Merero e mengata ea lienjiniere tsa hardware e phethoa ka boto ea lesoba, empa ho na le ts'ebetso ea ho kopanya li-terminals tse ntle le tse mpe tsa phepelo ea motlakase ka phoso, e leng se lebisang ho likarolo tse ngata tsa elektronike tse tukang, esita le boto eohle e senngoa, 'me e tlameha ho ts'oaroa hape, ha ke tsebe hore na ke tsela efe e ntle ea ho e rarolla?
Pele ho tsohle, ho se tsotelle ke ntho e ke keng ea qojoa, le hoja e le feela ho khetholla lithapo tse peli tse ntle le tse mpe, tse khubelu le tse ntšo, li ka 'na tsa fetisoa hang, re ke ke ra etsa liphoso; Lihokelo tse leshome li ke ke tsa tsamaea hampe, empa 1,000? Ho thoe'ng ka 10,000? Ka nako ena ho ke ke ho le thata ho re, ka lebaka la bohlasoa rona, ea isang ho likarolo tse ling tsa elektronike le litsupa chesoa, lebaka le ka sehloohong ke hore hona joale ke le ho hongata haholo lenģosa likarolo li robehile, kahoo re lokela ho nka mehato ea ho thibela kgokelo reverse.
Ho na le mekhoa e latelang e sebelisoang hangata:
01 diode mofuta oa potoloho ea anti-reverse tshireletso
Diode e ka pele e hokahane ka letoto la matla a matle ho sebelisa ka botlalo litšoaneleho tsa diode tsa ho tsamaisa pele le ho fokotsa morao. Tlas'a maemo a tloaelehileng, tube ea bobeli e tsamaisa 'me boto ea potoloho e sebetsa.
Ha motlakase o khutlisetsoa morao, diode e khaotsoe, phepelo ea motlakase e ke ke ea etsa loop, 'me boto ea potoloho ha e sebetse, e ka thibelang bothata ba phepelo ea motlakase ka katleho.
02 Rectifier borokho mofuta oa potoloho ea anti-reverse tshireletso
Sebelisa borokho ba rectifier ho fetola matla a ho kenya motlakase ho se nang polar, ho sa tsotellehe hore na motlakase o hokahane kapa o khutliselitsoe morao, boto e sebetsa ka tloaelo.
Haeba silicon diode e na le ho theoha ha khatello ea hoo e ka bang 0.6 ~ 0.8V, germanium diode e boetse e na le ho theoha ha khatello ea hoo e ka bang 0.2 ~ 0.4V, haeba khatello ea khatello e le khōlō haholo, tube ea MOS e ka sebelisoa bakeng sa phekolo ea anti-reaction, ho theoha ha khatello ea MOS tube e nyenyane haholo, ho fihlela ho milliohm tse seng kae, 'me ho theoha ha khatello ho batla ho sa tsotellehe.
03 MOS tube anti-reverse tshireletso potoloho
MOS tube ka lebaka la ntlafatso ea ts'ebetso, thepa ea eona le lintlha tse ling, ho hanyetsa ha eona ka hare ho nyenyane, tse ngata li na le boemo ba milliohm, kapa esita le tse nyenyane, e le hore ho theoha ha motlakase oa potoloho, tahlehelo ea matla e bakoang ke potoloho e nyenyane haholo, kapa esita le ha e na thuso, kahoo khetha MOS tube ho sireletsa potoloho ke tsela e khothalletsoang haholoanyane.
1) Tšireletso ea NMOS
Joalokaha ho bonts'itsoe ka tlase: Nakong ea motlakase, diode ea parasitic ea tube ea MOS e butsoe, 'me tsamaiso e etsa loop. Monyetla oa mohloli oa S o ka bang 0.6V, ha bokhoni ba heke ea G ke Vbat. Motlakase oa ho bula oa tube ea MOS o feteletse haholo: Ugs = Vbat-Vs, heke e phahame, ds ea NMOS e ntse e le teng, diode ea parasitic e khutšoanyane, 'me tsamaiso e etsa loop ka ho fihlella ds ea NMOS.
