Vuba aha, mugihe abakiriya benshi baza kuri Olukey kugisha inama kuri MOSFETS, bazabaza ikibazo, nigute wahitamo MOSFET ibereye? Kubijyanye niki kibazo, Olukey azagisubiza kubantu bose.
Mbere ya byose, dukeneye kumva ihame rya MOSFET. Ibisobanuro bya MOSFET byerekanwe muburyo burambuye mu kiganiro cyabanjirije iki "Transistor ya MOS Field MOS". Niba utarasobanutse neza, urashobora kubanza kubyiga. Muri make, MOSFET ni iy'ibice bigenzurwa na semiconductor ibice bifite ibyiza byo kurwanya kwinjiza byinshi, urusaku ruke, gukoresha ingufu nke, intera nini cyane, kwishyira hamwe byoroshye, nta gusenyuka kwa kabiri, hamwe n’urwego runini rufite umutekano.
None, nigute dushobora guhitamo iburyoBYINSHI?
1. Menya niba wakoresha N-umuyoboro cyangwa P-umuyoboro MOSFET
Ubwa mbere, dukwiye kubanza kumenya niba dukoresha N-umuyoboro cyangwa P-umuyoboro MOSFET, nkuko bigaragara hano:
Nkuko bigaragara ku gishushanyo kiri hejuru, hari itandukaniro rigaragara hagati ya N-umuyoboro na P-umuyoboro MOSFETs. Kurugero, iyo MOSFET ihagaze kandi umutwaro uhujwe na voltage yishami, MOSFET ikora amashanyarazi menshi cyane. Muri iki gihe, hagomba gukoreshwa N-umuyoboro MOSFET. Ibinyuranye, iyo MOSFET ihujwe na bisi kandi umutwaro urahagaze, ikoreshwa ryuruhande rwo hasi. P-umuyoboro MOSFETs isanzwe ikoreshwa muri topologiya runaka, nayo iterwa no gutekereza kuri voltage.
2. Umuyagankuba wiyongereye hamwe nubundi buryo bwa MOSFET
(1). Menya imbaraga zinyongera zisabwa na MOSFET
Icyakabiri, tuzakomeza kumenya voltage yinyongera isabwa kuri voltage Drive, cyangwa voltage ntarengwa igikoresho gishobora kwakira. Ninini nini ya voltage yinyongera ya MOSFET. Ibi bivuze ko ibisabwa byinshi bya MOSFETVDS bigomba gutoranywa, ni ngombwa cyane cyane gupima no guhitamo bitandukanye ukurikije voltage ntarengwa MOSFET ishobora kwemera. Nibyo, muri rusange, ibikoresho byikurura ni 20V, amashanyarazi ya FPGA ni 20 ~ 30V, naho 85 ~ 220VAC ni 450 ~ 600V. MOSFET yakozwe na WINSOK ifite imbaraga zikomeye zo guhangana na voltage hamwe nuburyo bwinshi bwa porogaramu, kandi itoneshwa nabenshi mubayikoresha. Niba hari ibyo ukeneye, nyamuneka hamagara serivisi zabakiriya kumurongo.
(2) Menya ibyongeweho bisabwa na MOSFET
Iyo imiterere ya voltage yagenwe nayo yatoranijwe, birakenewe kumenya igipimo cyagenwe gisabwa na MOSFET. Icyitwa igipimo cyagenwe mubyukuri nukuri ntarengwa umutwaro MOS ushobora kwihanganira mubihe byose. Bisa na voltage ibintu, menya neza ko MOSFET wahisemo ishobora gukora umubare munini winyongera, nubwo sisitemu itanga imitwe igezweho. Ibintu bibiri bigezweho kugirango dusuzume ni uburyo bukomeza hamwe na pulse. Muburyo bukomeza bwo gutwara, MOSFET iri mumiterere ihamye, mugihe ikigezweho gikomeza kunyura mubikoresho. Indwara ya pulse yerekeza ku gipimo gito cyo kuzamuka (cyangwa impinga ya pex) inyura mu gikoresho. Iyo umuyaga ntarengwa mubidukikije umaze kugenwa, ugomba gusa guhitamo igikoresho gishobora kwihanganira icyerekezo kinini.
