Characteristics Graph

Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Applicable for automotive exterior light
WICOP-B 1x2 White & Amber
SWWAY2XA
RoHS
AEC-Q101
Product Brief
Description
Features and Benefits
•
•
The Compact LED series is designed
for high current operation and high flux
output applications.
•
It incorporates state of the art SMD
design and low thermal resistant
material.
•
The Compact LED is ideal light sources
for automotive applications and mobile
flash, general lighting.
.
•
•
•
•
•
Key Applications
•
Rev1.5, Aug 25, 2015
Super high Flux output and high
Luminance
Designed for high current operation
SMT solderable
Lead Free product
Compact module design available.
1
Automotive Lighting
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Table of Contents
Index
•
Product Brief
1
•
Table of Contents
2
•
Performance Characteristics
3
•
Characteristics Graph
6
•
Color Bin Structure
14
•
Reliability Test
18
•
Mechanical Dimensions
19
•
Recommended Solder Pad
20
•
Reflow Soldering Characteristics
21
•
Emitter Tape & Reel Packaging
22
•
Product Nomenclature
24
•
Handling of Silicone Resin for LEDs
25
•
Precaution For Use
26
•
Company Information
29
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Performance Characteristics
Table 1. Electro Optical Characteristics (White), IF = 350mA, Tj = 25ºC
Value
Parameter
Symbol
Unit
Min.
Typ.
Max.
Forward Voltage [1],[2],[4]
VF
2.75
3.13
3.5
V
Luminous Flux [1],[3],[4]
ΦV
91
115
140
lm
Luminous Flux [1],[3],[4] @1A
(Reference only)
ΦV
210
260
-
lm
CIEx
0.33
CIEy
0.34
Viewing Angle
2θ1/2
120
Real Thermal resistance
Rth JS
4.5
6.5
K/W
Electrical Thermal resistance
Rth JS
3.5
5.5
K/W
Temperature coefficient of VF
-40℃ ≤ T ≤ 135 ℃
TCv
-2.5
mV/K
TCx
-0.20
10-3/K
TCy
-0.40
10-3/K
Chromaticity Coordinates
[1],[4],[5]
Temperature coefficient of
color coordinates
-40℃ ≤ T ≤ 135 ℃
deg.
Notes :
[1] Tolerance : VF :±0.05V, ΦV :±8%, CIEx, CIEy:±0.005
[2] LEDs are to be classified in forward voltage groups if requested by Customer. Minimum and maximum values
include all tolerances.
[3] LEDs are to be classified in luminous flux groups. The ratio of the group limits (ΦV,max/ΦV,min) must not
[4] Parameter has to be checked by 100% in the production process.
[5] LEDs are to be classified in colour bins if requested by Customer.
Colour bins and tolerances are program specific and will be agreed by sample evaluation between SSC and
the customer. The colour coordinates of the application have to fulfil ECE /SAE legislation, whereby the
binning range must not exceed 0.02 typically. Minimum and maximum values include all tolerances.
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Performance Characteristics
Table 2. Electro Optical Characteristics (Amber), IF = 350mA, Tj = 25ºC
Value
Parameter
Symbol
Unit
Min.
Typ.
Max.
Forward Voltage [1],[2],[4]
VF
2.75
3.13
3.5
V
Luminous Flux [1],[3],[4]
ΦV
60
75
90
lm
Luminous Flux [1],[3],[4] @1A
(Reference only)
ΦV
135
165
-
lm
CIEx
0.57
CIEy
0.42
Viewing Angle
2θ1/2
120
Real Thermal resistance
Rth JS
5.0
7.0
K/W
Electrical Thermal resistance
Rth JS
4.0
6.0
K/W
Temperature coefficient of VF
-40℃ ≤ T ≤ 135 ℃
TCv
-2.5
mV/K
TCx
-0.05
10-3/K
TCy
-0.05
10-3/K
Chromaticity Coordinates
[1],[4],[5]
Temperature coefficient of
color coordinates
-40℃ ≤ T ≤ 135 ℃
deg.
Notes :
[1] Tolerance : VF :±0.05V, ΦV :±8%, CIEx, CIEy:±0.005
[2] LEDs are to be classified in forward voltage groups if requested by Customer. Minimum and maximum values
include all tolerances.
[3] LEDs are to be classified in luminous flux groups. The ratio of the group limits (ΦV,max/ΦV,min) must not
[4] Parameter has to be checked by 100% in the production process.
