I. Incazelo ye-MOSFET
Njengemishini eqhutshwa yi-voltage, yamanje ephezulu, Ama-MOSFET babe nenani elikhulu lezicelo kumasekethe, ikakhulukazi amasistimu kagesi. Ama-diode omzimba we-MOSFET, awaziwa nangokuthi ama-parasitic diode, awatholakali ku-lithography yamasekhethi ahlanganisiwe, kodwa atholakala kumadivayisi ahlukene e-MOSFET, ahlinzeka ngokuvikeleka okuhlanekezelwe nokuqhubeka kwamanje lapho eqhutshwa imisinga ephezulu nalapho imithwalo ye-inductive ikhona.
Ngenxa yobukhona bale diode, idivayisi ye-MOSFET ayikwazi ukubonakala ishintsha kusekethe, njengakusekhethi yokushaja lapho ukushaja kuqediwe, amandla ayakhishwa bese ibhethri lihlehla libheke ngaphandle, okuvame ukuba umphumela ongafunwa.
Isixazululo esijwayelekile siwukwengeza i-diode ngemuva ukuze kuvinjelwe ukuhlehla kwamandla kagesi, kodwa izici ze-diode zinquma isidingo sokwehla kwamandla kagesi okuya phambili okungu-0.6 ~ 1V, okuholela esizukulwaneni sokushisa esingathi sína kumaza aphezulu kuyilapho kubangela imfucuza. kwamandla kanye nokunciphisa ukusebenza kahle kwamandla. Enye indlela yokwengeza i-MOSFET ebuyela emuva, kusetshenziswa ukumelana okuphansi kwe-MOSFET ukuze kuzuzwe ukusebenza kahle kwamandla.
Kufanele kuqashelwe ukuthi ngemuva kokwenziwa, i-MOSFET ayihambisani nokuqondisa, ngakho-ke ngemuva kokuqhutshwa kwengcindezi, ilingana nocingo, oluqinile kuphela, olungenawo ukwehla kwamandla kagesi, ngokuvamile lugcwala ukumelana nama-millionhm ambalwaamamiliyoni ngesikhathi, futhi okungaqondile, okuvumela amandla e-DC kanye ne-AC ukuthi adlule.
II. Izici ze-MOSFETs
I-1, i-MOSFET iyithuluzi elilawulwa yi-voltage, asikho isigaba sokushayela esidingekayo ukushayela imisinga ephezulu;
2, High okokufaka ukumelana;
I-3, ububanzi befrikhwensi yokusebenza, isivinini esikhulu sokushintsha, ukulahlekelwa okuphansi
4, AC ukhululekile impedance high, umsindo ongaphakeme.
5,Ukusetshenziswa okuningi okuhambisanayo, khulisa ukuphuma kwamanje
Okwesibili, ukusetshenziswa kwama-MOSFET ohlelweni lokuqapha
1, ukuze kuqinisekiswe ukusetshenziswa okuphephile kwe-MOSFET, ekwakhiweni kolayini, akumele kudlule ukuchithwa kwamandla epayipi, ubuningi bevolthi yomthombo wokuvuza, ugesi womthombo wesango kanye namanani amanje kanye namanye amanani omkhawulo wepharamitha.
2, izinhlobo ezahlukene zama-MOSFET asetshenziswayo, kumelengena ngokuqinile ngokuhambisana nokufinyelela okuchemile okudingekile kusekethe, ukuze kuhambisane ne-polarity ye-MOSFET offset.
3. Uma ufaka i-MOSFET, naka indawo yokufaka ukuze ugweme ukusondela endaweni yokushisa. Ukuze uvimbele ukudlidliza kokufakwa, igobolondo kufanele liqiniswe; ukugoba imikhondo yamaphini kufanele kwenziwe ngaphezu kosayizi wempande ongu-5mm ukuze kuvinjwe iphini ukuba lingagobi futhi livuze.
4, ngenxa yokuvinjelwa kokufakwayo okuphezulu kakhulu, ama-MOSFET kufanele afinyezwe ngaphandle kwephinikhodi ngesikhathi sokuthutha nokugcinwa, futhi ahlanganiswe ngesivikelo sensimbi ukuvimbela ukuphuka okungaba khona okubangelwa ngaphandle kwesango.
5. I-voltage yesango le-junction ye-MOSFET ayikwazi ukuhlehliswa futhi ingagcinwa endaweni evulekile, kodwa ukumelana nokokufaka kwama-MOSFET angaphakathi kwesango kuphezulu kakhulu uma engasetshenziswa, ngakho-ke i-electrode ngayinye kufanele ibe ne-short-circuited. Lapho uthengisa ama-MOSFET asesangweni elingafakiwe, landela ukuhleleka kwesango lomthombo, kanye ne-solder ngokucisha amandla.
Ukuqinisekisa ukusetshenziswa okuphephile kwama-MOSFET, udinga ukuqonda ngokugcwele izici ze-MOSFET kanye nezinyathelo okufanele zithathwe ekusetshenzisweni kwenqubo, ngithemba ukuthi isifinyezo esingenhla sizokusiza.
Isikhathi sokuthumela: May-15-2024
