Hamamatsu L2791 Small emission spot led using current confined chip 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
Applications
l Small emission spot
l Automatic control systems
l Optical switches
l Auto-focus
L2791 : φ400 µm
L2791-03: φ160 µm
l Uniform emission: L2791/-02
l Narrow directivity: L2791/-02
■ Absolute maximum ratings (Ta=25 °C)
Parameter
Forward current
Reverse voltage
Symbol
IF
VR
Pulse forward current
IFP
O p era ting te m pe ratu re
Storage temperature
Topr
Tstg
Condition
Value
80
3
Unit
mA
V
0.5
A
-30 to +85
-40 to +100 *
°C
°C
Pulse width=10 µs
Duty ratio=1 %
* L2791-03 is guaranteed to resist temperature cycle test of up to 5 cycles.
■ Electrical and optical characteristics (Ta=25 °C)
Condition
L2791
Typ. Max.
L2791-02
Typ. Max.
L2791-03
Typ. Max.
Parameter
Symbol
Peak emission
wavelength
Spectral half width
Forward voltage
Pulse forward voltage
Reverse current
Radiant flux
Radiant illuminance
Rise time
Fall time
λp
IF=50 mA
850
880
910
850
880
910
850
880
910
nm
∆λ
VF
VFP
IR
φe
PE
tr
tf
IF=50 mA
IF=50 mA
IF=0.5 A
VR=3 V
IF=50 mA
IF=50 mA
IF=50 mA, 10 to 90 %
IF=50 mA, 90 to 10 %
1.6
-
60
1.5
3.2
2.0
1.3
0.12
0.12
1.7
4.0
10
0.2
0.2
1.6
-
60
1.5
3.2
2.0
2.0
0.12
0.12
1.7
4.0
10
0.2
0.2
4.0
-
60
1.5
3.2
5.0
0.12
0.12
1.7
4.0
10
0.2
0.2
nm
V
V
µA
mW
mW/cm2
µs
µs
Min.
Min.
Min.
Unit
1
Infrared LED
■ Emission spectrum
100
■ Forward current vs. forward voltage
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
L2791-03
RADIANT FLUX (mW)
80
60
40
10
1
L2791, L2791-02
20
0
700
800
900
0.1
1000
1
100
10
WAVELENGTH (nm)
50˚
50˚
60˚
L2791-02
70˚
L2791
80˚
70˚
80˚
L2791-03 *
90˚
100 80
60
40
20
0
20
40
60
3.0
3.5
90˚
80 100
RELATIVE RADIANT OUTPUT (%)
* L2791-03: Except for reflection ingredient of the base.
■ Allowable forward current vs.
ambient temperature
(Typ.)
0
-1
-2
-3
-40
KLEDB0161EA
KLEDB0160EA
RELATIVE ALLOWABLE FORWARD CURRENT (%)
RELATIVE RADIANT OUTPUT (dB)
40˚
60˚
2.5
FORWARD VOLTAGE (V)
30˚
40˚
2.0
(Typ. IF=50 mA)
+1
(Typ. Ta=25 ˚C)
30˚
1.5
KLEDB0159EA
■ Radiant output vs. ambient
temperature
20˚
10
FORWARD CURRENT (mA)
■ Directivity
10˚ 0˚ 10˚
100
1
1.0
1000
KLEDB0158EA
20˚
(Typ. Ta=25 ˚C, tw=100 µs, 1 %)
1000
100
FORWARD CURRENT (mA)
RELATIVE RADIANT OUTPUT (%)
■ Radiant flux vs. forward current
(Typ. Ta=25 ˚C, IF=50 mA)
L2791 series
-20
0
20
40
60
80
100
AMBIENT TEMPERATURE (˚C)
100
80
60
40
20
0
-40
-20
0
20
40
60
80
100
AMBIENT TEMPERATURE (˚C)
KLEDB0162EA
KLEDB0027EB
■ Dimensional outlines (unit: mm)
➁ L2791-02
➂ L2791-03
0.45
LEAD
0.45
LEAD
2.54 ± 0.2
2.3 ± 0.3
4.2 ± 0.1
0.45
LEAD
13.5
13.5
4.5 ± 0.2
GLASS WINDOW
3.0 ± 0.1
5.4 ± 0.1
CLEAR EPOXY RESIN
13.5
4.65 ± 0.1
1.12 ± 0.1
5.4 ± 0.2
4.7 ± 0.1
3.6 ± 0.2
5.4 ± 0.2
6.65 ± 0.2
➀ L2791
2.54 ± 0.2
2.54 ± 0.2
COMMON TO CASE
COMMON TO CASE
COMMON TO CASE
KLEDA0060EA
KLEDA0059EA
KLEDA0058EA
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
Cat. No. KLED1021E01
Apr. 2001 DN
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