[5] LEDs are to be classified in colour bins if requested by Customer.
Colour bins and tolerances are program specific and will be agreed by sample evaluation between SSC and
the customer. The colour coordinates of the application have to fulfil ECE /SAE legislation, whereby the
binning range must not exceed 0.02 typically. Minimum and maximum values include all tolerances.
Rev1.5, Aug 25, 2015
4
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Performance Characteristics
Table 3. Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Forward Current (Ta=25℃)
IF
50 ~ 1,000
mA
Operating Temperature
Topr
-40 ~ +125
℃
Storage Temperature
Tstg
-40 ~ +125
℃
Junction Temperature
Tj
135
℃
Soldering Temperature
Tsld
Reflow Soldering : 260 ℃ for 10sec.
Hand Soldering : 315 ℃ for 4sec.
ESD (HBM)
(R=1.5kΩ, C= 100pF)
Max 8
kV
Notes :
[1] LEDs are to be classified in forward voltage groups if requested by Customer. Minimum and maximum values
include all tolerances.
[2] LEDs are to be classified in luminous flux groups. The ratio of the group limits (ΦV,max/ΦV,min) must not
exceed 1,6 including measurement tolerances. Minimum and maximum values include all tolerances.
[3] LEDs are to be classified in color bins if requested by Customer.
Color bins and tolerances are program specific and will be agreed by sample evaluation between SSC and
the customer. The color coordinates of the application have to fulfill ECE /SAE legislation, whereby the
binning range must not exceed 0.02 typically. Minimum and maximum values include all tolerances.
[4] Subject to Human Body Model / JESD22-A114.
[5] Parameter has to be checked by 100% in the production process.
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 1. Relative Intensity vs. Wavelength, IF = 350mA, Tj = 25℃
1.2
Relative luminos intensity [a.u.]
White
1.0
Amber
0.8
0.6
0.4
0.2
0.0
380
430
480
530
580
630
680
730
780
IF [A]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 2. Relative Intensity vs. Angle, Tj = 25℃
Relative luminous intensity [a.u.]
1.2
White
1
Amber
0.8
0.6
0.4
0.2
0
-100
-75
-50
-25
0
25
50
75
100
Beam angle [degree]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 3. Distribution of color coordinates vs. Radiation Angle(White), Tj = 25℃
Relative color coordinates [a.u.]
0.2
0.15
0.1
0.05
0
Cx
-0.05
Cy
-0.1
-100
-50
0
50
100
Beam angle [degree]
Fig 4. Distribution of color coordinates vs. Radiation Angle(Amber), Tj = 25℃
Relative color coordinates [a.u.]
0.01
1E-17
-0.01
-0.02
Cx
Cy
-0.03
-100
-75
-50
-25
0
25
50
75
100
Beam angle [degree]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 5. Forward Current vs. Forward Voltage, Tj=25℃
1.2
Forward Current [A]
1.0
0.8
0.6
0.4
0.2
0.0
0
1
2
3
4
5
Forward Voltage [V]
Fig 6. Forward Current vs. Relative Luminous Flux, Tj=25℃
Relative luminous intensity [%]
250%
200%
150%
100%
White
Amber
50%
0%
0.00
0.20
0.40
0.60
0.80
1.00
1.20
IF [A]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 7. Forward Current vs. CIE X, Y Shift of white color, Tj=25℃
0.010
Color coordinates shift [a.u.]
0.008
Cx
Cy
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
0.0
0.2
0.4
0.6
0.8
1.0
1.2
IF [A]
Fig 8. Forward Current vs. CIE X, Y Shift of amber color, Tj=25℃
Color coordinates shift [a.u.]
0.010
0.008
Cx
0.006
Cy
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
0.0
0.2
0.4
0.6
0.8
1.0
1.2
IF [A]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 9. Junction Temperature vs. Relative Light Output of white color, IF=350mA
Relative luminous intensity [%]
140%
120%
100%
80%
60%
40%
20%
0%
-40
-20
0
20
40
60
80
100
120
140
Temperature [℃]
Fig 10. Junction Temperature vs. Relative Light Output of amber color, IF=350mA
Relative luminous intensity [%]
140%
120%
100%
80%
60%
40%
20%
0%
-40
-20
0
20
40
60
80
100
120
140
Temperature [℃]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 11. Junction Temperature vs. CIE X, Y Shift of white color, Tj=25℃
0.1
Color coordinates shift [a.u.]
