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Amakhamera we-Ceramic

Uhlolojikelele, idatha noma okokufundisa mayelana nezisekelo ze-ceramic capacitor: ubunjiniyela bayo, idatha yobuchwepheshe, izingxenye kanye nokusetshenziswa kwe-ceramic capacitor.

Izinhlobo ze-capacitor zihlanganisa:

* Uhlolojikelele lwezinhlobo ze-Capacitor

* Ukusetshenziswa kanye nezicelo

* I-Electrolytic capacitor

* I-Ceramic capacitor

* I-Tantalum capacitor

* I-Polycarbonate capacitor

* I-Silver mica capacitor

* I-Glass dielectric capacitor

* I-Polystyrene capacitor

Ama-Ceramic capacitor angabantu bezinhlobo zakho ezisetshenziswa kakhulu ze-capacitor ezisetshenziswa emikhiqizweni kagesi namuhla. Ama-Ceramic capacitor nawo asesetshenziswe amashumi eminyaka ambalwa, okwamanje akhona kubudlelwane be-valve noma i-tube circuits kusuka kuma-1930s akho.

Namuhla ama-capacitor e-ceramic atholakala ngefomethi ehlukahlukene kakhulu kusukela kuzinto ezinomthofu kuya kobunjiniyela bokukhuphuka komhlaba, izinhlobo ze-SMT. Njengoba izinguqulo eziholayo ze-disc ceramic capacitor zifinyeleleka kabanzi, futhi njengamadivayisi we-SMT, ama-capacitor e-ceramic ayatholakala kuwo wonke amafomethi avamile. Kanjalo lawa ma-capacitor e-ceramic asetshenziswa cishe kuzo zonke izinhlobo zamagiya kagesi.

Ukusebenza kwangempela okuvela kuma-ceramic capacitor kuncike ngempela ku-dielectric esetshenzisiwe. Ngokusebenzisa ama-dielectrics esimanje, amanani amakhulu kakhulu ayatholakala, kodwa kuyadingeka ngempela ukuqinisekisa amapharamitha afaka i-coefficient yezinga lokushisa nokubekezelelana. Izigaba ezihlukene zokusebenza zivame ukulawulwa nge-dielectric esetshenziswayo, futhi ngenxa yalokho kuyadingeka ukunquma ngohlobo lwe-dielectric evela ku-ceramic capacitor.

Ama-Ceramic capacitor ayahluka ngokubaluleka kusukela kuzibalo eziphansi njengama-picofarad ambalwa ukuya kuvala kuma-microfarad angu-0.one. Ngokubheka ekukhethweni okubanzi nokufaneleka kwezinhlelo ze-RF lezi zisetshenziselwa ukuhlanganisa nokuhlukanisa izinhlelo zokusebenza ngokuqondile. Lapha ziwuhlobo olusetshenziswa kakhulu oluhlala luthengeka futhi luthembekile kanye nesici sokulahlekelwa sincane kakhulu kuyilapho lokhu kuncike ku-dielectric esetshenziswayo.

Izisekelo ze-Ceramic capacitor

Ama-Ceramic capacitors angaba ngamahhashi okusebenza omhlaba we-capacitor namuhla. Ama-Ceramic capacitor asetshenziswa ezigidini ngenxa ye-combo yezindleko nokusebenza kwawo. Kunezinhlobonhlobo ezibanzi zama-dielectrics avame ukusetshenziswa njengoba kuchazwe ngezansi, kodwa ngenxa yokuthi ukuhlonza okune-ceramic capacitor kuyasikisela, kungase kube yonke i-ceramic ngokwemvelo.

Ukuze uqiniseke ukuthi ububanzi obanele be-capacitance ngokuvamile butholakala ngaphakathi kwenqwaba ye-capacitor eyodwa, ama-ceramic capacitor, njengezinhlobo ze-capacitor anezendlalelo eziningi. Lokhu kukhulisa izinga lokukwazi ukuvumela amanani adingekayo omthamo ukuthi azuzwe ngokujwayelekile.

Ama-Ceramic capacitor atholakala manje ngezindlela ezintathu ezibaluleke kakhulu yize ezinye izitayela zitholakala:

ama-capacitor e-ceramic e-lead ngenxa yokufakwa kwembobo okuhlanganiswe ne-resin coated

I-multilayer floor Mount chip Ceramic capacitors

Ingcweti ye-microwave ene-leadless disc ceramic capacitor ehloselwe ukuhlala ngaphakathi kwe-slot ngaphakathi kwe-PCB futhi idayiswa endaweni.

Naphezu kweqiniso lokuthi kungenzeka ukuthola ezinye izinhlobo ze-ceramic capacitor, lezi yizinhlobo eziyinhloko ezingase zitholakale namuhla. Kulezi zinhlobonhlobo ze-surface mount isetshenziswa ngenani elikhulu kakhulu ngenxa yokuthi izindlela zokukhiqiza ezisetshenziswayo namuhla kumathuluzi edijithali.

