Information

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Berlin,20.Juli2011
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2
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LEDandlow‐voltage‐disconnectperformsreliably.
Alightingtimeof5.25hoursormorewasachievedwhenthebatterywasdischargedcontinuously
withthemainpowerLED.
6.Forevaluatingthemechanicalrobustnessadrop‐testwasperformed.Fortheseteststhelampsfall
downfromaheightof1.5
metersonconcreteinsuchaway thateachofthesixsidesoneafterthe
otherhittheground.Alllampspassed.Onlysomescratchesoccurredontheplastichousing.
7.Leakagetest:Fortestingthetightnessanunderwaterbubbletestwasperformedata depthof0.5
meters.Alllampspassed.ThisisachievedbysealingwithO‐ringsofallmovablepartsand
ultrasonicweldingofallconnectedpartsofthehousing.
8.Testandevaluationofthelampsexhibitedamaturetechnology.Themicrocontrollerbased
electroniccircuitandthecomponentsareofhighqualityand
reliability.Themostadvanced
productofthesolidstatelightingindustryisused.ThesepowerLEDsfeatureinnovativeSMD
(SurfaceMountedDevice)packaging‐technology.TheyaremountedonaluminiumIMS‐substrates
(InsulatedMetallicSubstrate).TheIMSsubstratesfacilitateelectricalinterconnectionofbothLEDs
andtheheatremovalatthesame
time.Thussufficientcoolingandlongtermstabilityofthelamps
areassured.
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Dr.RobertHahn
FraunhoferIZM
HeadofPortablePowerSupplyGroup
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