0.08
0.06
0.04
0.02
0
-0.02
-0.04
Cx
-0.06
Cy
-0.08
-0.1
-40
-20
0
20
40
60
80
100
120
140
Temperature [℃]
Fig 12Junction Temperature vs. CIE X, Y Shift amber color, Tj=25℃
0.1
Color coordinates shift [a.u.]
0.08
0.06
0.04
0.02
0
-0.02
-0.04
Cx
-0.06
Cy
-0.08
-0.1
-40
-20
0
20
40
60
80
100
120
140
Temperature [℃]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Characteristics Graph
Fig 13. Ambient temperature vs. Forward Voltage.
0.8
0.35A
0.6
0.7A
Forward voltage [V]
0.4
1A
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
-60
-40
-20
0
20
40
60
80
100
120
140
160
Temperature [℃]
Fig 14. Maximum Forward Current vs. Ambient Temperature, Tj(max.) = 135℃
1.2
Forward Current [A]
1.0
0.8
0.6
Rth(j-a)=25℃/W
Rth(j-a)=35℃/W
0.4
Rth(j-a)=45℃/W
0.2
0.0
0.0
25.0
50.0
75.0
100.0
125.0
150.0
Ambient Temperature [℃]
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Color Bin Structure
Table 4. Bin Code description (White), IF=350mA
Luminous Flux (lm)
Part Number
WICOP-B
White
Rev1.5, Aug 25, 2015
Bin
Code
Min.
Max.
U1
91
100
U2
100
109
U3
109
118.5
V1
118.5
130
V2
130
140
Color
Chromaticity
Coordinate
@ IF = 0.35A
Refer to page.15
14
Forward Voltage (VF)
Bin
Code
Min.
Max.
G
2.75
3.00
H
3.00
3.25
I
3.25
3.50
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Color Bin Structure
CIE Chromaticity Diagram (White), Tj=25℃, IF=350mA
L0
L1
L2
L3
L4
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
0.3123
0.3104
0.3178
0.3203
0.3235
0.3307
0.3294
0.3414
0.3355
0.3524
0.3136
0.3012
0.3187
0.3106
0.3241
0.3204
0.3295
0.3302
0.3353
0.3404
0.3187
0.3106
0.3241
0.3204
0.3295
0.3302
0.3353
0.3404
0.3411
0.3506
0.3178
0.3203
0.3235
0.3307
0.3294
0.3414
0.3355
0.3524
0.3418
0.3634
M0
M1
M2
M3
L5
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
CIE x
CIE y
0.3110
0.3196
0.3169
0.3303
0.3228
0.3410
0.3293
0.3526
0.3418
0.3634
0.3123
0.3104
0.3178
0.3203
0.3235
0.3307
0.3295
0.3414
0.3411
0.3506
0.3178
0.3203
0.3235
0.3307
0.3295
0.3414
0.3355
0.3524
0.3469
0.3608
0.3169
0.3303
0.3228
0.3410
0.3293
0.3526
0.3359
0.3644
0.3482
0.3746
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Color Bin Structure
Table 5. Bin Code description (Amber), IF=350mA
Luminous Flux (lm)
Part Number
WICOP-B amber
Rev1.5, Aug 25, 2015
Bin
Code
Min.
Max.
S2
60
70
T1
70
80
T2
80
90
Color
Chromaticity
Coordinate
Refer to page.17
16
Forward Voltage (VF)
Bin
Code
Min.
Max.
G
2.75
3.00
H
3.00
3.25
I
3.25
3.50
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Color Bin Structure
CIE Chromaticity Diagram (Amber), Tj=25℃, IF=350mA
A
B
A
Rev1.5, Aug 25, 2015
B
CIE x
CIE y
CIE x
CIE y
0.5680
0.4315
0.5763
0.4054
0.5634
0.4269
0.5833
0.4075
0.5833
0.4075
0.5634
0.4269
0.5901
0.4094
0.5557
0.4192
17
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Reliability Test
Test Item
Standard
Test Method
Test Condition
Duration
/ Cycle
Number
Of Test
External Visual
JESD22 B-101
Visual inspection
-
77
D.P.A
AEC-Q101-004
Random Sample H3TRB,HAST,TC
-
5
Vibration
JESD22 B-103
0.06 inch displacement,
20 to 100 Hz,
50 g 100 Hz to 2kHz,
4 times
30
ESD
JESD22 A-114
Human-body mode,
R=1.5㏀, C = 100pF
3 times
Negative/
Positive
30
Physical Dimension
JESD22 B-100
Verify physical dimensions against
device mechanical drawing
3 times
30
Mechanical Shock
JESD22 B-104
1500 g's for 0.5 ms,
5 blows, 3 orientations
3 times
30
Parametric Verification
JESD22 A-108
25℃, 1000 hours @350mA
1000hrs
77
Temperature cycling
JESD22 A-104
Tc= -40°∼100°C, 30 min. dwell,
5 min transfer, 1000 cycles
1000hrs
77
Power Temperature Cycle
JESD22 A-105
Ta=-40℃~85℃, If =1A,
20 min dwell / 20 min transition
(1 hour cycle), 2 min ON / 2 min OFF
1000hrs
77
High Humidity High Temp.
