Vim li cas LED diodes hlawv tawm?

1, Lub hauv paus ntsiab lus ua haujlwm ntawm LED diodes
LED diode yog ib qho khoom siv semiconductor uas tuaj yeem hloov hluav taws xob hluav taws xob mus rau lub teeb lub zog. Nws txoj hauv kev ua haujlwm yog ua raws li cov qauv band thiab cov khoom siv hluav taws xob hloov pauv ntawm PN kev sib tshuam (xws li kev sib tshuam ntawm P-type semiconductor thiab N-type semiconductor). Thaum ib qho hluav taws xob rau pem hauv ntej yog siv rau ob qho kawg ntawm LED, qhov nyob hauv thaj av P thiab cov hluav taws xob hauv cheeb tsam N recombine ntawm PN kev sib tshuam, tso tawm lub zog uas tawm mus rau hauv daim ntawv ntawm photons, ua rau luminescence.
2, Kev txheeb xyuas qhov ua rau ntawm LED diode burnout
Kev hlawv tawm ntawm LED diodes feem ntau yog tshwm sim los ntawm ntau yam ua haujlwm ua ke. Cov hauv qab no yog cov ncauj lus kom ntxaws txog cov laj thawj tseem ceeb:
Overcurrent
Overcurrent yog ib qho ntawm feem ntau ua rau LED diode burnout. Thaum qhov tam sim no dhau los ntawm LED tshaj nws cov nqi ntsuas, nws tuaj yeem ua rau PN kev sib tshuam hauv LED kom dhau los, ua rau thermal tawg lossis hlawv. Overcurrent tej zaum yuav tshwm sim los ntawm kev siv hluav taws xob siab, kev tsim hluav taws xob tsis raug, lossis kev tsav tsheb tsis ua haujlwm.
Kub kub
LEDs ua kom sov thaum ua haujlwm. Yog hais tias lub tshav kub dissipation yog tsis zoo, lub tsub zuj zuj ntawm cov cua sov yuav ua rau kom qhov kub thiab txias ntawm lub LED nce, accelerating nws aging txheej txheem thiab txawm ncaj qha ua rau burnout. Cov cua kub tsis zoo tuaj yeem tshwm sim los ntawm cov yam ntxwv xws li thermal conductivity tsis zoo ntawm cov khoom ntim, tsim tsis tsim nyog rau cov cua sov dissipation, lossis kub ambient kub.
Voltage tsis sib haum
Qhov ntsuas hluav taws xob ntawm LED yog qhov tseem ceeb rau nws txoj haujlwm ib txwm muaj. Yog tias lub zog hluav taws xob tsis sib xws ntawm qhov ntsuas hluav taws xob ntawm LED, tshwj xeeb tshaj yog thaum lub zog hluav taws xob siab dhau lawm, nws tuaj yeem ua rau muaj kev ntxhov siab ntau dhau ntawm PN hlws ris hauv LED, ua rau tawg lossis hlawv.
Electrostatic paug (ESD)
Electrostatic tawm yog hais txog qhov tshwm sim tam sim no tshwm sim los ntawm kev sib sau ntawm cov nqi ntawm cov khoom. Thaum lub sij hawm tsim khoom, kev thauj mus los, thiab kev siv cov LEDs, yog tias tsim nyog los tiv thaiv kev tiv thaiv tsis zoo, cov hluav taws xob hluav taws xob tuaj yeem nkag mus ncaj qha rau PN kev sib tshuam hauv LED, ua rau muaj kev puas tsuaj.
Humidity thiab corrosion
Hauv qhov chaw ntub dej, cov khoom ntim khoom thiab cov pins ntawm LEDs tuaj yeem corrode, ua rau luv luv Circuit Court lossis qhib Circuit Court. Tsis tas li ntawd, cov av noo kuj tuaj yeem cuam tshuam qhov kev ua haujlwm ntawm cov cua sov ntawm LEDs thiab ua kom lawv cov txheej txheem kev laus.
Mechanical stress
Thaum lub sij hawm installation thiab siv, yog hais tias lub LED raug kev nyuaj siab heev, xws li khoov, compression, los yog cuam tshuam, nws yuav ua rau puas rau nws cov qauv, yog li cuam tshuam rau nws ib txwm ua hauj lwm thiab txawm burning tawm.
teeb meem zoo
Kev tsim khoom zoo ntawm LED ncaj qha cuam tshuam nws lub neej kev pabcuam thiab kev ntseeg siab. Yog tias muaj teeb meem hauv kev tsim cov LEDs, xws li siv lead ua tsis xws luag, ntim tsis zoo, lossis xaiv cov khoom siv tsis raug, nws yuav ua rau lawv hlawv thaum siv.
3, Kev tiv thaiv kev tiv thaiv
Txhawm rau tiv thaiv LED diodes los ntawm kev kub hnyiab, cov kev tiv thaiv hauv qab no tuaj yeem ua tau:
Tsim nyog Circuit Court tsim: Xyuas kom meej tias lub hwj huam mov voltage sib phim qhov ntsuas hluav taws xob ntawm LED, thiab teeb tsa qhov tsim nyog tam sim no txwv cov khoom xws li resistors lossis qhov chaw tam sim no los tiv thaiv overcurrent.
Txhim kho cov cua sov dissipation tsim: Txais cov khoom ntim thiab cov khoom cua kub dissipation nrog cov thermal conductivity zoo los xyuas kom meej tias LED tuaj yeem cuam tshuam cov cua sov raws sijhawm thaum lub sijhawm ua haujlwm.
Siv cov kev ntsuas los tiv thaiv zoo li qub: Thaum lub sijhawm tsim khoom, kev thauj mus los, thiab siv, ua kom tsim nyog los tiv thaiv zoo li qub, xws li hnav cov hnab looj tes tiv thaiv zoo li qub, siv cov ntim tshuaj tiv thaiv zoo li qub, thiab lwm yam.
Tswj cov av noo thiab xeb: Hauv qhov chaw ntub dej, kev ntsuas yuav tsum tau ua kom txo cov av noo, xws li siv cov dehumidifiers lossis desiccants, thiab tsis tu ncua xyuas seb cov khoom ntim LED thiab cov pins puas corroded.
Tsis txhob muaj kev ntxhov siab ntawm cov neeg kho tshuab: Thaum lub sijhawm teeb tsa thiab siv, kev ntxhov siab ntau dhau ntawm lub tshuab yuav tsum raug zam ntawm LED ntau li ntau tau los xyuas kom meej tias nws cov qauv sab hauv tsis puas.
Xaiv cov khoom zoo: Thaum yuav LEDs, xaiv cov npe nrov thiab cov tuam txhab tsim khoom kom ntseeg tau cov khoom lag luam zoo.
https://www.trrsemicon.com/diode/1-0a-fast-recov-ery-rectifier-1f2.html