Precautions:
Lead Forming:
Note:ꢀ
1.ꢀ PCBꢀ withꢀ differentꢀ sizeꢀ andꢀ designꢀ (componentꢀ density)ꢀ willꢀ haveꢀ
differentꢀ heatꢀ massꢀ (heatꢀ capacity).ꢀThisꢀ mightꢀ causeꢀ aꢀ changeꢀ inꢀ
temperatureꢀ experiencedꢀ byꢀ theꢀ boardꢀ ifꢀ sameꢀ waveꢀ solderingꢀ
settingꢀisꢀused.ꢀSo,ꢀitꢀisꢀrecommendedꢀtoꢀre-calibrateꢀtheꢀsolderingꢀ
profileꢀagainꢀbeforeꢀloadingꢀaꢀnewꢀtypeꢀofꢀPCB.
2.ꢀ AvagoꢀTechnologies’ꢀhighꢀbrightnessꢀLEDꢀareꢀusingꢀhighꢀefficiencyꢀ
LEDꢀdieꢀwithꢀsingleꢀwireꢀbondꢀasꢀshownꢀbelow.ꢀCustomerꢀisꢀadvisedꢀ
toꢀtakeꢀextraꢀprecautionꢀduringꢀwaveꢀsolderingꢀtoꢀensureꢀthatꢀtheꢀ
maximumꢀwaveꢀtemperatureꢀdoesꢀnotꢀexceedꢀ250°Cꢀandꢀtheꢀsolderꢀ
contactꢀ timeꢀ doesꢀ notꢀ exceedingꢀ 3sec.ꢀ Over-stressingꢀ theꢀ LEDꢀ
duringꢀsolderingꢀprocessꢀmightꢀcauseꢀprematureꢀfailureꢀtoꢀtheꢀLEDꢀ
dueꢀtoꢀdelamination.
•ꢀ TheꢀleadsꢀofꢀanꢀLEDꢀlampꢀmayꢀbeꢀpreformedꢀorꢀcutꢀtoꢀ
lengthꢀpriorꢀtoꢀinsertionꢀandꢀsolderingꢀonꢀPCꢀboard.
•ꢀ Forꢀ betterꢀ control,ꢀ itꢀ isꢀ recommendedꢀ toꢀ useꢀ properꢀ
toolꢀtoꢀpreciselyꢀformꢀandꢀcutꢀtheꢀleadsꢀtoꢀapplicableꢀ
lengthꢀratherꢀthanꢀdoingꢀitꢀmanually.
•ꢀ Ifꢀmanualꢀleadꢀcuttingꢀisꢀnecessary,ꢀcutꢀtheꢀleadsꢀafterꢀ
theꢀsolderingꢀprocess.ꢀTheꢀsolderꢀconnectionꢀformsꢀaꢀ
mechanicalꢀgroundꢀwhichꢀpreventsꢀmechanicalꢀstressꢀ
dueꢀtoꢀleadꢀcuttingꢀfromꢀtravelingꢀintoꢀLEDꢀpackage.ꢀ
Thisꢀisꢀhighlyꢀrecommendedꢀforꢀhandꢀsolderꢀoperation,ꢀ
asꢀtheꢀexcessꢀleadꢀlengthꢀalsoꢀactsꢀasꢀsmallꢀheatꢀsink.
Avago Technologies LED configuration
Soldering and Handling:
•ꢀ Careꢀ mustꢀ beꢀ takenꢀ duringꢀ PCBꢀ assemblyꢀ andꢀ
solderingꢀ processꢀ toꢀ preventꢀ damageꢀ toꢀ theꢀ LEDꢀ
component.ꢀ
•ꢀ LEDꢀ componentꢀ mayꢀ beꢀ effectivelyꢀ handꢀ solderedꢀ
toꢀ PCB.ꢀ However,ꢀ itꢀ isꢀ onlyꢀ recommendedꢀ underꢀ
unavoidableꢀcircumstancesꢀsuchꢀasꢀrework.ꢀTheꢀclosestꢀ
manualꢀ solderingꢀ distanceꢀ ofꢀ theꢀ solderingꢀ heatꢀ
sourceꢀ (solderingꢀ iron’sꢀ tip)ꢀ toꢀ theꢀ bodyꢀ isꢀ 1.59mm.ꢀ
SolderingꢀtheꢀLEDꢀusingꢀsolderingꢀironꢀtipꢀcloserꢀthanꢀ
1.59mmꢀmightꢀdamageꢀtheꢀLED.
Anode
ꢀ
Note:ꢀElectricalꢀconnectionꢀbetweenꢀbottomꢀsurfaceꢀofꢀLEDꢀdieꢀandꢀ
theꢀleadꢀframeꢀisꢀachievedꢀthroughꢀconductiveꢀpaste.
•ꢀ Anyꢀ alignmentꢀ fixtureꢀ thatꢀ isꢀ beingꢀ appliedꢀ duringꢀ
waveꢀ solderingꢀ shouldꢀ beꢀ looselyꢀ fittedꢀ andꢀ shouldꢀ
notꢀapplyꢀweightꢀorꢀforceꢀonꢀLED.ꢀNonꢀmetalꢀmaterialꢀ
isꢀ recommendedꢀ asꢀ itꢀ willꢀ absorbꢀ lessꢀ heatꢀ duringꢀ
waveꢀsolderingꢀprocess.