Operating Life
JESD22 A-101
85℃/85% RH, @ 350mA
1000hrs
77
High Temperature
Operating Life
JESD22 A-108C
Ta= 85°C, If =1A
1000hrs
77
Low Temperature
Operating Life
JESD22 A-108C
Ta= -40°C, If = 1A
1000hrs
77
Low Temperature
Storage Life
JESD22 A-119
Ta=-40°C, non-operating
1000hrs
77
High Temperature
Storage Life
JESD22 A-103B
Ta=125°C, non-operating
1000hrs
77
Thermal Shock
JESD22 A-104
-40°C ~ 100°C,
20 min. dwell, <10 second transfer,
1000 cycles
1000hrs
77
Criteria for Judging the Damage
Criteria for Judgment
Item
Symbol
Condition
MIN
MAX
Forward Voltage
VF
IF =350mA
-
Initial × 1.2
Luminous Intensity
IV
IF =350mA
Initial × 0.8
-
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Mechanical Dimensions
Top view
White
Bottom view
Amber
Amber
(+)
Side view
(-)
White
(+)
(-)
Circuit
Anode(+)
Cathode(-)
ESD
protection
component
Notes :
1.
2.
3.
All dimensions are in millimeters.
Scale : none
Undefined tolerance is ±0.1mm
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Recommended Solder Pad
LED1
(-)
(+
)
LED2
(-)
(+
)
Cathode
LED1
(-)
(+
)
LED2
(+
(-)
)
(-)
(-)
(+)
(+
)
Anode
<Recommended solder pad>
<Recommended stencil pattern>
It recommended that metal mask is designed to be under 80% of dimension of solder pad.
Notes :
1.
2.
3.
4.
All dimensions are in millimeters.
Scale : none
This drawing without tolerances are for reference only
Undefined tolerance is ±0.1mm
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Reflow Soldering Characteristics
IPC/JEDEC J-STD-020
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
Average ramp-up rate (Tsmax to Tp)
3° C/second max.
3° C/second max.
Preheat
- Temperature Min (Tsmin)
- Temperature Max (Tsmax)
- Time (Tsmin to Tsmax) (ts)
100 °C
150 °C
60-120 seconds
150 °C
200 °C
60-180 seconds
Time maintained above:
- Temperature (TL)
- Time (tL)
183 °C
60-150 seconds
217 °C
60-150 seconds
Peak Temperature (Tp)
215℃
260℃
Time within 5°C of actual Peak
Temperature (tp)2
10-30 seconds
20-40 seconds
Ramp-down Rate
6 °C/second max.
6 °C/second max.
Time 25°C to Peak Temperature
6 minutes max.
8 minutes max.
Caution
1.
2.
3.
4.
5.
Reflow soldering is recommended not to be done more than two times. In the case of more than
24 hours passed soldering after first, LEDs will be damaged.
Repairs should not be done after the LEDs have been soldered. When repair is unavoidable,
suitable tools must be used.
Die slug is to be soldered.
When soldering, do not put stress on the LEDs during heating.
After soldering, do not warp the circuit board.
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Emitter Tape & Reel Packaging
180
11.4
+0
-3
9
±0.2
60
+0.2
-0
2
±0.3
22
13 ±0.2
Label
( Tolerance: ±0.2, Unit: mm )
(1) Quantity : max 2000pcs/Reel (Can be blank, less than 20)
(2) Cumulative Tolerance : Cumulative Tolerance/10 pitches to be ±0.2mm
(3) Adhesion Strength of Cover Tape : Adhesion strength to be 0.1-0.7N when the
cover tape is turned off from the carrier tape at the angle of 10º to the carrier tape
(4) Package : P/N, Manufacturing data Code No. and quantity to be indicated on a
damp proof Package
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Emitter Tape & Reel Packaging
* Please refer to the next page for the 'Labeling Information' and 'Product Nomenclature'.
