Data Sheet
SMLK34 series
PSML2
4520 1808）
（
4.5×2.0mm
（t=0.6mm）
Specifications
・
High heat radiation package from ROHM original flat frame
structure.
・
Warm white, True white.
Color
Type
WB
Specifications
Part No.
■
SMLK34WBECW
■
SMLK34WBEDW
■
SMLK34WBEAW
■
SMLK34WBEBW
Chip
Structure
Emitting
Color
Absolute Maximum Ratings (Ta＝25℃)
Electrical and Optical Characteristics (Ta＝25℃)
Forward Voltage V
F
Chromaticity Coordinates Luminous Intensity I
V
Luminous Flux
Φ
V
Power Forward Peak Forward Reverse Operating
Storage
Dissipation Current Current
Voltage Temperature Temperature
Min. Typ.
(x, y)
I
F
(mA) (mcd) (mcd) I
F
(mA) Typ. I
F
(mA)
P
D
(mW) I
F
(mA) I
FP
(mA)
V
R
(V)
Topr(℃)
Tstg(℃) Typ.(V) I
F
(mA)
(lm)
(0.30, 0.28)
360
90
300
＊
White
InGaN
on SiC
High color rendering
index (5000K)
High color rendering
index (3000K)
-
-40 to +100 -40 to +100
3.4
60
(0.34, 0.34)
(0.345, 0.351)
(0.44, 0.40)
4000 5500
60
2200 3800
60
(14)
60
(9.5)
＊Duty1/10
1kHz ( ): Reference
Dimensions
4.5
4
④
1.98
1.1
Anode Index
Recommended Solder Pattern Viewing Angle
①
2
②
1.74
SCANNING ANGLE (deg)
Directivity (deg)
30°
40°
50°
20°
10°
0°
10°
20°
30°
40°
50°
60°
70°
80°
50
0
50
90°
100
60°
70°
80°
90°
100
50
0
50
50°
40°
X−Y
X’−Y’
③
0.6
0.2
SCANNING ANGLE (deg)
Directivity (deg)
30°
20°
10°
0°
10°
20°
30°
40°
50°
60°
70°
80°
90°
100
3.65
0.9
60°
1.4
70°
2.75
①
④
80°
90°
100
RELATIVE INTENSITY (%)
RELATIVE INTENSITY (%)
RELATIVE INTENSITY (%)
RELATIVE INTENSITY (%)
②
③
Tolerance :
±0.2
（unit
: mm）
（unit
:mm）
Chromaticity Diagram
0.48
(2900K)
0.44
(4200K)
0.40
(5000K)
(3500K)
IV-Øv
25
20
Luminous Flux (lm)
15
CIE y
0.36
0.32
High Color Rendering (AW)
10
0.28
0.24
0.26
0.30
0.34
0.38
High Color Rendering (BW)
Standard (CW)
Standard (DW)
5
0
0.50
0.54
0.42
0.46
0
1
2
3
4
5
6
7
CIE x
Luminous Intensity (cd)
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
1/3
2010.05 - Rev.A
SMLK34 Series
Rank Reference of Brightness
White (WB)
Package
Intensity
size
(mcd)
(mm)
Height(mm)
Luminous
PSML2
4520
0.6
（Ta=25˚C,
I
F
＝60mA）
C
D
E
F
G
H
2200 to 2700 2700 to 3300 3300 to 4000 4000 to 4800 4800 to 5800 5800 to 7000
SMLK34WBEAW
SMLK34WBEBW
SMLK34WBECW
SMLK34WBEDW
Part No. Construction
Chromaticity rank
S M L
Series name
K 3 4 W B E
Package name
Chip Type
Emitting Color
C W 1
W
MilkyWhite
1 F
1
Cathode at sprocket hole side
Center Color Resin Color Taping Specifications Brightness Rank
∗
temperature
4
Ultra High Brightness Type
WB
White
A
B
C
D
P
High color rendering: color temperature around 5000K
High color rendering: color temperature around 2800K
Color temperature around 8000K
Color temperature around 6000K
Color temperature around 3000K
W
Wide gamut type
∗
Concerning the Brightness rank
• Please refer to the rank chart above for luminous intensity classification.
• Part name is individual for each rank.
• When shipped as sample, the part name will be a representative part name.
General products are free of ranks. Please contact sales if rank appointment is needed.
Packing Specification
ROHM LED products are being shipped with desiccant (silica gel) concluded in moisture-proof bags.
Pasting the moisture sensitive label on the outer surface of the moisture-proof bags or enclosing the humidity indication card inside the bag is available upon request.
Please contact the nearest sales office or distributer if necessary.
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
3/3
2010.05 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
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The Products are not designed or manufactured to be used with any equipment, device or
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may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
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More detail product informations and catalogs are available, please contact us.
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http://www.rohm.com/contact/
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© 2010 ROHM Co., Ltd. All rights reserved.
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