Amapaki manini MOSFET Yumushoferi

Mbere ya byose, ubwoko bwa MOSFET nuburyo, MOSFET ni FET (indi ni JFET), irashobora gukorwa muburyo bwongerewe cyangwa bugabanuka, P-umuyoboro cyangwa N-umuyoboro wubwoko bune, ariko ikoreshwa ryukuri rya N ryongerewe gusa -Umuyoboro MOSFETs hamwe na P-umuyoboro MOSFETs wongerewe, mubisanzwe bakunze kwita NMOSFET, cyangwa PMOSFET bivuga NMOSFET ikunze kuvugwa, cyangwa PMOSFET bivuga ubu bwoko bubiri. Kuri ubu bwoko bubiri bwa MOSFETs yazamuye, NMOSFETs ikoreshwa cyane kuberako irwanya imbaraga nke kandi ikorohereza gukora. Kubwibyo, NMOSFETs isanzwe ikoreshwa muguhindura amashanyarazi hamwe na moteri ya moteri, kandi intangiriro ikurikira nayo yibanda kuri NMOSFETs. ubushobozi bwa parasitike burahari hagati yinini eshatu zaBYINSHI, bidakenewe, ahubwo biterwa n'imbogamizi zuburyo bwo gukora. Kubaho kwa parasitike capacitance bituma bigora gato gushushanya cyangwa guhitamo umushoferi wumuzunguruko. Hariho diode ya parasitike hagati yumuyoboro nisoko. Ibi byitwa diode yumubiri kandi ni ngombwa mugutwara imizigo yindobanure nka moteri. Nukuvugako, diode yumubiri iboneka gusa muri MOSFET kugiti cye kandi mubisanzwe ntabwo iba iri imbere muri chip ya IC.

 

  

 

NonehoBYINSHIgutwara moteri ya voltage nkeya, mugihe ikoreshwa rya 5V itanga amashanyarazi, muriki gihe niba ukoresheje imiterere ya totem pole gakondo, kubera transistor iba hafi ya 0.7V yamashanyarazi, bikavamo finale nyirizina yongewe kumarembo kuri voltage ni gusa 4.3 V. Muri iki gihe, duhitamo amarembo yizina ya voltage ya 4.5V ya MOSFET kuberako hariho ingaruka zimwe. Ikibazo kimwe kibaho mugukoresha 3V cyangwa ibindi bihe bito bitanga amashanyarazi. Umuvuduko wa kabiri ukoreshwa mubice bimwe na bimwe bigenzura aho igice cya logique gikoresha voltage isanzwe ya 5V cyangwa 3.3V kandi igice cyamashanyarazi gikoresha 12V cyangwa kirenga. Umuvuduko wombi uhujwe ukoresheje ubutaka rusange. Ibi bishyiraho icyifuzo cyo gukoresha umuzenguruko utuma uruhande rwa voltage ruto rugenzura neza MOSFET kuruhande rwumubyigano mwinshi, mugihe MOSFET kuruhande rwumuvuduko mwinshi izahura nibibazo bimwe byavuzwe muri 1 na 2.

 

Muri ibyo bihe uko ari bitatu, imiterere ya totem pole ntishobora kuba yujuje ibyasohotse bisohoka, kandi benshi mubashoferi ba MOSFET batwara ibinyabiziga IC ntibisa nkibishyiramo amarembo ya voltage agabanya imiterere. Iyinjiza voltage ntabwo ari agaciro gahamye, iratandukanye nigihe cyangwa ibindi bintu. Ihindagurika ritera voltage ya drayike yahawe MOSFET numuzunguruko wa PWM idahindagurika. Kugirango MOSFET itekane neza mumashanyarazi maremare, MOSFETs nyinshi zubatswe mumashanyarazi kugirango zigabanye imbaraga za amplitude ya voltage yumuryango. Muri iki gihe, mugihe moteri ya voltage yatanzwe irenze igenzurwa na voltage, bizatera ingufu nini zihoraho icyarimwe, niba ukoresheje gusa ihame rya voltage igabanya imbaraga kugirango ugabanye voltage yumuryango, hazaba hejuru cyane iyinjiza rya voltage, iBYINSHIikora neza, mugihe iyinjizwa rya voltage ryagabanutse mugihe voltage yumuryango idahagije kugirango itume imiyoboro itarenze, bityo kongera ingufu zikoreshwa.

 

Ugereranije umuzenguruko usanzwe hano gusa kumuzunguruko wa NMOSFET kugirango ukore isesengura ryoroshye: Vl na Vh nibitanga amashanyarazi make kandi yohejuru, amashanyarazi yombi arashobora kuba amwe, ariko Vl ntigomba kurenza Vh. Q1 na Q2 bigize totem pole ihindagurika, ikoreshwa mugutahura akato, kandi mugihe kimwe kugirango tumenye neza ko umuyoboro wa shoferi Q3 na Q4 utazaba icyarimwe. R2 na R3 zitanga amashanyarazi ya PWM R2 na R3 zitanga amashanyarazi ya PWM, muguhindura iyi nyandiko, urashobora kureka imikorere yumuzunguruko mumashanyarazi ya signal ya PWM irasa neza kandi ihagaze neza. Q. kurenza 0.7V Vce R5 na R6 nizo zirwanya ibitekerezo, zikoreshwa kumarembo R5 na R6 nizirwanya ibitekerezo zikoreshwa mugupima voltage yumuryango, hanyuma ikanyuzwa muri Q5 kugirango itange ibitekerezo bibi cyane kumpamvu ya Q1 na Q2, bityo bikagabanuka irembo rya voltage kumurongo wagaciro. Agaciro gashobora guhindurwa na R5 na R6. Hanyuma, R1 itanga imipaka yumurongo wibanze kuri Q3 na Q4, naho R4 itanga imipaka yumuryango winjira kuri MOSFETs, aribwo kugabanya Urubura rwa Q3Q4. Umuvuduko wihuta urashobora guhuzwa ugereranije hejuru ya R4 nibiba ngombwa.