Dawb LEDs yog cov khoom siv hluav taws xob-rhiab heev. Hauv kev xyaum, qhov txwv siab tshaj ntawm tam sim no yog 20mA, tab sis tam sim no feem ntau nce vim muaj ntau yam hauv kev siv. Yog tias tsis muaj kev tiv thaiv kev tiv thaiv, qhov no nce tam sim no Lub LED yuav raug puas tsuaj tom qab ib lub sijhawm thiab amplitude.
Cov laj thawj tseem ceeb rau LED puas yog:
1. Sudden nce nyob rau hauv mov voltage.
2. Lub luv luv Circuit Court ntawm ib feem los yog luam tawm kab los yog lwm yam nyob rau hauv cov kab tsim ib feem luv luv Circuit Court ntawm LED fais fab mov txoj kev, uas tsub kom lub voltage nyob rau hauv qhov chaw no.
3. Ib qho LED puas lawm vim nws tus kheej zoo thiab yog li tsim ib qho luv luv Circuit Court, thiab nws cov thawj voltage poob yog xa mus rau lwm cov LEDs.
4. Qhov kub ntawm lub teeb yog siab dhau, uas ua rau cov yam ntxwv ntawm LED tsis zoo.
5. Dej tau nkag mus rau sab hauv ntawm lub teeb, thiab cov dej yog conductive.
6. Kev ua haujlwm tiv thaiv zoo li qub tsis tau ua tiav zoo thaum lub sijhawm sib dhos, yog li ntawd lub sab hauv ntawm LED tau raug puas los ntawm hluav taws xob zoo li qub. Txawm tias lub imposed
Qhov ib txwm muaj hluav taws xob thiab qhov tseem ceeb tam sim no kuj yooj yim heev los ua kev puas tsuaj rau LED.
Yog li, kuv yuav tsum tiv thaiv LED Circuit Court li cas? Nov yog qee qhov kev xav los qhia:
1. Fuse (tube) yog siv rau hauv kev tiv thaiv Circuit Court
Txij li thaum lub fuse yog siv ib zaug, thiab cov lus teb ceev qeeb, cov nyhuv tsis zoo, thiab nws muaj teeb meem rau kev siv, lub fuse tsis haum rau kev siv cov teeb ci tiav, vim tias LED teeb tam sim no tsuas yog siv hauv nroog. lub koob meej tej yaam num thiab teeb pom kev zoo tej yaam num. Nws yuav tsum muaj kev tiv thaiv hluav taws xob LED kom nruj heev: kev tiv thaiv tuaj yeem pib tam sim ntawd thaum lub sijhawm siv tam sim no dhau mus, kom lub zog hluav taws xob ntawm LED raug txiav, kom ob qho tib si LED thiab lub zog hluav taws xob tuaj yeem tiv thaiv, thiab cov khoom siv hluav taws xob tuaj yeem rov qab tau zoo tom qab tag nrho lub teeb zoo li qub. Tsis cuam tshuam rau LED ua haujlwm. Lub Circuit Court yuav tsum tsis txhob nyuaj heev, qhov ntim yuav tsum tsis txhob loj dhau, thiab tus nqi yuav tsum qis dua. Yog li ntawd, nws yog qhov nyuaj heev los siv txoj kev fuse.
2. Siv cov hluav taws xob hloov hluav taws xob hloov pauv diodes (TVS luv luv)
TVS diode yog cov khoom siv tiv thaiv kev ua haujlwm siab hauv daim ntawv ntawm diode. Thaum nws ob tug ncej raug cuam tshuam los ntawm kev rov qab hloov siab lub zog, nws tuaj yeem txo qhov kev tiv thaiv siab ntawm nws ob tug ncej kom tsis muaj zog ntawm qhov ceev ceev ntawm 10-12 vib nas this, nqus mus txog li ob peb kilowatts ntawm surge zog, thiab tshem tawm ob. ncej. Lub voltage clamping caij ntawm ob yog nyob rau ntawm tus nqi predetermined voltage, uas zoo tiv thaiv cov precision Cheebtsam nyob rau hauv hluav taws xob Circuit Court. TVS diodes muaj qhov zoo ntawm lub sijhawm teb ceev ceev, lub zog hloov pauv loj, tsis tshua muaj dej ntws tam sim no, zoo sib xws ntawm kev sib txawv ntawm qhov sib txawv ntawm qhov sib txawv, kev tswj tau yooj yim ntawm clamping element voltage, tsis muaj kev puas tsuaj, thiab me me.