I-Ceramic dielectrics

Ama-Ceramic capacitor anokukhethwa okukhulu kwama-ceramic dielectrics ahlukile ngoba isisekelo esine-capacitor. I-Ceramic dielectrics ikhiqizwa ngenani lezinhlobo ze-ceramic dielectric. Amafomula anembayo wezinto zobumba ezihlukile ezisetshenziswa kuma-ceramic capacitor ayahluka kumkhiqizi oyedwa kuya komunye kodwa izinhlanganisela ezisabalele zihlanganisa i-titanium dioxide, i-strontium titanate, ne-barium titanate.

Ngokubuka kokuhlukahluka okubanzi kwezitsha zobumba ezisetshenziswa kuma-capacitor i-EIA (I-Digital Industries Alliance) ihlukanisa izinto zobumba ngezigaba. Ngokuvamile ukwehla kweqembu noma isikole kuba ngcono kakhulu izici eziphelele, kodwa lokho ngokuvamile kuyizindleko zobukhulu. Amafomu cishe kuzo zonke izigaba achaza izinga lokushisa elisebenzayo, ukukhukhuleka kwezinga lokushisa, ukubekezelela, nokunye okuningi.

Isigaba 1: Ama-capacitor e-ceramic esikole 1 ayizinhlobo ezizinzile kakhulu ze-ceramic capacitor maqondana nezinga lokushisa. Zinesici esicishe sibe ngumugqa futhi izakhiwo zazo zizimele ngokujwayelekile ngaphakathi kwemingcele evamile.

Izinhlanganisela ezijwayelekile ezisetshenziswa njengama-dielectrics yi-magnesium titanate ye-coefficient yezinga lokushisa elinethemba, noma i-calcium titanate yama-capacitor ane-coefficient yezinga lokushisa elingalungile. Ukusebenzisa izinhlanganisela zalezo kanye nezinye izinhlanganisela kungafinyelelwa ukuthola i-dielectric evamile phakathi kokuhlanu kanye ne-150. Futhi ama-coefficients okushisa aphakathi kuka-+40 kanye -5000 ppm/C angatholakala.

Ama-capacitor ekilasi lokuqala aphinde anikeze ukusebenza kwakho konke okusebenza ngempumelelo kakhulu ngokuphathelene nesici sokulahla. Lokhu kuvame ukubalulekile ezinhlosweni eziningi. Ukunquma okujwayelekile kungaba ngu-0.15%. Kungenzeka futhi ukubamba ukunemba okuphezulu kakhulu (~one%) ama-capacitor angu-1 esikole ngokuphambene nezinguqulo ezivamile zokubekezelela ezingu-5% noma ezingu-10%. Ikhosi yokunemba ephezulu kakhulu i-1 capacitor iqokwe i-C0G noma i-NP0.

Uhlobo 2: Isikole ama-capacitor ambalwa anikeza ukusebenza kahle okungcono kakhulu maqondana nokusebenza kahle kwevolumu, kodwa kuntengo yokunciphisa ukunemba kanye nebhalansi. Ukuba umphumela walokhu ngokuvamile usetshenziselwa ukunqamula, ukuhlanganisa kanye nokudlula izinhlelo zokusebenza lapho ukunemba kungabalulekile khona. I-capacitor yekilasi lesibili evamile ingase ilungise amandla ngo-15% noma ngaphezulu ngaphezu kwebanga lokushisa elingu--50C kuya ku-+85C futhi ingase isebenzise isici sokulahla sambalwa esingu-.5%. Kungaba nokunemba okuvamile kuya kokubuthakathaka (kusuka ku-20% kwehle kuye ku-+80/-XNUMX%). I-Howeer ngemisebenzi eminingi lezi zibalo ngeke zethule inkinga.

Isigaba sokumbalwa: Thayipha ama-ceramic capacitor amathathu noma ngaphezulu akunikeza ukusebenza kahle kwevolumu ephezulu, kodwa futhi lokhu kungase kube ngezindleko zokunemba okubuthakathaka kanye nebhalansi kanye nesici esincane sokulahla. Lezi futhi ngokuvamile azikwazi ukumelana nama-voltage aphezulu. I-dielectric esetshenziswayo imvamisa i-barium titanate ene-dielectric eqhubekayo ecishe ibe ngu-1250.

Isigaba esijwayelekile i-capacitor embalwa izoshintsha amandla ayo ngo--22% kuya ku-+50% ngaphezu kwenhlobonhlobo yokushisa engu-+10C kuya ku-+55C. Kungase futhi kube nenkinga yokushabalala esondele kokuthathu noma ngaphezulu ukuya ku-5%. Izoba nokunemba okuncane kakhulu (ngokuvamile, 20%, noma -20/+80%). Njengomphumela, ama-capacitor e-ceramic amaningana ngokuvamile asetshenziswa njenge-decoupling noma kwezinye izinjongo zokunikeza amandla lapho ukunemba kwendawo ngeke kube isimo. Sengikushilo ukuthi akumele zisetshenziswe ngezinjongo nomaphi lapho ama-spikes ekhona njengoba lezi zingase zilimaze i-capacitor uma zeqa i-voltage elinganiselwe.

January 19, 2017