HAMAMATSU L2791-03, L2791 Datasheet
LED
Infrared LED
L2791 series
Small emission spot LED using current confined chip
L2791 is infrared LED with a microball lens cemented to the current confined chip surface. This combination ensures high directivity and improved
emission uniformity. In particular, L2791-02 uses a lens cap that delivers even narrower directivity. As a variant type not using a microball lens,
L2791-03 is also available with the LED chip potted with resin, which gives a small emission spot of φ160 µm.
Features
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Small emission spot
L2791 : φ400 µm
L2791-03: φ160 µm
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Uniform emission: L2791/-02
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Narrow directivity: L2791/-02
Absolute maximum ratings (Ta=25 °C)
■
Parameter Symbol Condition Value Unit
Forward current I
Reverse voltage V
Pulse forward current I
Operating temperature
Storage temperature Tstg -40 to +100 *
* L2791-03 is guaranteed to resist temperature cycle test of up to 5 cycles.
F
R
Pulse width=10 µs
FP
Duty ratio=1 %
Topr -30 to +85
Applications
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Automatic control systems
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Optical switches
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Auto-focus
80 mA
3 V
0.5 A
C
°
C
°
Electrical and optical characteristics (Ta=25 °C)
■
Parameter Symbol Condition
Peak emission
wavelength
Spectral half width
Forward voltage VFIF=50 mA - 1.5 1.7 - 1.5 1.7 - 1.5 1.7 V
Pulse forward voltage V
Reverse current IRVR=3 V --10--10--10µA
Radiant flux
Radiant illuminance PEIF=50 mA -1.3--2.0----mW/cm
Rise time tr IF=50 mA, 10 to 90 % - 0.12 0.2 - 0.12 0.2 - 0.12 0.2 µs
Fall time tf IF=50 mA, 90 to 10 % - 0.12 0.2 - 0.12 0.2 - 0.12 0.2 µs
λ
∆λ
φ
=50 mA 850 880 910 850 880 910 850 880 910 nm
I
F
p
IF=50 mA - 60 - - 60 - - 60 - nm
=0.5 A - 3.2 4.0 - 3.2 4.0 - 3.2 4.0 V
FPIF
IF=50 mA 1.6 2.0 - 1.6 2.0 - 4.0 5.0 - mW
e
L2791 L2791-02 L2791-03
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
Unit
2
1
Infrared LED
1.12 ± 0.1
CLEAR EPOXY RESIN
5.4 ± 0.1
4.2 ± 0.1
0.45
LEAD
2.54 ± 0.2
2.3 ± 0.3
13.5
COMMON TO CASE
1.0 1.5 2.0 2.5 3.0 3.5
1
10
1000
100
FORWARD VOLTAGE (V)
FORWARD CURRENT (mA)
(Typ. Ta=25 ˚C, tw=100 µs, 1 %)
-40 -20 0 20
(Typ.)
40 60 80 100
0
40
60
80
100
AMBIENT TEMPERATURE (˚C)
RELATIVE ALLOWABLE FORWARD CURRENT (%)
20
L2791 series
■ Emission spectrum
100
80
60
40
20
RELATIVE RADIANT OUTPUT (%)
0
700 800 900 1000
(Typ. Ta=25 ˚C, IF=50 mA)
WAVELENGTH (nm)
■ Directivity
10˚0˚10˚
20˚
30˚
40˚
50˚
60˚
70˚
80˚
90˚
L2791-02
020406080100 20 40 60 80 100
RELATIVE RADIANT OUTPUT (%)
* L2791-03: Except for reflection ingredient of the base.
■ ■
■ Dimensional outlines (unit: mm)
■ ■
20˚
L2791
L2791-03 *
(Typ. Ta=25 ˚C)
30˚
40˚
50˚
■ Radiant flux vs. forward current
100
10
1
RADIANT FLUX (mW)
0.1
KLEDB0158EA KLEDB0160EA
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
L2791-03
L2791, L2791-02
101
FORWARD CURRENT (mA)
100 1000
■ Radiant output vs. ambient
temperature
(Typ. IF=50 mA)
60˚
70˚
80˚
90˚
KLEDB0161EA
+1
0
-1
-2
RELATIVE RADIANT OUTPUT (dB)
-3
-40 -20 0 20 40 60 80 100
AMBIENT TEMPERATURE (˚C)
■ Forward current vs. forward voltage
KLEDB0159EA
■ Allowable forward current vs.
ambient temperature
KLEDB0162EA
KLEDB0027EB
➂ L2791-03➁ L2791-02➀ L2791
5.4 ± 0.2
4.7 ± 0.1
GLASS WINDOW
3.0 ± 0.1
3.6 ± 0.2
0.45
LEAD
13.5
0.45
LEAD
2.54 ± 0.2
COMMON TO CASE
COMMON TO CASE
KLEDA0060EA
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
2
5.4 ± 0.2
4.65 ± 0.1
2.54 ± 0.2
6.65 ± 0.213.5
4.5 ± 0.2
KLEDA0059EA
KLEDA0058EA
Cat. No. KLED1021E01
Apr. 2001 DN
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