1.59mm
ꢀ
Note:ꢀInꢀorderꢀtoꢀfurtherꢀassistꢀcustomerꢀinꢀdesigningꢀjigꢀaccuratelyꢀ
thatꢀ fitꢀ AvagoꢀTechnologies’ꢀ product,ꢀ 3Dꢀ modelꢀ ofꢀ theꢀ productꢀ isꢀ
availableꢀuponꢀrequest.
•ꢀ ESDꢀ precautionꢀ mustꢀ beꢀ properlyꢀ appliedꢀ onꢀ theꢀ
solderingꢀ stationꢀ andꢀ personnelꢀ toꢀ preventꢀ ESDꢀ
damageꢀtoꢀtheꢀLEDꢀcomponentꢀthatꢀisꢀESDꢀsensitive.ꢀ
DoꢀreferꢀtoꢀAvagoꢀapplicationꢀnoteꢀANꢀ1142ꢀforꢀdetails.ꢀ
Theꢀsolderingꢀironꢀusedꢀshouldꢀhaveꢀgroundedꢀtipꢀtoꢀ
ensureꢀelectrostaticꢀchargeꢀisꢀproperlyꢀgrounded.
•ꢀ Atꢀ elevatedꢀ temperature,ꢀ LEDꢀ isꢀ moreꢀ susceptibleꢀ toꢀ
mechanicalꢀstress.ꢀTherefore,ꢀPCBꢀmustꢀallowedꢀtoꢀcoolꢀ
downꢀ toꢀ roomꢀ temperatureꢀ priorꢀ toꢀ handling,ꢀ whichꢀ
includesꢀremovalꢀofꢀalignmentꢀfixtureꢀorꢀpallet.
•ꢀ Recommendedꢀsolderingꢀcondition:
•ꢀ IfꢀPCBꢀboardꢀcontainsꢀbothꢀthroughꢀholeꢀ(TH)ꢀLEDꢀandꢀ
otherꢀsurfaceꢀmountꢀcomponents,ꢀitꢀisꢀrecommendedꢀ
thatꢀ surfaceꢀ mountꢀ componentsꢀ beꢀ solderedꢀ onꢀ theꢀ
topꢀsideꢀofꢀtheꢀPCB.ꢀIfꢀsurfaceꢀmountꢀneedꢀtoꢀbeꢀonꢀtheꢀ
bottomꢀ side,ꢀ theseꢀ componentsꢀ shouldꢀ beꢀ solderedꢀ
usingꢀreflowꢀsolderingꢀpriorꢀtoꢀinsertionꢀtheꢀTHꢀLED.
Wave
Soldering
Manual Solder
Dipping
[1, 2]
Pre-heatꢀtemperature 105ꢀ°CꢀMax.
-
Preheatꢀtime
Peakꢀtemperature
Dwellꢀtime
60ꢀsecꢀMax
250ꢀ°CꢀMax.
3ꢀsecꢀMax.
-
260ꢀ°CꢀMax.
5ꢀsecꢀMax
•ꢀ RecommendedꢀPCꢀboardꢀplatedꢀthroughꢀholesꢀ(PTH)ꢀ
sizeꢀforꢀLEDꢀcomponentꢀleads.
Note:ꢀ
LED component
lead size
Plated through
hole diameter
1.ꢀ Aboveꢀ conditionsꢀ refersꢀ toꢀ measurementꢀ withꢀ thermocoupleꢀ
mountedꢀatꢀtheꢀbottomꢀofꢀPCB.
2.ꢀ Itꢀisꢀrecommendedꢀtoꢀuseꢀonlyꢀbottomꢀpreheatersꢀinꢀorderꢀtoꢀreduceꢀ
thermalꢀstressꢀexperiencedꢀbyꢀLED.
Diagonal
0.45ꢀxꢀ0.45ꢀmm
0.636ꢀmm
0.98ꢀtoꢀ1.08ꢀmm
(0.039ꢀtoꢀ0.043ꢀinch)
(0.018xꢀ0.018ꢀinch) (0.025ꢀinch)
0.50ꢀxꢀ0.50ꢀmm 0.707ꢀmm
(0.020xꢀ0.020ꢀinch) (0.028ꢀinch)
1.05ꢀtoꢀ1.15ꢀmm
(0.041ꢀtoꢀ0.045ꢀinch)
•ꢀ Waveꢀ solderingꢀ parametersꢀ mustꢀ beꢀ setꢀ andꢀ
maintainedꢀ accordingꢀ toꢀ theꢀ recommendedꢀ
temperatureꢀ andꢀ dwellꢀ time.ꢀ Customerꢀ isꢀ advisedꢀ
toꢀ performꢀ dailyꢀ checkꢀ onꢀ theꢀ solderingꢀ profileꢀ toꢀ
ensureꢀthatꢀitꢀisꢀalwaysꢀconformingꢀtoꢀrecommendedꢀ
solderingꢀconditions.
•ꢀ Over-sizingꢀ theꢀ PTHꢀ canꢀ leadꢀ toꢀ twistedꢀ LEDꢀ afterꢀ
clinching.ꢀOnꢀtheꢀotherꢀhandꢀunderꢀsizingꢀtheꢀPTHꢀcanꢀ
causeꢀdifficultyꢀinsertingꢀtheꢀTHꢀLED
ꢆ