Rev1.5, Aug 25, 2015
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Product Nomenclature
Table 6. Part Numbering System : X1X2X3X4X5X6X7X8
Part Number Code
Description
Part Number
Value
X1
Company
S
SSC
X2
Package Type
W
WICOP
X3X4
Color
WA
WHITE/AMBER
X5
Chip Type
O
-
X6X7
Chip Number
2X
2CHIP
X8
Product Revision
A
-
Table 7. Lot Numbering System :Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10–Y11Y12Y13Y14Y15Y16Y17
Lot Number Code
Description
Y1Y2
Year
Y3
Month
Y4Y5
Day
Y6
Top View LED series
Y7Y8Y9Y10
Mass order
Y11Y12Y13Y14Y15Y16Y17
Internal Number
Rev1.5, Aug 25, 2015
Lot Number
24
Value
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Handling of Silicone Resin for LEDs
1.
During processing, mechanical stress on the surface should be minimized as much as possible.
Sharp objects of all types should not be used to pierce the sealing compound.
2.
In general, LEDs should only be handled from the side. By the way, this also applies to
LEDs without a silicone sealant, since the surface can also become scratched.
3.
When populating boards in SMT production, there are basically no restrictions regarding the form
of the pick and place nozzle, except that mechanical pressure on the surface of the resin must be
prevented. This is assured by choosing a pick and place nozzle which is larger than the LED’s
reflector area.
4.
Silicone differs from materials conventionally used for the manufacturing of LEDs. These
conditions must be considered during the handling of such devices. Compared to standard
encapsulants, silicone is generally softer, and the surface is more likely to attract dust. As
mentioned previously, the increased sensitivity to dust requires special care during processing. In
cases where a minimal level of dirt and dust particles cannot be guaranteed, a suitable cleaning
solution must be applied to the surface after the soldering of components.
5.
Seoul Semiconductor suggests using isopropyl alcohol for cleaning. In case other solvents are
used, it must be assured that these solvents do not dissolve the package or resin. Ultrasonic
cleaning is not recommended. Ultrasonic cleaning may cause damage to the LED.
6.
Please do not mold this product into another resin (epoxy, urethane, etc) and do not handle this
product with acid or sulfur material in sealed space.
7. Avoid leaving fingerprints on silicone resin parts.
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Precaution for Use
(1) Storage
To avoid the moisture penetration, we recommend store in a dry box with a desiccant.
The recommended storage temperature range is 5℃ to 30℃ and a maximum humidity of
RH50%.
(2) Use Precaution after Opening the Packaging
Use proper SMT techniques when the LED is to be soldered dipped as separation of the lens may
affect the light output efficiency.
Pay attention to the following:
a. Recommend conditions after opening the package
- Sealing
- Temperature : 5 ~ 40℃ Humidity : less than RH30%
b. If the package has been opened more than 1 year (MSL_2) or the color of the desiccant
changes, components should be dried for 10-12hr at 60±5℃
(3) Do not apply mechanical force or excess vibration during the cooling process to normal
temperature after soldering.
(4) Do not rapidly cool device after soldering.
(5) Components should not be mounted on warped (non coplanar) portion of PCB.
(6) Radioactive exposure is not considered for the products listed here in.
(7) Gallium arsenide is used in some of the products listed in this publication.
These products are dangerous if they are burned or shredded in the process of disposal.
It is also dangerous to drink the liquid or inhale the gas generated by such products when
chemically disposed of.
(8) This device should not be used in any type of fluid such as water, oil, organic solvent and etc.
When washing is required, IPA (Isopropyl Alcohol) should be used.
(9) When the LEDs are in operation the maximum current should be decided after measuring
the package temperature.
(10) LEDs must be stored properly to maintain the device. If the LEDs are stored for 3 months or
more after being shipped from SSC, a sealed container with a nitrogen atmosphere should
be used for storage.
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Precaution for Use
(11) The appearance and specifications of the product may be modified for improvement without
notice.
(12) Long time exposure of sunlight or occasional UV exposure will cause lens discoloration.
