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Ubwa mbere, ihame ryibanze rya MOSFET anti-reverse circuit

MOSFET anti-reverse umuzenguruko ukoresheje ibiranga guhinduranya MOSFET, mugucunga voltage yumuryango (G) kugirango umenye uruziga kuri no kuzimya. Iyo amashanyarazi atanga polarite arukuri, voltage yumuryango ituma MOSFET imeze, imiyoboro irashobora gutemba mubisanzwe; iyo amashanyarazi atanzwe polarite ihinduwe, voltage yumuryango ntishobora gukora MOSFET, bityo igahagarika umuzenguruko.

Icya kabiri, gutahura kwihariye kwa MOSFET anti-reverse circuit

1. N-umuyoboro MOSFET anti-reversion

N-umuyoboro MOSFETs ikoreshwa mugutahura anti-revers. Mu muzunguruko, isoko (S) ya N-umuyoboro wa MOSFET ihujwe na terefone mbi yumutwaro, imiyoboro (D) ihujwe na terefone nziza yo gutanga amashanyarazi, naho irembo (G) rihuzwa itumanaho ribi ryamashanyarazi binyuze mumurwanya cyangwa kugenzurwa numuzunguruko.

Ihuza ryimbere: itumanaho ryiza ryamashanyarazi rihujwe na D, naho itumanaho ribi ryahujwe na S. Muri iki gihe, résistoriste itanga amarembo y’amashanyarazi (VGS) kuri MOSFET, kandi iyo VGS irenze urwego voltage (Vth) ya MOSFET, MOSFET ikora, hamwe nubu bitemba biva kumurongo mwiza wamashanyarazi kugeza kumitwaro binyuze muri MOSFET.

Iyo ihinduwe: itumanaho ryiza ryumuriro w'amashanyarazi rihujwe na S, naho itumanaho ribi rihuzwa na D. Muri iki gihe, MOSFET iri mu gihagararo kandi umuzenguruko urahagarara kugira ngo urinde umutwaro kwangirika kuko voltage y’irembo ntishobora gukora VGS ihagije kugirango ikore imyitwarire ya MOSFET (VGS irashobora kuba munsi ya 0 cyangwa munsi ya Vth).

2. Uruhare rwibigize ubufasha

Rististor: Yifashishijwe mugutanga isoko yumuriro wa MOSFET no kugabanya irembo ryinjira kugirango wirinde kwangirika kwinshi.

Igenzura rya voltage: ibice bidakoreshwa bikoreshwa mukurinda amarembo yinkomoko yumuryango kuba hejuru cyane no kumena MOSFET.

Diode ya Parasitike: Diode ya parasitike (diode yumubiri) ibaho imbere muri MOSFET, ariko ingaruka zayo mubisanzwe ntizirengagizwa cyangwa zirindwa nigishushanyo mbonera cyumuzingi kugirango wirinde ingaruka mbi zazo zirwanya anti-revers.

Icya gatatu, ibyiza bya MOSFET anti-reverse circuit

Igihombo gito: MOSFET on-resistance ni nto, imbaraga zo kurwanya-voltage ziragabanuka, bityo igihombo cyumuzunguruko ni gito.

Kwizerwa gukomeye: imikorere irwanya-reaction irashobora kugerwaho hifashishijwe igishushanyo cyoroshye cyumuzunguruko, kandi MOSFET ubwayo ifite urwego rwo hejuru rwo kwizerwa.

Ihinduka: moderi zitandukanye za MOSFET hamwe nubushakashatsi bwumuzunguruko birashobora gutoranywa kugirango byuzuze ibisabwa bitandukanye.

Kwirinda

Mu gishushanyo cya MOSFET anti-reverse circuit, ugomba kwemeza ko guhitamo MOSFETs kugirango byuzuze ibisabwa, harimo voltage, ikigezweho, umuvuduko wihuta nibindi bipimo.

Birakenewe gutekereza ku kamaro k'ibindi bice bigize umuzunguruko, nka capacitance ya parasitike, inductance ya parasitike, nibindi, kugirango twirinde ingaruka mbi kumikorere yumuzunguruko.

Mubikorwa bifatika, ibizamini bihagije no kugenzura nabyo birasabwa kugirango habeho umutekano no kwizerwa byumuzunguruko.

Muri make, MOSFET anti-reverse circuit ni gahunda yoroshye, yizewe kandi itakaza igihombo gito cyo gukingira amashanyarazi akoreshwa cyane mubikorwa bitandukanye bisaba gukumira ingufu za polarite.