 ± 0.4
0.51.77
0.9
+0.06
(REFERENCE HOLE)
4.0 ± 0.1
(1.25)
1.905
4.8 ± 0.1
5˚
6.0 ± 0.06
0.8
+0.06
-0
-0
R0.4
+0.03
-0
7.9 ± 0.3
0.25
10˚
4.7 ± 0.1
5.0 ± 0.2
(INCLUDING BURR)
5˚
10˚
NC
CATHODE
ANODE
NC
CATHODE
CATHODE
0.8 ± 0.1
1.8 ± 0.1
■ Dimensional outlines (unit: mm)
➀ L6437
4.1 ± 0.2
(INCLUDING BURR)
1.905
1.95 ± 0.4 1.95 ± 0.4
0.51.77
0.9
+0.06
(REFERENCE HOLE)
4.0 ± 0.1
1.5 ± 0.4
1.905
4.8 ± 0.1
5˚
6.0 ± 0.06
0.8
+0.06
-0
-0
R0.4
+0.03
-0
7.9 ± 0.3
0.25
1.5 ± 0.4
10˚
4.7 ± 0.1
5.0 ± 0.2
(INCLUDING BURR)
5˚
10˚
7.0 ± 0.3
NC
CATHODE
ANODE
NC
CATHODE
CATHODE
0.8 ± 0.1
1.8 ± 0.1
0.25
0.7 ± 0.3 0.7 ± 0.3
0.1 ± 0.1
KLEDA0062EAKLEDA0031EB
➁ L6437-01
DUTY RATIO (%)
ALLOWABLE FORWARD CURRENT (mA)
0.01 0.1 1 10 100
10
100
1000
10000 (Typ. Ta=25 ˚C)
PULSE WIDTH=1 µs
PULSE WIDTH=100 µs
PULSE WIDTH=10 µs
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