Cov cua kub ntau dhau los yog daim ntawv thov tsis raug yuav txo qis kev ua haujlwm ntawm LED teeb qhov chaw. Daim ntawv thov ntawm PPTC cov khoom nyob rau hauv LED teb ntawm Tyco Electronics Circuit Court Protection Division pab manufacturers daws qhov teeb meem ntawm siab thermal rhiab heev ntawm LED teeb qhov chaw.
PPTC cov ntsiab lus yog tsim los ntawm doping Polymer Positive Temperature Coefficients nrog conductors, thiab siv nyob rau hauv series hauv Circuit Court. Thaum muaj teeb meem tshwm sim, PPTC yuav kub thiab tsis kam nce, yog li tiv thaiv cov cuab yeej los ntawm kev puas tsuaj. Thaum qhov kev ua txhaum raug kho, PPTC rov pib dua thiab rov qab mus rau lub xeev tsis muaj zog. Vim tias PPTC cov khoom tuaj yeem rov pib dua tom qab kev teeb meem thiab kev sib txuas hluav taws xob hauv hluav taws xob, kev tiv thaiv, kev pabcuam thiab kev kho tus nqi tuaj yeem txo qis, Tao Guo, Tus kws ua haujlwm daim ntawv thov ntawm Tyco Electronics.
LED cov khoom siv tau yooj yim raug puas tsuaj los ntawm overvoltage, overcurrent thiab overheating, uas zoo heev txo LED luminescence kev ua tau zoo thiab kev pab cuam lub neej. LED kev ua tau zoo thiab kev pabcuam lub neej muaj feem cuam tshuam nrog PN kev sib tshuam ua haujlwm kub ntawm LED. Thaum qhov kub thiab txias ntawm LED nti nce 10 ℃, lub luminous flux yuav txo los ntawm 1% thiab LED lub neej yuav txo los ntawm 50%. Yog li ntawd, kev tswj tau zoo ntawm LED hlws ris kub yog qhov yuav tsum tau ua los tiv thaiv LED, ntxiv rau kev tsim kom muaj cua sov zoo, kev nyab xeeb thiab txhim khu kev tiv thaiv overheating yuav tsum raug txiav txim siab.
Ib qho ntawm cov yam ntxwv ntawm PPTC yog qhov muaj ntau ntawm thermal tiv thaiv nkhaus ntsiab lus. Guo tao tau hais tias raws li qhov tam sim no nce, tib lub teeb LED ntawm cov kev khiav hauj lwm sib txawv,
Cov ntsiab lus kub los tiv thaiv yuav txawv. Yog tias tsuas yog ib qho kev tiv thaiv, kev ua haujlwm tag nrho yuav raug puas tsuaj. Yog li ntawd, lub thermal tig-tawm tiv thaiv cov ntsiab lus ntawm tib PPTC nyob rau hauv txawv tam sim no kuj txawv. Thaum qhov kev puas tsuaj tam sim no ntawm qhov sib txawv ntawm qhov kub thiab txias muaj qhov kub thiab txias, PPTC pab ua kom muaj qhov sib npaug zoo ntawm qhov ci thiab qhov ntev ntawm LED teeb pom kev zoo.
Txawm hais tias nws yog lub teeb pom kev hauv tsheb, LED txoj kev teeb, LED backlight drives, lossis lwm yam hluav taws xob LED teeb, nws tuaj yeem tiv thaiv los ntawm kev sib txuas cov khoom siv hluav taws xob qis PPTC rau hauv Circuit Court. Piv txwv li, yog tias feem ntau ntawm cov hluav taws xob nkag mus rau LED tau hloov mus rau qhov cua sov thiab tsis siv rau lub teeb, koj tuaj yeem muab kev tiv thaiv overcurrent los ntawm kev sib txuas cov khoom siv LED hauv series nrog Polyswitch caij, thiab kev tiv thaiv overtemperature los ntawm thermally bonding nws mus rau ib tug hlau core. PCB lossis LED radiator.
Rau kev tiv thaiv hluav taws xob tawm tswv yim, kev tiv thaiv tus neeg tsav tsheb, kev tiv thaiv kev tsav tsheb tawm hluav taws xob, kev tiv thaiv hluav taws xob hluav taws xob, Tyco PPTC series cov khoom tuaj yeem muab cov kev daws teeb meem sib xws. Txawm hais tias nyob rau hauv cov teeb pom kev zoo uas siv 2 hom teeb pom kev zoo los txo tus nqi ntawm lub teeb pom kev zoo thiab txhim kho qhov yooj yim, kev sib xyaw ua ke tiv thaiv cov ntsiab lus tuaj yeem siv kom tau raws li cov qauv kev nyab xeeb.