LITEON LTST-E681UGWT Smd led Datasheet

SMD LED
Product Data Sheet
LTST-E681UGWT
Spec No.: DS22-2012-0161
Effective Date: 09/26/2014
Revision: A
LITE-ON DCC
RELEASE
BNS-OD-FC001/A4
LITE-ON Technology Corp. / Optoelectronics
No.90,Chien 1 Road, Chung Ho, New Taipei City 23585, Taiwan, R.O.C.
Tel: 886-2-2222-6181 Fax: 886-2-2221-1948 / 886-2-2221-0660
http://www.liteon.com/opto
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Features
*
*
*
*
*
*
Meet ROHS, Green Product.
Package in 8mm tape on 7" diameter reels.
EIA STD package.
I.C. compatible
Compatible with automatic placement equipment.
Compatible with infrared reflow solder process.
Package
Dimensions
Part No.
Lens Color
Source Color
LTST-E681UGWT
Diffused Lens
InGaN Green
Notes:
1. All dimensions are in millimeters (inches).
2. Tolerance is ±0.2 mm (.008") unless otherwise noted.
Part No. : LTST-E681UGWT
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Absolute Maximum Ratings at Ta=25℃
Parameter
LTST-E681UGWT
Unit
114
mW
100
mA
DC Forward Current
30
mA
Operating Temperature Range
-40℃ to + 85℃
Storage Temperature Range
-40℃ to + 100℃
Power Dissipation
Peak Forward Current
(1/10 Duty Cycle, 1ms Pulse Width)
Suggest IR Reflow Condition :
IR-Ref low Soldering Prof ile f or lead f ree soldering (Acc. to J -STD-020B)
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Electrical / Optical Characteristics at Ta=25℃
Parameter
Symbol
Luminous Intensity
Part No.
LTST-
Min.
Typ.
1120
Max.
Unit
Test Condition
2800
mcd
IF = 30mA
Note 1
IV
E681UGWT
Viewing Angle
21/2
E681UGWT
120
deg
Note 2 (Fig.5)
Peak Emission
Wavelength
P
E681UGWT
518
nm
Measurement
@Peak (Fig.1)
Dominant Wavelength
d
E681UGWT
nm
IF = 30mA
Note 3
Spectral Line Half-Width

E681UGWT
35
Forward Voltage
VF
E681UGWT
3.3
Reverse Current
IR
E681UGWT
520
-
535
nm
3.8
V
IF = 30mA
10
μA
VR = 5V
Note 4
Notes: 1. Luminous intensity is measured with a light sensor and filter combination that approximates the
CIE eye-response curve.
2. θ1/2 is the off-axis angle at which the luminous intensity is half the axial luminous intensity.
3. The dominant wavelength, λd is derived from the CIE chromaticity diagram and represents the
single wavelength which defines the color of the device.
4. Reverse voltage (VR) condition is applied to IR test only. The device is not designed for reverse operation.
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Bin Code List
Forward Voltage
Unit: V @30mA
Bin Code
Min.
Max.
D7
2.8
3.0
D8
3.0
3.2
D9
3.2
3.4
D10
3.4
3.6
D11
3.6
3.8
Tolerance on each Forward Voltage bin is +/-0.1 volt
Luminous Intensity
Unit : mcd @30mA
Bin Code
Min.
Max.
W1
1120
1400
W2
1400
1800
X1
1800
2240
X2
2240
2800
Tolerance on each Intensity bin is +/-11%
Dominant Wavelength
Unit : nm @30mA
Bin Code
Min.
Max.
AP
520.0
525.0
AQ
525.0
530.0
AR
530.0
535.0
Tolerance for each Dominate Wavelength bin is +/- 1nm
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Typical Electrical / Optical Characteristics Curves
(25C Ambient Temperature Unless Otherwise Noted)
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BNS-OD-C131/A
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User Guide
Cleaning
Do not use unspecified chemical liquid to clean LED they could harm the package.
If cleaning is necessary, immerse the LED in ethyl alcohol or isopropyl alcohol at
normal temperature for less one minute.
Recommend Printed Circuit Board Attachment Pad
Infrared / vapor phase
Reflow Soldering
Package Dimensions of Tape
Note:
1.All dimensions are in millimeters (inches).
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Package Dimensions of Reel
Notes:
1. Empty component pockets sealed with top cover tape.
2. 7 inch reel-2000 pieces per reel.
3. Minimum packing quantity is 500 pieces for remainders.
4. In accordance with ANSI/EIA 481 specifications.
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CAUTIONS
1. Application
The LEDs described here are intended to be used for ordinary electronic equipment (such as office
equipment, communication equipment and household applications).Consult Liteon’s Sales in advance
for information on applications in which exceptional reliability is required, particularly when the failure
or malfunction of the LEDs may directly jeopardize life or health (such as in aviation, transportation,
traffic control equipment, medical and life support systems and safety devices).
2. Storage
The package is sealed:
The LEDs should be stored at 30°C or less and 70%RH or less. And the LEDs are limited to use within
one year, while the LEDs is packed in moisture-proof package with the desiccants inside.
The package is opened:
The storage ambient for the LEDs should not exceed 30°C temperature and 60% relative humidity.
It is recommended that LEDs out of their original packaging are IR-reflowed within 168hrs.
For extended storage out of their original packaging, it is recommended that the LEDs be stored in a
sealed container with appropriate desiccant, or in a desiccators with nitrogen ambient.
LEDs stored out of their original packaging for more than 168hrs should be baked at about 60 deg C for
at least 48 hours before solder assembly.
3. Cleaning
Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LED if necessary.
4. Soldering
Recommended soldering conditions:
Reflow soldering
Pre-heat
Pre-heat time
Peak temperature
Soldering time
150~200°C
Temperature
120 sec. Max.
Soldering time
260°C Max.
10 sec. Max.(Max. two times)
Soldering iron
300°C Max.
3 sec. Max.
(one time only)
Soldering notes:
Because different board designs use different number and types of devices, solder pastes, reflow ovens,
and circuit boards, no single temperature profile works for all possible combinations.
However, you can successfully mount your packages to the PCB by following the proper guidelines and
PCB-specific characterization.
LITE-ON Runs both component-level verification using in-house KYRAMX98 reflow chambers and
board-level assembly.
The results of this testing are verified through post-reflow reliability testing.
Profiles used at LITE-ON are based on JEDEC standards to ensure that all packages can be successfully
and reliably surface mounted.
Figure on page3 shows a sample temperature profile compliant to JEDEC standards.
You can use this example as a generic target to set up your reflow process.
You should adhere to the JEDEC profile limits as well as specifications and recommendations from the
solder paste manufacturer to avoid damaging the device and create a reliable solder joint.
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5. Drive Method
An LED is a current-operated device. In order to ensure intensity uniformity on multiple LEDs connected
in parallel in an application, it is recommended that a current limiting resistor be incorporated in the
drive circuit, in series with each LED as shown in Circuit A below.
Circuit model A
LED
Circuit model B
LED
(A) Recommended circuit.
(B) The brightness of each LED might appear different due to the differences in the I-V characteristics
of those LEDs.
6. ESD (Electrostatic Discharge)
Static Electricity or power surge will damage the LED.
Suggestions to prevent ESD damage:




