Kev tsim qauv ntawm kev tiv thaiv Circuit rau diode hauv LED Zaub Screen

1, cov ntsiab cai yooj yim thiab cov yam ntxwv ntawm dodes
Diode yog cov cuab yeej ua haujlwm semiconductor nrog unidirectional conductivity, thiab nws cov qauv tseem ceeb yog pn hlws ris tsho. Thaum lub diode biased (piv txwv li P Terminal tau txuas nrog lub voltage zoo tshaj plaws), lub PN hlij sib kis tau tawg thiab qhov tam sim no tuaj yeem hla tau zoo; Thaum lub diode yog thim rov qab biased, pn kev sib tshuam yog nyob rau hauv ib lub xeev siab tiv taus lub xeev, thiab tam sim no yog yuav luag xoom. Cov unidirectional no yog lub hauv paus rau kev ntsuas dav ntawm dodes hauv kev ncig. Ib qho ntxiv, diodes tseem muaj qhov zoo xws li hloov nrawm dua, cov hluav taws xob tsawg, muaj kev sib xyaw ua ke siab.
2, lub ntsiab hluav taws xob kev ntxhov siab tau ntsib los ntawm LED cov duab ntxaij
Cov hluav taws xob ntxhov siab uas tau coj cov lus pom yuav ntsib thaum lub sijhawm ua haujlwm feem ntau suav nrog:
Overvoltage kev ntxhov siab: Thaum lub zog hluav taws xob voltage tshaj qhov ntsuas voltage ntawm LED hlaws dai lossis kev tsav tsheb Circuit Court, nws tuaj yeem ua rau muaj kev puas tsuaj.
Kev ntxhov siab tshaj dhau los: ntev dhau los yuav ua rau cov chips rau overheat kom sov, nrawm lawv cov laus, thiab txawm hlawv.
Rov qab hluav taws xob kev nyuaj siab: Thaum cov polarity ntawm cov fais fab thim rov qab lossis thim rov qab yog tsim nyob rau hauv Circuit Court yog tsim nyob rau hauv Circuit Court yog tsim tawm rau cov kab mob LED thiab tsav tsheb Circuit Court.
3, Daim ntawv thov ntawm diodes hauv kev tsim qauv ntawm LED Zaub Tiv Thaiv Kev Tiv Thaiv
Hauv kev teb rau kev ntxhov siab hluav taws xob tau ntsib los ntawm LED cov ntxaij vab tshaus, dodes tsuas yog siv nyob rau hauv kev tiv thaiv kev tiv thaiv kab ke rau cov ntawv thov hauv qab no:
Rov qab cov hluav taws xob tiv thaiv
Txuas cov kev tiv thaiv kev tiv thaiv rov qab rau hauv cov lus ntawm lub zog ua kom tsis txhob muaj kev puas tsuaj los ntawm kev thim rov qab polaritional lossis thim hluav taws xob tsim tawm hauv Circuit Court. Thaum thim rov qab los, DIES tiv thaiv sai sai, dhau los ntawm kev thim rov qab thiab tiv thaiv cov Circuit Court los ntawm kev puas tsuaj. Cov txheej txheem tiv thaiv no yog qhov yooj yim thiab ua tau zoo, thiab yog lub hauv paus ntawm LED Zaub Circuit Court kev tsim.
Overvoltage tiv thaiv
Nyob rau ntawm lub hwj chim tawm tswv yim xaus ntawm lub LED Zaub Screen, ib qho zenerer diode lossis betient voltage suppression (TVs) Diode yuav txuas nrog rau kev tiv thaiv kev tiv thaiv. Thaum lub zog hluav taws xob voltage tshaj cov nqi teeb tsa, lub zenerer Diode lossis TVs cov hlua khi nrawm thiab kev tsav tsheb hluav taws xob tau los ntawm kev puas tsuaj. Cov txheej txheem tiv thaiv no muaj qhov zoo ntawm cov lus teb nrawm nrawm thiab muaj kev tiv thaiv zoo.
