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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Features
* Low power consumption. * High efficiency. * Versatile mounting on p.c. board or panel. * I.C. compatible/low current requirement. * Popular T-13/4 diameter.
Package Dimensions
Part No. LTW-2E3C4
Lens Color Water Clear
Emitted Color 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-2E3C4 BNS-OD-C131/A4 Page : 1 of 8
LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Absolute Maximum Ratings at Ta=25
PARAMETER Power Dissipation Peak Forward Current (1/10 Duty Cycle, 0.1ms Pulse Width) DC Forward Current Reverse Voltage Electrostatic Discharge Threshold(HBM) Note A Operating Temperature Range Storage Temperature Range Lead Soldering Temperature [1.6mm(.063") From Body]
Note A : Product resistance to electrostatic discharge (ESD) according to the HBM is measured by simulating ESD using a rapid avalanche test (RAET). The RAET procedures are designed to approximate the maximum ESD ratings shown. The RAET procedure is performed on each die. The ESD classification of Class II is based on sample testing according to MIL-STD 883E. (From CREE official DS).
MAXIMUM RATING 120 100 30 5 1000 -25 -30 260 to + 80 to + 100 for 5 Seconds
UNIT mW mA mA V V
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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 Viewing Angle 2
Iv
1500
4200 15 0.30 0.30 3.5 4.0 100
mcd deg
IF = 20mA Note 1,2,3 Iv Spec. Table Note 4 IF = 20mA Note 5 Hue Spec. Table &
Chromaticity Diagram
1/2
x Chromaticity Coordinates y Forward Voltage Reverse Current VF IR
V A
IF = 20mA 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 15 tolerance. 3. Iv classification code is marked on each packing bag. 4. 1/2 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.
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Typical Electrical / Optical Characteristics Curves
(25 Ambient Temperature Unless Otherwise Noted)
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Packing Spec
500 or 250 pcs per packing bag
10 packing bags per inner carton Total 5,000 pcs per inner carton
8 Inner cartons per outer carton Total 40,000 pcs per outer carton
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
Iv Spec. Table for Reference Iv Bin ST UV WX Luminous Intensity (mcd) , If = 20mA min. 1900 3200 5500 max. 3200 5500 9300
Luminous Intensity Measurement allowance is 15% Hue Spec. Table for Reference Hue Bin 40 50 60 70 x y x y x y x y Chromaticity Coordinates 0.370 0.450 0.330 0.400 0.306 0.369 0.285 0.370 0.350 0.330 0.300 0.306 0.269 0.285 0.330 0.300 0.306 0.269 0.285 0.244 0.250 0.330 0.400 0.306 0.369 0.285 0.344 0.250 0.300
0.344 0.244 0.200 Color Coordinates Measurement allowance is 0.01
C.I.E. 1931 Chromaticity Diagram
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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 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 storage ambient for the LEDs should not exceed 30C 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 Temperature Soldering time 300C Max. 3 sec. Max. (one time only) Wave soldering Pre-heat Pre-heat time Solder wave Soldering time 100C Max. 60 sec. Max. 260C 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 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. (A) Recommended circuit.
Circuit model A
LED
Circuit model B
LED
(B) The brightness of each LED might appear different due to the differences in the I-V characteristics of those LEDs
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LITE-ON TECHNOLOGY CORPORATION
Property of Lite-On Only
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. Part No. : LTW-2E3C4 BNS-OD-C131/A4 Page : 8 of 8

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