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 3/4 diameter. package dimensions part no. lens color emitted color LTW-2R3D7 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 th e leads emerge from the package. 5. specifications are subject to change without notice. part no. : LTW-2R3D7 page : 1 of 9 bns-od-c131/a4
lite-on technology corporation property of lite-on only absolute maximum ratings at t a =25 parameter maximum rating unit power dissipation 114 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-2R3D7 page : 2 of 9 bns-od-c131/a4
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 4200 mcd i f = 20ma note 1,2,3 iv spec. table viewing angle 2 1/2 35 deg note 4 x 0.30 chromaticity coordinates y 0.30 i f = 20ma note 5 hue spec. table & chromaticity diagram forward voltage v f 3.4 3.8 v i f = 20ma reverse current i r 50 a v r = 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 in tensity 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 clear ance 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 th e 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-2R3D7 page : 3 of 9 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-2R3D7 page : 4 of 9 bns-od-c131/a4
lite-on technology corporation property of lite-on only packing spec 480 or 240 pcs per packing bag 10 packing bags per inner carton total 4,800 pcs per inner carton 8 inner cartons per outer carton total 38,400 pcs per outer carton part no. : LTW-2R3D7 page : 5 of 9 bns-od-c131/a4
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% vf spec. table for reference forward voltage (v) , if = 20ma vf bin min. max. 3e 3.00 3.20 4e 3.20 3.40 5e 3.40 3.60 6e 3.60 3.80 forward voltage measurement allowance is 0.1 hue spec. table for reference hue bin chromaticity coordinates 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 x 0.250 0.250 0.210 0.210 80 y 0.300 0.200 0.150 0.250 color coordinates measurement allowance is 0.01 part no. : LTW-2R3D7 page : 6 of 9 bns-od-c131/a4
lite-on technology corporation property of lite-on only 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 x y 0.1 0.14 0.18 0.22 0.26 0.3 0.34 0.38 0.2 0.22 0.24 0.26 0.28 0.3 x y 80 70 60 part no. : LTW-2R3D7 page : 7 of 9 bns-od-c131/a4
lite-on technology corporation property of lite-on only cautions 1. application the leds described here are intended to be used for ordi nary electronic equipment (such as office equipment, communication equipment and household applications). c onsult liteon?s sales in advance for information on applications in which exceptional relia bility 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 wave soldering temperature soldering time 300c max. 3 sec. max. (one time only) 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. circuit model a circuit model b led led ! ! ! part no. : LTW-2R3D7 page : 8 of 9 bns-od-c131/a4 (a) recommended circuit. (b) the brightness of each led might appear different due to the differences in the i-v characteristics of those leds
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 whic h 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 sens itive (esds) items wears wrist strap, heel strap or conductive shoes with conductive flooring? 2. if conductive footwear used, conductive floor ing 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 s hoes checked daily and resu lt 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 st atic-shielding containers when not at static-safe workstation? 3. no static charge generators (e.g. plasti cs) inside shielding containers with esds items? 4. all flexible conductive and dissipative packag e 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 a nd 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-2R3D7 page : 9 of 9 bns-od-c131/a4
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