Overcurrent tiv thaiv
Txawm hais tias diodes lawv tus kheej tsis muaj kev tiv thaiv kev tiv thaiv dhau los, lawv tuaj yeem ua ke nrog rau cov fuses resistors, thiab lwm yam kom ua tiav cov kev tiv thaiv overcurrent. Piv txwv li, hauv series Circuit Court ntawm LED hlaws dai, tam sim no lim cov khoom siv tam sim no tuaj yeem txuas nrog hauv cov qib kom txwv qhov loj tam sim no; Nyob rau tib lub sijhawm, lub fuse tau txuas rau hauv parallel ntawm lub zog tawm tswv yim xaus. Thaum lub siab tam sim no siab dhau, cov fuse yaj yaj, txiav tawm lub zog hluav taws xob thiab tiv thaiv cov Circuit Court ntawm overcuit Cock.
4, cov txheej txheem tshwj xeeb rau Diode Kev Tiv Thaiv Circuit
Noj lub zog tso tawm davhlau ya nyob twg ntawm cov qauv tso tawm ua ib qho piv txwv, tsim cov kev tiv thaiv kev tiv thaiv hluav taws xob, kev tiv thaiv overvoltage, thiab overcurrent tiv thaiv:
Rov qab cov hluav taws xob tiv thaiv
Txuas Daim Ntawv Tiv Thaiv Kev Tiv Thaiv Rov Qab D1 nyob rau hauv koob ntawm lub hwj chim tswv kawg. Xaiv ib daim diode nrog txaus rov qab voltage thiab nraim kev sib tsoo tam sim no kom ntseeg tau sai sai thaum thim rov qab cov kev xa rov qab.
Overvoltage tiv thaiv
Txuas ib Zener Diode D2 hauv thaum ua tib zoo nyob rau ntawm lub hwj chim tso tawm. Xaiv tus nqi uas tsim nyog zener voltage muaj nuj nqis raws li cov ntsuas hluav taws xob kom ntseeg tau tias lub zog voltage thaum lub zog hluav taws xob tshaj cov nqi. Nyob rau tib lub sijhawm, txhawm rau kom muaj kev ntseeg siab ntawm kev tiv thaiv R1 tuaj yeem txuas nrog cov Zener diode los ntawm kev ua haujlwm nyob rau hauv kev ua haujlwm hluav taws xob.
Overcurrent tiv thaiv
Txuas lub fuse F1 nyob rau hauv parallel ntawm lub hwj chim tswv kawg. Xaiv cov nqi zog fuse uas tsim nyog tam sim no raws li qhov kev ua haujlwm tshaj plaws ntawm lub fuse tau kom sai thiab txiav tawm lub zog hluav taws xob thaum lub sijhawm tam sim no dhau. Nyob rau tib lub sijhawm, tam sim no lim cov neeg tiv thaiv R2 txuas rau hauv cov kab kev LED los txwv qhov tam sim no thiab tiv thaiv kev ua kom dhau ntawm cov kab hlaws LED.
5, muaj kev cuam tshuam ntawm Diode kev tiv thaiv Circuit Court ntawm kev ua haujlwm ntawm LED Zaub Screen
Tus qauv tsim ntawm Diro kev tiv thaiv Circuit Court muaj qhov cuam tshuam tseem ceeb ntawm kev ua haujlwm ntawm LED Zaub Screens:
Txhim kho ruaj khov
Kev tiv thaiv tau zoo siv tau los ntawm kev puas tsuaj hluav taws xob xws li overvoltage xws li overvage, li kev txhim kho lawv cov ruaj khov thiab kev ntseeg tau.
Kev Pab Cuam Ntxiv Lub Neej
Kev tiv thaiv kev tiv thaiv tuaj yeem txo cov hluav taws xob kev ntxhov siab ntawm LED hlaws dai, ncua lawv cov txheej txheem kev laus, thiab yog li txuas txoj haujlwm lub neej ntawm LED cov lus qhia.
Txhim kho kev ruaj ntseg
Thaum lub polarity ntawm lub zog hluav taws xob yog thim rov qab los yog kev tiv thaiv kev nyab xeeb lossis tiv thaiv kev nyab xeeb cov kev nyab xeeb xws li hluav taws xob luv thiab hluav taws.
https://www.trrsemicon.com/diode/dip1622, Downloadsf11-diode.html