L2791_06 Datasheet, PDF (1/3 Pages) Hamamatsu Corporation – Infrared LED Small emission spot LED using current confined chip

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
l Small emission spot
L2791 : φ400 µm
L2791-03: φ160 µm
l Uniform emission: L2791/-02
l Narrow directivity: L2791/-02
Applications
l Automatic control systems
l Optical switches
l Auto-focus
s Absolute maximum ratings (Ta=25 °C)
Parameter
Symbol
Condition
Value
Unit
Forward current
IF
80
mA
Reverse voltage
VR
3
V
Pulse forward current
IFP
Pulse width=10 µs
Duty ratio=1 %
0.5
A
O p era ting te m pe ratu re Topr
-30 to +85
°C
Storage temperature Tstg
-40 to +100 *
°C
* L2791-03 is guaranteed to resist temperature cycle test of up to 5 cycles.
s Electrical and optical characteristics (Ta=25 °C)
Parameter
Symbol
Condition
L2791
Min. Typ. Max.
Peak emission
wavelength
λp IF=50 mA
850 880 910
Spectral half width
∆λ IF=50 mA
- 60 -
Forward voltage
VF IF=50 mA
- 1.5 1.7
Pulse forward voltage VFP IF=0.5 A
- 3.2 4.0
Reverse current
IR VR=3 V
-
- 10
Radiant flux
φe IF=50 mA
1.6 2.0 -
Radiant illuminance PE IF=50 mA
- 1.3 -
Rise time
tr IF=50 mA, 10 to 90 % - 0.12 0.2
Fall time
tf IF=50 mA, 90 to 10 % - 0.12 0.2
L2791-02
Min. Typ. Max.
850 880 910
- 60 -
- 1.5 1.7
- 3.2 4.0
-
- 10
1.6 2.0 -
- 2.0 -
- 0.12 0.2
- 0.12 0.2
L2791-03
Min. Typ. Max.
Unit
850 880 910 nm
- 60 -
nm
- 1.5 1.7
V
- 3.2 4.0
V
-
- 10
µA
4.0 5.0 -
mW
-
-
- mW/cm²
- 0.12 0.2
µs
- 0.12 0.2
µs
1