Waba uzi umuzunguruko wa MOSFET？

Umuzunguruko wa MOSFET ni igice cyingenzi cyibikoresho bya elegitoroniki nubushakashatsi bwumuzunguruko, bishinzwe gutanga ubushobozi buhagije bwo gutwara kugirango MOSFET ikore neza kandi yizewe. Ibikurikira nisesengura rirambuye ryumushoferi wa MOSFET:

I. Uruhare rwumuzunguruko

Tanga ubushobozi buhagije bwo gutwara:Kubera ko ibimenyetso byo gutwara akenshi bitangwa bivuye kumugenzuzi (urugero DSP, microcontroller), voltage ya drayike hamwe nubu ntibishobora kuba bihagije kugirango uhindure MOSFET mu buryo butaziguye, bityo rero umuzenguruko wa drake urasabwa guhuza ubushobozi bwo gutwara.

Menya neza uburyo bwiza bwo guhinduranya:Umuzunguruko wumushoferi ukeneye kwemeza ko MOSFETs itihuta cyane cyangwa itinda cyane mugihe cyo guhinduranya kugirango wirinde ibibazo bya EMI nigihombo kinini cyo guhinduranya.

Menya neza niba igikoresho cyizewe:Bitewe nuko hari ibipimo bya parasitike yibikoresho byo guhinduranya, imiyoboro ya voltage-amashanyarazi irashobora kubyara mugihe cyo gutwara cyangwa kuzimya, kandi umushoferi wumushoferi agomba guhagarika iyo mitwe kugirango arinde uruziga nigikoresho.

II. Ubwoko bwimodoka

Umushoferi utari wenyine

Drive Direct:Inzira yoroshye yo gutwara MOSFET nuguhuza ibimenyetso byo gutwara ibinyabiziga kumarembo ya MOSFET. Ubu buryo burakwiriye mubihe aho ubushobozi bwo gutwara buhagije kandi ibisabwa byo kwigunga ntabwo biri hejuru.

Inzira ya Bootstrap:Ukoresheje ihame ryuko imbaraga za capacitori zidashobora guhinduka muburyo butunguranye, voltage ihita ikurwaho mugihe MOSFET ihinduye uko ihinduranya, bityo gutwara moteri ya MOSFET yumuriro mwinshi.Ubu buryo bukunze gukoreshwa mugihe aho MOSFET idashobora gusangira igitekerezo kimwe na umushoferi IC, nkumuzunguruko wa BUCK.

Umushoferi wenyine

Optocoupler kwigunga:Gutandukanya ibimenyetso bya disiki biva kumurongo nyamukuru bigerwaho binyuze muri optocouplers. Optocoupler ifite ibyiza byo kwigunga amashanyarazi nubushobozi bukomeye bwo kurwanya-kwivanga, ariko igisubizo cyinshyi gishobora kuba gito, kandi ubuzima nubwizerwe birashobora kugabanuka mubihe bibi.

Guhindura akato:Gukoresha transformateur kugirango ugere ku bwigunge bwa signal ya disiki kuva kumurongo nyamukuru. Transformer kwigunga ifite ibyiza byo gusubiza hejuru-inshuro nyinshi, voltage yo kwigunga cyane, nibindi, ariko igishushanyo kiragoye kandi cyoroshye kubintu bya parasitike.

Icya gatatu, igishushanyo mbonera cyimodoka

Umuvuduko wa Drive:Hagomba kwemezwa ko voltage yumuriro irenze hejuru yumubyigano wa MOSFET kugirango umenye neza ko MOSFET ishobora gukora neza. Mugihe kimwe, voltage ya drayike ntigomba kuba ndende cyane kugirango wirinde kwangiza MOSFET.

Gutwara ibinyabiziga:Nubwo MOSFETs ari ibikoresho bitwarwa na voltage kandi ntibisaba imiyoboro ihoraho ikomeza, amashanyarazi agomba gukenerwa kugirango hamenyekane umuvuduko runaka wo guhinduranya. Kubwibyo, umushoferi wumushoferi agomba kuba ashobora gutanga impinga ihagije.

Drive Resistor:Disiki irwanya ikoreshwa mugucunga umuvuduko wo guhinduranya no guhagarika imitwe iriho. Guhitamo agaciro ka résistoriste bigomba gushingira kumuzingo wihariye nibiranga MOSFET. Muri rusange, agaciro ka résistoriste ntigomba kuba nini cyane cyangwa nto cyane kugirango wirinde kugira ingaruka kumikorere no kumuzunguruko.

Imiterere ya PCB:Mugihe imiterere ya PCB, uburebure bwihuza hagati yumuzunguruko wumushoferi n irembo rya MOSFET bigomba kugabanywa bishoboka, kandi ubugari bwihuza bugomba kongerwa kugirango bigabanye ingaruka ziterwa na parasitike no kurwanya ingaruka ziterwa no gutwara. Mugihe kimwe, ibice byingenzi nkibishobora gutwara ibinyabiziga bigomba gushyirwa hafi y irembo rya MOSFET.

IV. Ingero za porogaramu

Imiyoboro ya MOSFET ikoreshwa cyane mubikoresho bitandukanye bya elegitoroniki yimbaraga nizunguruka, nko guhinduranya amashanyarazi, inverter, na moteri. Muri iyi porogaramu, igishushanyo mbonera hamwe nogutezimbere imiyoboro yumushoferi ningirakamaro kugirango tunoze imikorere nubwizerwe bwibikoresho.

Muri make, MOSFET yo gutwara ibinyabiziga nigice cyingenzi mubyuma bya elegitoroniki nubushakashatsi bwumuzingi. Mugushushanya neza umushoferi wumuzunguruko, birashobora kwemeza ko MOSFET ikora mubisanzwe kandi byizewe, bityo bikazamura imikorere nubwizerwe bwumuzunguruko wose.