GuhitamoBYINSHIni ngombwa cyane, guhitamo nabi birashobora kugira ingaruka kumikoreshereze yumuzunguruko wose, kumenya neza ibice bitandukanye bya MOSFET nibipimo mubice bitandukanye byo guhinduranya bishobora gufasha injeniyeri kwirinda ibibazo byinshi, ibikurikira nibimwe mubyifuzo bya Guanhua Weiye yo guhitamo MOSFETS.
Ubwa mbere, P-umuyoboro na N-umuyoboro
Intambwe yambere nukumenya ikoreshwa rya N-umuyoboro cyangwa P-umuyoboro MOSFETs. mu mbaraga zikoreshwa, iyo MOSFET yubutaka, kandi umutwaro uhujwe na trunk voltage, theBYINSHIigizwe na voltage ntoya kuruhande. Mugihe cyo guhinduranya amashanyarazi make, N-umuyoboro MOSFETs ukoreshwa muri rusange, ibyo bikaba ari ukureba ingufu za voltage zisabwa kuzimya cyangwa kuzimya igikoresho. Iyo MOSFET ihujwe na bisi hamwe nubutaka, umutwaro muremure wo kuruhande ukoreshwa. P-umuyoboro MOSFETs isanzwe ikoreshwa, kubera gutekereza kuri voltage. Guhitamo ibice bikwiye bya porogaramu, ni ngombwa kumenya voltage isabwa kugirango utware igikoresho nuburyo byoroshye kubishyira mubikorwa. Intambwe ikurikiraho ni ukumenya igipimo gikenewe cya voltage, cyangwa voltage ntarengwa ibice bishobora gutwara. Urwego rwo hejuru rwa voltage, niko igiciro cyibikoresho kiri hejuru. Mu myitozo, igipimo cya voltage kigomba kuba kinini kuruta umutaru cyangwa bisi ya bisi. Ibi bizatanga uburinzi buhagije kugirango MOSFET itananirwa. Guhitamo MOSFET, ni ngombwa kumenya voltage ntarengwa ishobora kwihanganira kuva kumazi kugera kumasoko, ni ukuvuga VDS ntarengwa, bityo rero ni ngombwa kumenya ko voltage ntarengwa MOSFET ishobora kwihanganira itandukanye nubushyuhe. Abashushanya bakeneye gupima voltage hejuru yubushyuhe bwo gukora. Umuvuduko wateganijwe ugomba kuba ufite intera ihagije kugirango utwikire uru rwego kugirango umenye neza ko umuzenguruko udatsinzwe. Byongeye kandi, izindi mpamvu z'umutekano zigomba gufatwa nkiziterwa na voltage.
Icya kabiri, menya igipimo kiriho
Urutonde rwubu rwa MOSFET rushingiye kumiterere yumuzunguruko. Igipimo kiriho nigipimo ntarengwa umutwaro ushobora kwihanganira mubihe byose. Kimwe na voltage ya dosiye, uwashushanyije agomba kumenya neza ko MOSFET yatoranijwe ishoboye gutwara iyi miyoboro yagenwe, kabone niyo sisitemu itanga umuyonga. Ibintu bibiri bigezweho byo gusuzuma ni uburyo bukomeza hamwe na pulse spike. MOSFET iri muburyo butajegajega muburyo bukomeza bwo gutwara, iyo ikigezweho kinyura mubikoresho. Imitsi ya pulse yerekeza ku mubare munini wa surges (cyangwa imitoma yumuyaga) unyura mu gikoresho, icyo gihe, iyo umuyaga ntarengwa umaze kugenwa, ni ikibazo cyo guhitamo igikoresho gishobora kwihanganira ubu buryo ntarengwa.
Nyuma yo guhitamo ibipimo byagenwe, igihombo cya conduction nacyo kibarwa. Mu bihe byihariye,BYINSHIntabwo aribintu byiza cyane kubera igihombo cyamashanyarazi kibaho mugihe cyo kuyobora, ibyo bita igihombo. Iyo "kuri", MOSFET ikora nka résistoriste ihinduka, igenwa na RDS (ON) yigikoresho kandi igahinduka cyane hamwe nubushyuhe. Gutakaza ingufu z'igikoresho birashobora kubarwa uhereye kuri Iload2 x RDS (ON), kandi kubera ko kuri-kurwanya bitandukana n'ubushyuhe, gutakaza ingufu biratandukanye. Iyo hejuru ya voltage VGS ikoreshwa kuri MOSFET, hepfo RDS (ON); muburyo butandukanye, hejuru ya RDS (ON). Kubushakashatsi bwa sisitemu, aha niho hacururizwa ibicuruzwa bitewe na voltage ya sisitemu. Kubishushanyo mbonera byoroshye, voltage yo hasi iroroshye (kandi nibisanzwe), mugihe kubishushanyo mbonera byinganda, voltage ndende irashobora gukoreshwa. Menya ko kurwanya RDS (ON) kuzamuka gato hamwe nubu.
Ikoranabuhanga rifite ingaruka zikomeye kubiranga ibice, kandi tekinoroji imwe nimwe itera kwiyongera kwa RDS (ON) mugihe wongereye VDS ntarengwa. Kuri tekinoloji nkiyi, kwiyongera mubunini bwa wafer birasabwa niba VDS na RDS (ON) bigomba kugabanuka, bityo bikongerera ingano ya pake ijyana nayo hamwe nigiciro cyiterambere. Hariho tekinoroji zitari nke mu nganda zigerageza kugenzura iyongerekana ryubunini bwa wafer, icy'ingenzi muri byo ni umwobo hamwe n’ikoranabuhanga riringaniza. Muri tekinoroji yo mu mwobo, umwobo wimbitse winjijwe muri wafer, ubusanzwe ubikwa kuri voltage nkeya, kugirango ugabanye RDS (ON).
III. Menya ibisabwa kugirango ubushyuhe bugabanuke
Intambwe ikurikira nukubara ubushyuhe bwa sisitemu. Ibintu bibiri bitandukanye bigomba gusuzumwa, urubanza rubi nurubanza nyarwo. TPV irasaba kubara ibisubizo kubintu bibi cyane, kuko iyi mibare itanga intera nini yumutekano kandi ikemeza ko sisitemu itazatsindwa.
IV. Guhindura imikorere
Hanyuma, imikorere yo guhinduranya MOSFET. Hariho ibipimo byinshi bigira ingaruka kumikorere yo guhinduranya, ibyingenzi ni irembo / imiyoboro, irembo / isoko na drain / isoko ubushobozi. Ubu bushobozi bugira igihombo cyo guhinduranya mubice bitewe no gukenera kubishyuza igihe cyose byahinduwe. Nkigisubizo, umuvuduko wo guhinduranya MOSFET uragabanuka kandi imikorere yigikoresho iragabanuka. Kugirango ubare igihombo cyose mubikoresho mugihe cyo guhinduranya, uwashizeho ibishushanyo agomba kubara igihombo mugihe cyo gufungura (Eon) nigihombo mugihe cyo kuzimya (Eoff). Ibi birashobora kugaragazwa nuburinganire bukurikira: Psw = (Eon + Eoff) x guhinduranya inshuro. Kandi amarembo yishyurwa (Qgd) afite ingaruka zikomeye muguhindura imikorere.
Igihe cyo kohereza: Apr-22-2024
