Sharp IV-C35M Manual do Utilizador descarregar pdf (Página 15)

C35 Application Note



RoHS Compliant www.semileds.com

C35 Application Note V1.3

Subject to change without notice





Page

Tj=Ta+Rja×PdorTj=Tb+Rjb×Pd

Equation2



WhenusingC35inluminaires,it’sbettertocontroltheTbtemperaturebelow70°C.ThiswillkeeptheTjof

C35below125°C.Forexample,theRjbofC35inthedatasheetis8°C/W.

TjiscalculatedasbelowifTcis70°C@500mA,Vf=3.4V

Tj=Tb+Rjbx

Pd=70+8x(0.5x3.4)=83.6°C.

WhenheatgathersinsidetheLED,itcausesdegradationofluminousefficacyandlifetime,andresultsin

degradationofexpectedperformance.It’sessentialtohaveagoodthermaldesigntoreleasetheheatto

theambient.



1 2 ... 10 11 12 13 14 15 16 17 18

Sem comentários

Sharp IV-C35M Manual do Utilizador Página 15