(13) VOCs (Volatile organic compounds) emitted from materials used in the construction of fixtures
can penetrate silicone encapsulants of LEDs and discolor when exposed to heat and photonic
energy. The result can be a significant loss of light output from the fixture. Knowledge of the
properties of the materials selected to be used in the construction of fixtures can help prevent
these issues.
(14) The slug is electrically isolated.
(15) Attaching LEDs, do not use adhesives that outgas organic vapor.
(16) The driving circuit must be designed to allow forward voltage only when it is ON or OFF.
If the reverse voltage is applied to LED, migration can be generated resulting in LED damage.
(17) Similar to most Solid state devices;
LEDs are sensitive to Electro-Static Discharge (ESD) and Electrical Over Stress (EOS).
Below is a list of suggestions that Seoul Semiconductor purposes to minimize these effects.
a. ESD (Electro Static Discharge)
Electrostatic discharge (ESD) is the defined as the release of static electricity when two objects come
into contact. While most ESD events are considered harmless, it can be an expensive problem in
many industrial environments during production and storage. The damage from ESD to an LEDs may
cause the product to demonstrate unusual characteristics such as:
- Increase in reverse leakage current lowered turn-on voltage
- Abnormal emissions from the LED at low current
The following recommendations are suggested to help minimize the potential for an ESD event.
One or more recommended work area suggestions:
- Ionizing fan setup
- ESD table/shelf mat made of conductive materials
- ESD safe storage containers
One or more personnel suggestion options:
- Antistatic wrist-strap
- Antistatic material shoes
- Antistatic clothes
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Precaution for Use
Environmental controls:
- Humidity control (ESD gets worse in a dry environment)
b. EOS (Electrical Over Stress)
Electrical Over-Stress (EOS) is defined as damage that may occur when an electronic device is subje
cted to a current or voltage that is beyond the maximum specification limits of the device.
The effects from an EOS event can be noticed through product performance like:
- Changes to the performance of the LED package
(If the damage is around the bond pad area and since the package is completely encapsulated
the package may turn on but flicker show severe performance degradation.)
- Changes to the light output of the luminaire from component failure
- Components on the board not operating at determined drive power
Failure of performance from entire fixture due to changes in circuit voltage and current across total circ
uit causing trickle down failures. It is impossible to predict the failure mode of every LED exposed to e
lectrical overstress as the failure modes have been investigated to vary, but there are some common s
igns that will indicate an EOS event has occurred:
- Damaged may be noticed to the bond wires (appearing similar to a blown fuse)
- Damage to the bond pads located on the emission surface of the LED package
(shadowing can be noticed around the bond pads while viewing through a microscope)
- Anomalies noticed in the encapsulation and phosphor around the bond wires
- This damage usually appears due to the thermal stress produced during the EOS event
c. To help minimize the damage from an EOS event Seoul Semiconductor recommends utilizing:
- A surge protection circuit
- An appropriately rated over voltage protection device
- A current limiting device
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Product Data Sheet
SWWAY2XA – WICOP-B 1x2 White & Amber
Company Information
Published by
Seoul Semiconductor © 2013 All Rights Reserved.
Company Information
Seoul Semiconductor (SeoulSemicon.com) manufacturers and packages a wide selection of light
emitting diodes (LEDs) for the automotive, general illumination/lighting, appliance, signage and back
lighting markets. The company is the world’s fifth largest LED supplier, holding more than 10,000
patents globally, while offering a wide range of LED technology and production capacity in areas such
as “nPola”, deep UV LEDs, "Acrich", the world’s first commercially produced AC LED, and "Acrich
MJT - Multi-Junction Technology" a proprietary family of high-voltage LEDs. The company’s broad
product portfolio includes a wide array of package and device choices such as Acrich, high-brightness
LEDs, mid-power LEDs, side-view LEDs, through-hole type LED lamps, custom displays,
and sensors. The company is vertically integrated from epitaxial growth and chip manufacture in it’s
fully owned subsidiary, Seoul Viosys, through packaged LEDs and LED modules in three Seoul
Semiconductor manufacturing facilities. Seoul Viosys also manufactures a wide range of unique
deep-UV wavelength devices.
Legal Disclaimer
Information in this document is provided in connection with Seoul Semiconductor products. With
respect to any examples or hints given herein, any typical values stated herein and/or any information
regarding the application of the device, Seoul Semiconductor hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual
property rights of any third party. The appearance and specifications of the product can be changed
to improve the quality and/or performance without notice. The values on the datasheet could change
without notice.
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