Merero e mengata ea lienjiniere tsa hardware e phethoa ka boto ea lesoba, empa ho na le ts'ebetso ea ho hokahanya liteishene tse ntle le tse mpe tsa motlakase, e leng se lebisang likarolong tse ngata tsa elektronike tse tukang, esita le boto eohle e senyeha, 'me e tlameha ho be welded hape, Ha ke tsebe tsela e molemo ea ho rarolla eona?
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 thata ho re, ka lebaka la bohlasoa ba rona, e lebisang ho likarolo tse ling tsa elektronike le li-chips li chesoa, lebaka le ka sehloohong ke hore hona joale ho na le likarolo tse ngata haholo tsa lenģosa li robehile, kahoo re lokela ho nka mehato ea ho thibela khokahanyo e fapaneng. .
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 ho theoha ha khatello ho le leholo haholo, tube ea MOS e ka sebelisoa bakeng sa phekolo ea anti-reaction, khatello ea khatello ea tube ea MOS e nyenyane haholo, ho fihlela ho miliohm 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 tse nyenyane haholo, e le hore ho theoha ha motlakase oa potoloho, tahlehelo ea matla e bakoang ke potoloho e nyenyane haholo, kapa e sa tsotellehe. , 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 fetisisa haholo: Ugs = 0 - (Vbat-0.6), heke e itšoara joaloka boemo bo tlaase. , ds ea PMOS e ntse e tsoela pele, diode ea parasitic e khuts'oane, 'me sistimi e theha leqhubu ka phihlello ea ds 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 MOS tube: 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 motlakase oa monyako. 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 khuts'oane ea potoloho ka lebaka la matla a maholo, ebe fuse e fofa, e phetha karolo ea ho sireletsa potoloho, empa ka tsela ena ho lokisoa le ho nkela sebaka ho thata le ho feta.
Nako ea poso: Jul-08-2023