Haeba motlakase o khutlisetsoa morao, motlakase oa NMOS ke 0, NMOS e khaotsoe, diode ea parasitic e khutlisetsoa morao, 'me potoloho e khaotsoe, kahoo e etsa tšireletso.
2) Tšireletso ea PMOS
Joalokaha ho bonts'itsoe ka tlase: Nakong ea motlakase, diode ea parasitic ea tube ea MOS e butsoe, 'me tsamaiso e etsa loop. Monyetla oa mohloli oa S o mabapi le Vbat-0.6V, ha bokhoni ba heke ea G ke 0. Motlakase oa ho bula oa tube ea MOS o feteletse haholo: Ugs = 0 - (Vbat-0.6), heke e itšoara ka mokhoa o tlaase, ds ea PMOS e ntse e tsoela pele, diode ea parasitic e khutšoanyane, 'me tsamaiso e etsa leqhubu la phihlello ea PMOS.
Haeba motlakase o khutlisetsoa morao, on-voltage ea NMOS e kholo ho feta 0, PMOS e khaotsoe, diode ea parasitic e khutlisetsoa morao, 'me potoloho e khaotsoe, kahoo e etsa tšireletso.
Tlhokomeliso: likhoele tsa li-tubes tsa NMOS ho li-electrode tse mpe, likhoele tsa likhoele tsa PMOS ho li-electrode tse ntle, 'me tataiso ea diode ea parasitic e lebile ntlheng ea hajoale e hokahaneng hantle.
Ho fihlella ha lipalo tsa D le S tsa tube ea MOS: hangata ha ho sebelisoa tube ea MOS e nang le N channel, hona joale hangata e kena ho tloha D pole ebe e phalla ho tloha S pole, 'me PMOS e kena' me D e tsoa ho S pole, 'me se fapaneng ke' nete ha se sebelisoa potolohong ena, boemo ba motlakase ba tube ea MOS bo kopana ka ho tsamaisa diode ea parasitic.
Thepa ea MOS e tla buleloa ka ho feletseng ha feela motlakase o loketseng o thehoa pakeng tsa lipalo tsa G le S. Ka mor'a ho khanna, ho tšoana le ha sesebelisoa se koetsoe pakeng tsa D le S, 'me hona joale ke khanyetso e tšoanang ho tloha ho D ho ea ho S kapa S ho ea ho D.
Lits'ebetsong tse sebetsang, G pole hangata e hokahane le sehanyetsi, 'me e le ho thibela tube ea MOS hore e senyehe, diode ea taolo ea motlakase le eona e ka eketsoa. Capacitor e kopantsoeng ka ho bapa le karohano e na le phello e bonolo ea ho qala. Ka nako eo hona joale e qalang ho phalla, capacitor e qosoa 'me motlakase oa G pole o hahoa butle-butle.
Bakeng sa PMOS, ha ho bapisoa le NOMS, Vgs e hlokahala hore e be kholo ho feta matla a moeli. Hobane motlakase oa ho bula e ka ba 0, phapang ea khatello pakeng tsa DS ha e kholo, e leng molemo ho feta NMOS.
04 Tšireletso ea fuse
Lihlahisoa tse ngata tse tloaelehileng tsa elektronike li ka bonoa ka mor'a ho bula karolo ea phepelo ea motlakase ka fuse, phepelong ea motlakase e khutlisetsoa morao, ho na le potoloho e khutšoanyane ea potoloho ka lebaka la hona joale e kholo, ebe fuse e fofa, e phetha karolo ea ho sireletsa potoloho, empa ka tsela ena ho lokisoa le ho nkela sebaka ho thata haholoanyane.
Nako ea poso: Jul-10-2023
