LTW-420D7 Datasheet by Lite-On Inc.

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LITEm l I" CATHCDE
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Features
* Lead (Pb) free product RoHS compliant.
* Low power consumption.
* High efficiency.
* Versatile mounting on p.c. board or panel.
* I.C. compatible/low current requirement.
* Popular T-1 diameter.
Package Dimensions
Part No. Lens Color Emitted Color
LTW-420D7 Water Clear InGaN White
NOTES:
1. All dimensions are in millimeters (inches).
2. Tolerance is ±0.25mm(.010") unless otherwise noted.
3. Protruded resin under flange is 1.0mm(.04") max.
4. Lead spacing is measured where the leads emerge from the package.
5. Specifications are subject to change without notice.
Part No. : LTW-420D7 Page : 1 of 8
BNS-OD-C131/A4
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Absolute Maximum Ratings at Ta=25
PARAMETER MAXIMUM RATING UNIT
Power Dissipation 120 mW
Peak Forward Current
(1/10 Duty Cycle, 0.1ms Pulse Width) 100 mA
DC Forward Current 30 mA
Reverse Voltage 5 V
Operating Temperature Range -25 to + 80
Storage Temperature Range -30 to + 100
Lead Soldering Temperature
[1.6mm(.063") From Body] 260 for 5 Seconds
Part No. : LTW-420D7 Page : 2 of 8
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Electrical / Optical Characteristics at Ta=25
PARAMETER SYMBOL
MIN. TYP. MAX.
UNIT
TEST CONDITION
Luminous Intensity Iv 2500 5000 mcd
IF = 20mA
Note 1,2,3
Iv Spec. Table
Viewing Angle 2θ1/2 25 deg Note 4
x 0.30
Chromaticity Coordinates
y 0.30
IF = 20mA
Note 5
Hue Spec. Table &
Chromaticity Diagram
Forward Voltage VF 3.3 4.0 V IF = 20mA
Reverse Current IR 10 μA VR = 5V
NOTE: 1. Luminous intensity is measured with a light sensor and filter combination that approximates the CIE
eye-response curve.
2. The Iv guarantee should be added ±15tolerance.
3. Iv classification code is marked on each packing bag.
4. θ1/2 is the off-axis angle at which the luminous intensity is half the axial luminous intensity.
5. The chromaticity coordinates (x, y) is derived from the 1931 CIE chromaticity diagram.
6. Precautions in handling:
When soldering, leave 2mm of minimum clearance from the resin to the soldering point.
Dipping the resin to solder must be avoided.
Correcting the soldered position after soldering must be avoided.
In soldering, do not apply any stress to the lead frame particularly when heated.
Lead forming must be done before soldering.
It is necessary to cut the lead frame at normal temperature.
7. Caution in ESD:
Static Electricity and surge damages the LED. It is recommend to use a wrist band or
anti-electrostatic glove when handling the LED. All devices, equipment and machinery
must be properly grounded.
Part No. : LTW-420D7 Page : 3 of 8
BNS-OD-C131/A4
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Typical Electrical / Optical Characteristics Curves
(25 Ambient Temperature Unless Otherwise Noted)
Part No. : LTW-420D7 Page : 4 of 8
BNS-OD-C131/A4
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Packing Spec
1,000 pcs per packing bag
10 packing bags per inner carton
Total 10,000 pcs per inner carton
8 Inner cartons per outer carton
Total 80,000 pcs per outer carton
Part No. : LTW-420D7 Page : 5 of 8
BNS-OD-C131/A4
03 49" uz
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Iv Spec. Table for Reference
Luminous Intensity (mcd) , If = 20mA
Iv
Bin min. max.
T 2500 3200
U 3200 4200
V 4200 5500
W 5500 7200
Luminous Intensity Measurement allowance is 15%
Hue Spec. Table for Reference
Hue
Bin Chromaticity Coordinates
x 0.370 0.370 0.330 0.330
40 y 0.450 0.350 0.300 0.400
x 0.330 0.330 0.306 0.306
50 y 0.400 0.300 0.269 0.369
x 0.306 0.306 0.285 0.285
60 y 0.369 0.269 0.244 0.344
x 0.285 0.285 0.250 0.250
70 y 0.344 0.244 0.200 0.300
Color Coordinates Measurement allowance is ±0.01
C.I.E. 1931 Chromaticity Diagram
Part No. : LTW-420D7 Page : 6 of 8
BNS-OD-C131/A4
LITEm l | CAUTIONS hic 1161 be incomorated in the drive circuit. In series w h
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
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 Liteons 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 storage ambient for the LEDs should not exceed 30°C temperature or 70% relative humidity. It is
recommended that LEDs out of their original packaging are used within three months.
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 dessicator with nitrogen ambient.
3. Cleaning
Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LEDs if necessary.
4. Lead Forming & Assembly
During lead forming, the leads should be bent at a point at least 3mm from the base of LED lens. Do not use
the base of the leadframe as a fulcrum during forming. Lead forming must be done before soldering at normal
temperature. During assembly on PCB, use minimum clinch force possible to avoid excessive mechanical stress
5. Soldering
When soldering, leave a minimum of 2mm clearance from the base of the lens to the soldering point.
Dipping the lens into the solder must be avoided.
Do not apply any external stress to the lead frame during soldering while the LED is at high temperature.
Recommended soldering condition:
Soldering iron Wave soldering
Temperature
Soldering time
300°C Max.
3 sec. Max.
(one time only)
Pre-heat
Pre-heat time
Solder wave
Soldering time
100°C Max.
60 sec. Max.
260°C Max.
10 sec. Max.
Note:
Excessive soldering temperature and/or time might result in deformation of the LED lens or catastrophic
failure of the LED. IR re-flow is not suitable process for through hole type LED lamp production.
6. Drive Method
An LED is a current operated devic
e, 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 Circuit model B
LED
LED
Part No. : LTW-420D7 Page : 7 of 8
(A) Recommended circuit.
(B) The brightness of each LED might
appear different due to the differences
in the I-V characteristics of those
LEDs
LITED] l |
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
BNS-OD-C131/A4
7. ESD (Electrostatic Discharge)
Static Electricity or power surge will damage the LED.
Suggestions to prevent ESD damage.
Use 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.
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 ionize 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?
8. Others
White LED is materialized by combining blue LED and phosphors. Color of White LED is changed a little by an
operating current.
The appearance and specifications of the product may be modified for improvement, without prior notice.
LITEm l IE
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Part No. : LTW-420D7 Page : 8 of 8
BNS-OD-C131/A4

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