I. Tanthauzo la MOSFET
Monga zida zoyendetsedwa ndi ma voltage, zida zamakono, Zithunzi za MOSFET kukhala ndi ntchito zambiri m'mabwalo, makamaka machitidwe amagetsi. Ma diode a thupi la MOSFET, omwe amadziwikanso kuti parasitic diode, sapezeka m'magawo ophatikizika ophatikizika, koma amapezeka m'zida zosiyana za MOSFET, zomwe zimapereka chitetezo cham'mbuyo komanso kupitiliza kwanthawi yayitali zikamayendetsedwa ndi mafunde apamwamba komanso ngati zonyamula zonyamula zilipo.
Chifukwa cha kukhalapo kwa diode iyi, chipangizo cha MOSFET sichingawonekere kusinthasintha mu dera, monga mu dera lolipiritsa kumene kulipiritsa kwatha, mphamvu imachotsedwa ndipo batri imabwerera kunja, zomwe nthawi zambiri zimakhala zosafunikira.
Njira yothetsera vutoli ndikuwonjezera diode kumbuyo kuti mupewe magetsi obwerera kumbuyo, koma mawonekedwe a diode amatsimikizira kufunikira kwa kutsika kwamagetsi kwa 0.6 ~ 1V, zomwe zimapangitsa kuti pakhale kutentha kwakukulu pamafunde akulu ndikuwononga zinyalala. za mphamvu ndi kuchepetsa mphamvu zonse zogwirira ntchito. Njira ina ndikuwonjezera MOSFET yobwerera kumbuyo, kugwiritsa ntchito kukana kwa MOSFET kuti akwaniritse mphamvu zamagetsi.
Zindikirani kuti pambuyo pa conduction, MOSFET's non-directional, kotero pambuyo pa kukakamiza koyendetsa, imakhala yofanana ndi waya, yokhayokha, yopanda mphamvu yamagetsi, yomwe nthawi zambiri imakhala yotsutsana ndi ma miliohm angapo.mamiliyoni anthawi yake, komanso osalozera, kulola mphamvu ya DC ndi AC kudutsa.
II. Makhalidwe a MOSFETs
1, MOSFET ndi chipangizo choyendetsedwa ndi voteji, palibe gawo loyendetsa lomwe limafunikira kuyendetsa mafunde akulu;
2, High athandizira kukana;
3, yotalikirapo ntchito pafupipafupi osiyanasiyana, kuthamanga kwambiri kusintha, kutayika kochepa
4, AC omasuka high impedance, phokoso otsika.
5,Kugwiritsa ntchito kangapo kofananira, onjezerani zotulutsa
Chachiwiri, kugwiritsa ntchito ma MOSFET potsata njira zodzitetezera
1, pofuna kuwonetsetsa kuti MOSFET ikugwiritsidwa ntchito motetezeka, pamapangidwe a mzere, sayenera kupitilira mphamvu yapaipi yamagetsi, gwero lamphamvu kwambiri lotayikira, voteji yachipata, magetsi apano ndi malire ena.
2, mitundu yosiyanasiyana ya MOSFET yomwe ikugwiritsidwa ntchito, iyenerakukhala mosamalitsa mkati molingana ndi mwayi wokondera wofunikira woyendera dera, kutsatira polarity ya MOSFET offset.
3. Mukayika MOSFET, tcherani khutu ku malo osungiramo kuti mupewe pafupi ndi chinthu chotentha. Pofuna kupewa kugwedezeka kwa zopangira, chipolopolocho chiyenera kumangirizidwa; kupindika mapini kuyenera kuchitidwa mokulirapo kuposa kukula kwa mizu ya 5mm kuti mphiniyo isapindike ndi kutayikira.
4, chifukwa chazovuta kwambiri zolowera, ma MOSFET amayenera kufupikitsidwa kuchokera pa pini panthawi yoyendetsa ndi kusungirako, ndi kupakidwa ndi zotchinga zachitsulo kuti apewe kuwonongeka kwachipata kwakunja.
5. Magetsi a chipata cha ma MOSFET sangasinthidwe ndipo akhoza kusungidwa pamalo otseguka, koma kukana kwa insulated-gate MOSFETs kumakhala kwakukulu kwambiri pamene sakugwiritsidwa ntchito, choncho electrode iliyonse iyenera kukhala yochepa. Mukagulitsa ma MOSFET a zipata, tsatirani dongosolo la source-drain-gate, ndikugulitsa ndikuzimitsa.
Kuti muwonetsetse kuti ma MOSFET akugwiritsidwa ntchito motetezeka, muyenera kumvetsetsa bwino momwe ma MOSFET alili komanso njira zodzitetezera pogwiritsira ntchito ndondomekoyi, ndikuyembekeza kuti chidule chapamwambachi chidzakuthandizani.
Nthawi yotumiza: May-15-2024
