Dawb LED yog ib qho khoom siv hluav taws xob-rhiab heev. Hauv kev ua haujlwm tiag tiag, tam sim no yog 20mA raws li qhov txwv siab, tab sis tam sim no feem ntau yuav nce ntxiv vim muaj ntau yam hauv kev siv. Yog tias tsis muaj kev tiv thaiv kev tiv thaiv, qhov nce tam sim no Lub LED yuav puas tom qab lub sijhawm thiab ntau yam.
Cov laj thawj tseem ceeb rau LED puas yog:
1. Sudden nce nyob rau hauv lub hwj chim mov voltage.
2. Lub luv luv Circuit Court ntawm ib feem los yog kab los yog lwm yam hlau nyob rau hauv Circuit Court tsim ib lub zos luv luv Circuit Court ntawm LED fais fab mov txoj kev, uas ua rau 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 qhov qub voltage poob yog xa mus rau lwm cov LEDs.
4. Qhov kub hauv lub teeb yog siab dhau, uas ua rau cov yam ntxwv ntawm LED tsis zoo.
5. Dej tau nkag mus rau hauv lub teeb, thiab cov dej yog conductive.
6. Thaum sib sau ua ke, kev ua haujlwm tiv thaiv zoo li qub tsis ua kom zoo, yog li ntawd sab hauv ntawm LED tau raug puas tsuaj los ntawm hluav taws xob zoo li qub. Txawm tias daim ntawv thov yog
Ib txwm voltage thiab tam sim no qhov tseem ceeb kuj yooj yim heev los ua kev puas tsuaj rau LED.
Tom qab ntawd, kuv yuav tsum tiv thaiv LED Circuit Court li cas? Nov yog qee cov lus qhia los qhia:
1. Fuse (tube) yog siv rau hauv kev tiv thaiv Circuit Court
Vim hais tias lub fuse yog ib zaug, qeeb teb ceev, cov nyhuv tsis zoo, siv teeb meem, yog li lub fuse tsis haum rau cov khoom siv teeb pom kev zoo, vim tias cov teeb ci LED tam sim no tsuas yog siv hauv nroog loj tshaj plaws thiab cov phiaj xwm teeb pom kev zoo. Nws yuav tsum tau lub LED tiv thaiv Circuit Court yuav tsum tau heev xav tau: kev tiv thaiv yuav tsum tau activated tam sim ntawd thaum ib txwm siv tam sim no tshaj, lub hwj chim mov txoj kev ntawm lub LED yog disconnected, thiaj li hais tias lub LED thiab lub hwj chim mov muaj peev xwm tiv thaiv, thiab lub hwj chim. cov khoom siv tuaj yeem rov qab tau txais rov qab tom qab tag nrho lub teeb zoo li qub. Tsis cuam tshuam rau LED ua haujlwm. Lub Circuit Court tsis tuaj yeem nyuaj heev, tsis loj heev, thiab tus nqi qis. Yog li ntawd, nws yog qhov nyuaj heev rau kev siv lub fuse.
2. Siv cov hluav taws xob hloov hluav taws xob hloov hluav taws xob (TVS luv luv)
Transient Voltage Suppression Diode yog cov cuab yeej tiv thaiv kev ua haujlwm siab hauv daim ntawv diode. Thaum nws ob tus ncej raug rau qhov cuam tshuam rov qab los ntawm lub zog siab, nws tuaj yeem txo qhov kev tiv thaiv siab ntawm nws ob tug ncej mus rau qhov tsis muaj zog ntawm lub sijhawm luv luv ntawm 10-12 vib nas this, thiab nqus mus txog li ob peb kilowatts ntawm surge zog. . Lub inter-voltage clamping caij yog nyob ntawm tus nqi predetermined voltage, uas zoo tiv thaiv cov precision Cheebtsam nyob rau hauv hluav taws xob Circuit Court. Transient voltage suppression diodes muaj qhov zoo ntawm lub sijhawm teb ceev ceev, lub zog hloov pauv loj, tsis tshua muaj hluav taws xob tam sim no, zoo sib xws ntawm kev sib txawv ntawm qhov hluav taws xob sib txawv, kev tswj xyuas yooj yim ntawm cov clamping element voltage, tsis muaj kev puas tsuaj, thiab me me.
Txawm li cas los xij, nws tsis yooj yim los nrhiav TVS cov khoom siv uas ua tau raws li tus nqi hluav taws xob xav tau hauv kev siv tiag tiag. Qhov kev puas tsuaj ntawm LED teeb yog feem ntau tshwm sim los ntawm overheating ntawm lub nti nyob rau hauv lub nti. TVS tsuas tuaj yeem ntes overvoltage tab sis tsis overcurrent. Nws yog ib qho nyuaj rau xaiv qhov chaw tiv thaiv hluav taws xob tsim nyog, thiab cov cuab yeej zoo li no tsis tuaj yeem tsim tawm thiab nws nyuaj rau kev siv hauv kev xyaum.
3, xaiv tus kheej rov qab fuse
Tus kheej rov qab 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 ib txoj hauv kev zoo li cov khoom siv hluav taws xob hauv polymer. Thaum lub sijhawm ua haujlwm tam sim no dhau mus (lossis cov khoom tivthaiv yog nyob rau ntawm qhov kub thiab txias), PTC resettable fuse nyob rau hauv lub xeev uas tsis muaj zog; Thaum muaj qhov txawv txav nyob rau hauv Circuit Court (los yog qhov kub thiab txias ambient nce), qhov loj tam sim no (los yog qhov kub thiab txias ambient nce) Lub generated cua sov ua rau lub polymer nthuav tawm sai heev, uas txiav tawm txoj kev conductive tsim los ntawm cov conductive hais. PTC resettable fuse yog nyob rau hauv lub xeev siab-kuj; Thaum lub overcurrent (dhau-kub lub xeev) nyob rau hauv lub Circuit Court ploj mus, lub polymer txias thiab lub ntim rov zoo li qub, cov conductive hais rov ua txoj kev conductive, thiab lub PTC resettable fuse yog nyob rau hauv thawj tsis tshua muaj zog lub xeev.
Lub tshav kub ntawm tus kheej-recoverable fuse nyob rau hauv ib txwm ua hauj lwm lub xeev yog heev me me. Nyob rau hauv lub xeev ua haujlwm txawv txav, nws cov cua sov yog siab heev thiab tus nqi kuj yog qhov loj heev, uas txwv tsis pub dhau tam sim no, yog li ua lub luag haujlwm tiv thaiv. Hauv qhov tshwj xeeb Circuit Court, koj tuaj yeem xaiv:
1. Shunt tiv thaiv. Feem ntau, LED teeb tau muab faib ua ntau ceg txuas nrog hauv series. Peb tuaj yeem ntxiv PTC tivthaiv rau pem hauv ntej ntawm txhua ceg rau kev tiv thaiv. Qhov zoo ntawm txoj kev no yog qhov tseeb siab thiab kev tiv thaiv kev ntseeg tau zoo.
2, kev tiv thaiv tag nrho. Ib lub ntsiab lus PTC ntxiv rau 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 tseem yog qhov txaus siab.