Nyuma yo guhitamo ibyongeweho byongeweho, gukoresha imiyoboro nabyo bigomba gutekerezwa. Mubihe nyabyo, MOSFET ntabwo ari igikoresho gifatika kuko ingufu za kinetic zikoreshwa mugihe cyo gutwara ubushyuhe, ibyo bita gutakaza imiyoboro. Iyo MOSFET iri "kuri", ikora nka résistoriste ihinduka, igenwa na RDS (ON) yigikoresho kandi ihinduka cyane hamwe no gupima. Imikoreshereze yimashini irashobora kubarwa na Iload2 × RDS (ON). Kubera ko kurwanya kugaruka guhinduka hamwe no gupima, gukoresha ingufu nabyo bizahinduka. Iyo hejuru ya voltage VGS ikoreshwa kuri MOSFET, ntoya RDS (ON) izaba nto; muburyo butandukanye, urwego RDS (ON) ruzaba hejuru. Menya ko kurwanya RDS (ON) bigabanuka gato hamwe nubu. Impinduka za buri tsinda ryibipimo byamashanyarazi kubirwanya RDS (ON) murashobora kubisanga mumeza yo guhitamo ibicuruzwa.
3. Menya ibisabwa bikonje bisabwa na sisitemu
Ibikurikira bizasuzumwa nibisabwa byo gukwirakwiza ubushyuhe busabwa na sisitemu. Muri uru rubanza, hagomba gusuzumwa ibintu bibiri bisa, aribyo bihe bibi cyane nukuri.
Kubijyanye no gukwirakwiza ubushyuhe bwinshi,Olukeyishyira imbere igisubizo kubibazo bibi cyane, kuko ingaruka runaka isaba amafaranga menshi yubwishingizi kugirango sisitemu idatsinzwe. Hariho amakuru yo gupima akeneye kwitabwaho kurupapuro rwa MOSFET; ubushyuhe bwubushyuhe bwibikoresho bingana nubunini ntarengwa bwo gupima hiyongereyeho ibicuruzwa byo kurwanya ubushyuhe no gukwirakwiza ingufu (ubushyuhe bwihuza = igipimo ntarengwa cyo gupima + [kurwanya ubushyuhe × gukwirakwiza imbaraga]). Imbaraga ntarengwa zo gukwirakwiza sisitemu zishobora gukemurwa ukurikije formula imwe, ikaba imwe na I2 × RDS (ON) kubisobanuro. Tumaze kubara igipimo ntarengwa kizanyura mu gikoresho kandi dushobora kubara RDS (ON) mubipimo bitandukanye. Byongeye kandi, ubushyuhe bwo gukwirakwiza ikibaho cyumuzunguruko na MOSFET yacyo bigomba kwitabwaho.
Isenyuka rya Avalanche risobanura ko voltage ihindagurika kuri kimwe cya kabiri cyikirenga kirenze agaciro ntarengwa kandi ikora umurima ukomeye wa magnetiki wongera imbaraga mubice. Ubwiyongere bwubunini bwa chip buzamura ubushobozi bwo kwirinda umuyaga kugwa kandi amaherezo bizamura ituze ryimashini. Kubwibyo, guhitamo paki nini birashobora gukumira neza inkangu.
4. Hitamo imikorere yo guhinduranya MOSFET
Imiterere yanyuma yo guca imanza ni uguhindura imikorere ya MOSFET. Hariho ibintu byinshi bigira ingaruka kumikorere ya MOSFET. Ibyingenzi cyane ni ibipimo bitatu bya electrode-imiyoboro, electrode-isoko na soko-isoko. Ubushobozi bwishyurwa burigihe burigihe buhinduye, bivuze ko guhinduranya igihombo bibaho muri capacitor. Kubwibyo, umuvuduko wo guhindura MOSFET uzagabanuka, bityo bigire ingaruka kumikorere yibikoresho. Kubwibyo, murwego rwo guhitamo MOSFET, birakenewe kandi guca imanza no kubara igihombo cyose cyibikoresho mugihe cyo guhinduranya. Birakenewe kubara igihombo mugihe cyo gufungura (Eon) nigihombo mugihe cyo kuzimya. (Eoff). Imbaraga zose za MOSFET zihindura zishobora kugaragazwa nuburinganire bukurikira: Psw = (Eon + Eoff) × guhinduranya inshuro. Irembo ry'irembo (Qgd) rifite ingaruka zikomeye muguhindura imikorere.
Kurangiza, kugirango uhitemo MOSFET ikwiye, urubanza rujyanye rugomba gukorwa mubice bine: voltage yinyongera hamwe numuyoboro winyongera wa N-umuyoboro MOSFET cyangwa P-umuyoboro wa MOSFET, ibisabwa byo gukwirakwiza ubushyuhe bwa sisitemu yibikoresho hamwe no guhindura imikorere ya BYINSHI.
Ibyo aribyo byose uyumunsi uburyo bwo guhitamo MOSFET ibereye. Nizere ko ishobora kugufasha.
Igihe cyo kohereza: Ukuboza-12-2023