Use of a conductive wrist band or anti-electrostatic glove when handling these LEDs.
All devices, equipment, and machinery must be properly grounded.
Work tables, storage racks, etc. should be properly grounded.
Use ion blower to neutralize the static charge which might have built up on surface of the LED’s
plastic lens as a result of friction between LEDs during storage and handling.
ESD-damaged LEDs will exhibit abnormal characteristics such as high reverse leakage current, low
forward voltage, or “ no lightup ” at low currents.
To verify for ESD damage, check for “ lightup ” and Vf of the suspect LEDs at low currents.
The Vf of “ good ” LEDs should be >[email protected] for InGaN product and >[email protected] for AlInGaP
product.
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7. Reliability Test
No.
Test item
1 Resistance to soldering heat
Test condition
Reference standard
Tsld = 260°C, 10sec.
JEITA ED-4701 300 301
3 times
Tsld=245± 5°C
2 Solderability
(Lead Free Solder, Coverage ≧ 95%
JEITA ED-4701 300 303
of the dipped surface)
85 ± 5°C ~ -30°C ± 5°C
3 Thermal Shock
30min
30min
JEITA ED-4701 300 307
100cycles
-55°C ~ 25°C ~ 100°C ~ 25°C
4 Temperature Cycle
30min
5min
30min
5min
JEITA ED-4701 100 105
100cycles
5 High Temperature Storage
100°C
1000hrs
JEITA ED-4701 200 201
6 Low Temperature Storage
-55°C
1000hrs
JEITA ED-4701 200 202
7 Temperature Humidity Storage 60°C/90%RH 300hrs
8 Room temp life test
JEITA ED-4701 100 103
25°C, IF: Max current , 1000hrs
--
8. Others
The appearance and specifications of the product may be modified for improvement without prior notice.
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9. Suggested Checking List
Training and Certification
1. Everyone working in a static-safe area is ESD-certified?
2. Training records kept and re-certification dates monitored?
Static-Safe Workstation & Work Areas
1. Static-safe workstation or work-areas have ESD signs?
2. All surfaces and objects at all static-safe workstation and within 1 ft measure less than 100V?
3. All ionizer activated, positioned towards the units?
4. Each work surface mats grounding is good?
Personnel Grounding
1. Every person (including visitors) handling ESD sensitive (ESDS) items wears wrist strap, heel
strap or conductive shoes with conductive flooring?
2. If conductive footwear used, conductive flooring also present where operator stand or walk?
3. Garments, hairs or anything closer than 1 ft to ESD items measure less than 100V*?
4. Every wrist strap or heel strap/conductive shoes checked daily and result recorded for all DLs?
5. All wrist strap or heel strap checkers calibration up to date?
Note: *50V for Blue LED.
Device Handling
1. Every ESDS items identified by EIA-471 labels on item or packaging?
2. All ESDS items completely inside properly closed static-shielding containers when not at
static-safe workstation?
3. No static charge generators (e.g. plastics) inside shielding containers with ESDS items?
4. All flexible conductive and dissipative package materials inspected before reuse or recycles?
Others
1. Audit result reported to entity ESD control coordinator?
2. Corrective action from previous audits completed?
3. Are audit records complete and on file?
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