Txawm li cas los xij, hauv kev siv tiag tiag, nws tsis yooj yim los nrhiav TVS cov khoom siv uas ua tau raws li tus nqi hluav taws xob xav tau. Qhov kev puas tsuaj rau lub teeb LED feem ntau yog tshwm sim los ntawm overheating sab hauv ntawm lub nti vim yog tam sim no ntau dhau. TVS tsuas tuaj yeem ntes overvoltage tab sis tsis overcurrent. Txhawm rau xaiv qhov tsim nyog voltage tiv thaiv taw tes yog qhov nyuaj rau kev nkag siab, cov cuab yeej zoo li no tsis tuaj yeem tsim tawm thiab nws nyuaj rau siv hauv kev xyaum.
3. Xaiv lub fuse resettable
Lub resettable fuse, tseem hu ua polymer zoo kub thermistor PTC, yog tsim los ntawm polymer thiab conductive hais. Tom qab ua haujlwm tshwj xeeb, cov khoom siv hluav taws xob tsim cov saw hlau zoo li cov txheej txheem hauv cov polymer. Thaum qhov kev khiav hauj lwm tam sim no dhau mus (los yog cov khoom siv nyob rau ntawm qhov kub thiab txias), PTC resettable fuse nyob rau hauv lub xeev tsis tshua muaj zog; Thaum muaj qhov txawv txav hauv Circuit Court (los yog qhov kub thiab txias nce), qhov siab tam sim no (los yog qhov kub thiab txias nce) Cov hluav taws xob tsim hluav taws xob ua rau cov polymer nthuav tawm sai heev, uas txiav tawm txoj kab hluav taws xob tsim los ntawm cov khoom siv hluav taws xob, thiab PTC tus kheej rov qab fuse yog nyob rau hauv lub siab tsis kam; Thaum lub overcurrent (overtemperature state) nyob rau hauv Circuit Court ploj mus, lub polymer txias thiab lub ntim rov zoo li qub, cov conductive hais rov tsim txoj kev conductive, thiab PTC resettable fuse yog nyob rau hauv thawj tsis tshua muaj zog lub xeev.
Nyob rau hauv ib txwm ua hauj lwm lub xeev, tus kheej-recovery fuse muaj cua sov me ntsis, thiab nyob rau hauv lub tsis ua hauj lwm lub xeev, nws cov cua sov tiam yog siab heev, thiab nws cov nqi kuj yog heev loj, uas txwv tsis pub dhau lub tam sim no los ntawm nws, yog li ua si ib tug tiv thaiv. luag hauj lwm. Hauv ib lub voj voog tshwj xeeb, koj tuaj yeem xaiv:
1. Shunt tiv thaiv. Feem ntau, LED teeb tau muab faib ua ntau cov ceg ntoo. Peb tuaj yeem ntxiv cov khoom PTC nyob rau hauv pem hauv ntej ntawm txhua ceg rau kev tiv thaiv. Qhov zoo ntawm txoj kev no yog qhov tseeb siab thiab kev ntseeg tau zoo ntawm kev tiv thaiv.
2. Kev tiv thaiv tag nrho. Ntxiv ib qho PTC khoom nyob rau hauv pem hauv ntej ntawm tag nrho cov hlaws teeb los tiv thaiv tag nrho lub teeb. Qhov zoo ntawm txoj kev no yog tias nws yooj yim thiab tsis siv lub ntim. Rau cov khoom siv pej xeem, cov txiaj ntsig ntawm kev tiv thaiv no hauv kev siv tiag tiag yog qhov txaus siab.