Chip TL431 ishidi: incazelo, isiqu, Ukucaciswa

Nokho-Chip TL431 ishidi wadala 70s sekwephuzile, futhi namuhla abantu abaningi esetshenziswa emisebenzini radio amateur kanye nezimboni. Lokhu chip kuyinto ebalulekile eziqondisa isimame esiye kabanzi segezi ahlukahlukene.

umsebenzi incazelo

TL431 ishidi has izikhonkwane ezintathu kuphela, kodwa kufihlwe transistors eziyishumi (comparator) kwezezindlu yayo. Imisebenzi kudivayisi futhi isimame ezivamile efanayo. Nokho, ngenxa yezinkinga ezifana, i-chip has a ukuzinza ephakeme ezishisayo, futhi ngcono ubunzima izici. Isici esiyinhloko thuluzi yikhono ukusebenzisa ehlukanisayo ukushintsha zangaphandle voltage kuqiniswa ngaphakathi 2.5-30 V Abanye onobuhle umkhawulo ephansi kungase kube 1.25 V. Le wesifunda comparator ukuthi okuhlanganiswe ngayo ishidi umkhiqizo TL431, siqukethe le izingxenye ezilandelayo:

• amandla ehlangene (asishintshi neze) inkomba voltage 2.5 V, okuyinto ixhunywe okokufaka ephambene we comparator;
• ezingeni okufakwayo ngqo;
• the Transistor comparator okukhipha, emitter futhi ngalendoda of elihlanganiswa oxhumana amandla;
• a diode ukuze bazivikele polarity izinto zizoshintsha.

I Transistor has a umthwalo esiphezulu 100 ma futhi zinamandla esiphezulu - 36 V. Ukuze ukulayisha comparator esakhelwe (ngokulandelana okwalesi okukhiphayo Transistor chip) kudinga ekufakweni yayo ukufaka voltage ephakeme kunaleyo isithenjwa. Ekwi-chip okokufaka voltage ehlukanisayo ehlanganisa resistors ezimbili, ihlukanisa ngesigamu inani voltage. Lokhu kusho ukuthi comparator ngeke lapho bengena wesifunda okokufaka 5, ekhishwa ehlukanisayo ukuthola 2.5 V Uma Resistor ukwandisa ekumelaneni kubalulekile futhi ukwandisa futhi supply voltage. It kuvela ukuthi lesi sifunda ingasebenza njengendlela diode zener ngaphakathi 2,5-36 V

Inhloso Ububanzi

Akukho olulodwa amandla kukhompyutha Iyunithi enikeza, lapho kwakungekho ishidi chips TL431. Futhi, kungatholakala cishe yonke ephansi amandla pulsed amandla kagesi, isibonelo, ukushaja omakhalekhukhwini. Lezi chips ingasetshenziswa hhayi kuphela inhloso yazo (zener diode ngoba ugesi amayunithi), kodwa futhi ukwakha on ngesisekelo kwabo izibani ehlukahlukene alamu ezwakalayo. Ngalezi amadivayisi ukuqapha sebuningini nemingcele ezahlukene (kodwa namanje voltage eyisisekelo). Kukhona amacebo amaningi based TL431 ishidi, lapho kungenzeka bahlanganise kudivayisi wokulawula izinga uketshezi kule isitsha, umswakama lokushisa, igesi ingcindezi noma illuminance uketshezi. ongakhetha leseluhleni - hhayi kuphela kungenzeka, ukusetshenziswa kwalesi chip empeleni kahle, konke kuncike ngokuzimisela umklami.

Isikhathi esining impela, Wabasaqalayo umsakazo nayizimfundamakhwela abanesifiso yini esikhundleni selithi TL431. Analogue Yiqiniso, zikhona. Ngakho, ungasebenzisa imikhiqizo amazwe futhi ezifuywayo KA431 KR142EN19A kudivayisi K1156ER5h.

Kufinyeta

Integrated circuit "Texas INSTRUMENTS" izinkampani zinokwethenjelwa kakhulu, it has a ububanzi yokusebenza ibanga, kulula ukuyisebenzisa, futhi okubaluleke kakhulu, has an ngentengo eqolo. Ngenxa izici zayo, uveza engaphezu kwamashumi amane futhi namanje ethandwa.