LED
Infrared LED
L2388 series
TO-46 style GaAs infrared LED
Features Applications
l High radiant output power l High reliability
l Optical switches l Automatic control systems l Auto-focus
s Absolute maximum ratings (Ta=25 °C)
Parameter Forward current Reverse voltage Pulse forward current Operating temperature Storage temperature Symbol IF VR IFP Topr Tstg Condition Value 80 5 1.0 -30 to +85 -40 to +100 * Unit mA V A °C °C
Pulse width=10 µs Duty ratio=1 %
* L2388 is guaranteed to resist temperature cycle test of up to 5 cycles.
s Electrical and optical characteristics (Ta=25 °C)
Parameter Peak emission wavelength Spectral half width Forward voltage Pulse forward voltage Reverse current Radiant flux Radiant illuminance Rise time Fall time Symbol λp ∆λ VF VFP IR φe PE tr tf Condition IF=50 mA IF=50 mA IF=50 mA IF=1.0 A VR=5 V IF=50 mA IF=50 mA IF=50 mA, 10 to 90 % IF=50 mA, 90 to 10 % Min. 920 4.5 L2388 Typ. 945 45 1.3 2.3 6.0 0.6 1.2 1.3 Max. 970 1.4 2.9 5 2.0 2.0 Min. 920 2.6 L2388-01 Typ. 945 45 1.3 2.3 3.4 1.4 1.2 1.3 Max. 970 1.4 2.9 5 2.0 2.0 Unit nm nm V V µA mW mW/cm2 µs µs
Infrared LED
s Emission spectrum
100 (Typ. Ta=25 ˚C, IF=50 mA)
L2388 series
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
s Radiant flux vs. forward current
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %) 1000
s Forward current vs. forward voltage
1000
RELATIVE RADIANT OUTPUT (%)
RADIANT FLUX (mW)
100
FORWARD CURRENT (mA)
80
100
60
L2388 10
40
L2388-01 1
10
20
0 800
0.1 900 1000 1100
1
10
100
1000
1 1.0
1.5
2.0
2.5
WAVELENGTH (nm)
KLEDB0122EA
FORWARD CURRENT (mA)
KLEDB0209EA
FORWARD VOLTAGE (V)
KLEDB0210EA
s Directivity
(Typ. Ta=25 ˚C) 20˚ 10˚ 0˚ 100 % 30˚ 80 % L2388 30˚ 10˚ 20˚
s Radiant output vs. ambient temperature
(Typ. IF=50 mA) +3
s Allowable forward current vs. ambient temperature
(Typ.)
RELATIVE ALLOWABLE FORWARD CURRENT (%)
RELATIVE RADIANT OUTPUT (dB)
+2 +1 0 -1 -2 -3 -4 -5 -40
100
80
40˚
60 %
L2388-01
40˚
60
50˚ 60˚ 70˚ 80˚ 90˚
40 %
50˚ 60˚
40
20 %
70˚ 80˚ 90˚
20
0 -40 -20 0 20 40 60 80 100
-20
0
20
40
60
80
100
RELATIVE RADIANT OUTPUT (%)
KLEDB0123EA
AMBIENT TEMPERATURE (˚C)
KLEDB0211EA
AMBIENT TEMPERATURE (˚C)
KLEDB0027EB
s Allowable forward current vs. duty ratio
10 (Typ. Ta=25 ˚C)
s Dimensional outlines (unit: mm) ➀ L2388
2.3 ± 0.3
5.4 ± 0.1 CLEAR EPOXY RESIN 4.2 ± 0.1
➁ L2388-01
5.4 ± 0.2 4.65 ± 0.1
ALLOWABLE FORWARD CURRENT (A)
1 PULSE WIDTH=10 µs PULSE WIDTH=100 µs 0.1
1.12 ± 0.1
2.54 ± 0.2
0.45 LEAD 2.54 ± 0.2
0.01 0.01
0.1
1
10
100
DUTY RATIO (%)
KLEDB0038EA
COMMON TO CASE
COMMON TO CASE
KLEDA0009ED
13.5
0.45 LEAD
13.5
4.5 ± 0.2
6.65 ± 0.2
KLEDA0052EB
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. ©2001 Hamamatsu Photonics K.K.
HAMAMATSU PHOTONICS K.K., Solid State Division 1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, http://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.: 8, 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
Cat. No. KLED1012E01 Apr. 2001 DN