Low 2mA drive current optimized for low-light applications
CSL1901 series
1608 size Low Current LEDs
■ Guaranteed 2mA luminous intensity halves the brightness
variation
■ 2mA dominant wavelength measurement reduces wavelength shift and
color variation
��� Five-color lineup optimized for display
・ Reduces brightness and color variations in low-emission applications
Guaranteed luminous intensity at 2mA halves the intensity fluctuation
Dominant wavelength measurement at 2mA reduces wavelength shift and color variation
・ Lineup includes energy saving high efficiency light-emitting AlGaInP-based devices
Emits light at 2mA with sufficient brightness even through a diffuser plate
CSL1901 series
(1.6mm×0.8mm, t=0.55mm)
Guarantees brightness integrity at low current lighting
Standard LED
(20ｍA Product)
Low Current Chip LED
(2ｍA Product)
Current I
F
(mA)
2 20
Brightness Iv (mcd)
Required
Range
Large luminous intensity
variation
exceeding the required range
Guaranteed
luminous intensity
at 20mA
Current I
F
(mA)
2 20
Brightness Iv (mcd)
Required
Range
Small luminous intensity
variation
matching the required
range
Guaranteed
luminous intensity
at 2mA
Standard LED
(20ｍA product)
Low Current Chip LED
(2ｍA Product)
Wavelength change due to current
(570nm product)
Color Image (Lights up at 2mA)
Wavelength
shift
Color
variation
Eliminates color issues with low current lighting
Current I
F
(mA)
2
20
Color λ
D
(nm)
Standard Product (20mA)
CSL1901MW (2ｍA)
The color changes when
current is suppressed
Target
Color
Color formation
required at low
current
Approx. 3nm
Bluish
green
Yellowish
green
Featured Products
Yes
Yes
Wavelength
shift
Color
variation
No
No
■ Lineup
■ Increases the luminous intensity of LED devices
The information contained in this document is current as of August 1st, 2022.
【O_166】Catalog No. 65OP7336E 08.2022 PDF © 2022 ROHM Co., Ltd.
Emitting
Color
Part No.
Absolute Maximum Ratings (T
a
=25°C) Electrical-Optical Characteristics (Ta=25°C)
Package
(mm)
Power
Dissipation
P
D
(mW)
Forward
Current
I
F
(mA)
Peak
Forward
Current
I
FP
(mA)
Reverse
Voltage
V
R
(V)
Operating
Temperature
Topr
(°C)
Storage
Temperature
Tstg
(°C)
Forward Voltage
V
F
Reverse Current
I
R
Dominant
Wavelength λ
D
Luminous Intensity
I
V
Typ
(V)
I
F
(mA)
Max
(μA)
V
R
(V)
Typ
(nm)
I
F
(mA)
Min
(mcd)
Max
(mcd)
I
F
(mA)
Red
CSL1901VW
44 20 100* 5 -40 to +85 -40 to +100 1.8 2 10 5
630
2
1.6 6.3
2
1.6×0.8
(t=0.55)
Red
CSL1901UW
620 2.5 10.0
Orange
CSL1901DW
605 6.3 25.0
Yellow
CSL1901YW
590 6.3 25.0
Yellow
Green
CSL1901MW
570 1.0 4.0
■ Application example requiring low current lighting
(Industrial equipment)
71
224 224
112
90
16
4x
6.3
35x
6.3
35x
6.3
18x
4
22x
AlGaInP
GaP GaAsP
AlGaInP
GaAsP
AlGaInP
GaAsP
AlGaInP
GaAsP
AlGaInP
0
50
100
150
200
250
■ Yellow Green:
570nm
■ Yellow:
590nm
■ Orange:
605nm
■ Red:
620nm
■ Red:
630nm
Ensures sufficient brightness compared to conventional elements
Brightness mcd (I
F
=20mA)
・ Energy Saving High Efficiency Light Emitting AlGaInP-Based Elements
Comparing 1608 size products
・ Temperature Regulator ・ PLC
(Programmable Logic Controller)
Ideal for energy-saving
LED lighting in the low
current range
・ The light emitting parts are not too
bright
・ Light does not leak to the
neighboring light emitting parts
Level Meter
Numeric Display
Channel Display
Switch Display
* Duty 1/10, 1kHz
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