Za ntchito mfundo ya mphamvu MOSFET

Pali mitundu ingapo yazizindikiro zamagawo zomwe zimagwiritsidwa ntchito pa MOSFETs. Mapangidwe ofala kwambiri ndi mzere wowongoka woyimira njira, mizere iwiri yolunjika ku njira yomwe imayimira gwero ndi kukhetsa, ndi mzere wamfupi wofanana ndi kanjira kumanzere kuyimira chipata. Nthawi zina mzere wowongoka woyimira tchanelo umasinthidwanso ndi mzere wosweka kuti usiyanitse pakati pa njira yowonjezeramosfet kapena depletion mode mosfet, yomwe imagawidwanso mu N-channel MOSFET ndi P-channel MOSFET mitundu iwiri ya zizindikiro za dera monga momwe zasonyezedwera pachithunzichi (malo a muvi ndi osiyana).

Power MOSFETs amagwira ntchito m'njira ziwiri zazikulu:

(1) Mphamvu yabwino ikawonjezedwa ku D ndi S (drain positive, source negative) ndi UGS=0, mphambano ya PN mdera la P ndi dera la N drain imakondera, ndipo palibe kudutsa pakati pa D. ndi S. Ngati zabwino voteji UGS anawonjezera pakati G ndi S, palibe chipata panopa kuyenda chifukwa chipata insulated, koma voteji zabwino pachipata kukankhira mabowo kutali P dera pansi, ndi chonyamulira ochepa. ma elekitironi adzakopeka ndi P dera pamwamba Pamene UGS ndi wamkulu kuposa voteji UT, ndende ya elekitironi pamwamba pa P dera pansi pa chipata adzaposa ndende dzenje, motero kupanga P-mtundu semiconductor antipattern wosanjikiza N- mtundu wa semiconductor; wosanjikiza uyu antipattern amapanga N-mtundu njira pakati pa gwero ndi kukhetsa, kotero kuti PN mphambano kutha, gwero ndi kukhetsa conductive, ndi kukhetsa panopa ID ukuyenda mu kuda. UT imatchedwa mphamvu yamagetsi kapena mphamvu yamagetsi, ndipo pamene UGS imadutsa UT, mphamvu yoyendetsera bwino imakhala yowonjezereka, ndipo ID ndi yaikulu. Kuchuluka kwa UGS kupitirira UT, kulimba kwa conductivity, kumapangitsanso ID.

(2) Pamene D, S kuphatikiza ma voltage negative (source positive, drain negative), mphambano ya PN imakhala yokondera, yofanana ndi diode yamkati (yopanda kuyankha mwachangu), ndiko kuti,MOSFET ilibe mphamvu yotsekereza, imatha kuonedwa ngati gawo losinthira motsatizana.

NdiMOSFET mfundo ntchito Tingaone, conduction ake mmodzi polarity zonyamulira nawo conductive, wotchedwanso unipolar transistor.MOSFET pagalimoto zambiri zochokera mphamvu IC ndi MOSFET magawo kusankha dera loyenerera, MOSFET zambiri ntchito kusinthana. magetsi opangira magetsi. Popanga magetsi osinthira pogwiritsa ntchito MOSFET, anthu ambiri amalingalira za kukana, mphamvu yayikulu, komanso kuchuluka kwa MOSFET. Komabe, anthu nthawi zambiri amangoganizira zinthu izi, kuti dera lizitha kugwira ntchito bwino, koma si njira yabwino yopangira. Kuti mudziwe zambiri, MOSFET iyeneranso kuganiziranso zambiri zake. Kwa MOSFET yotsimikizika, mayendedwe ake oyendetsa, nsonga yaposachedwa yamagalimoto, ndi zina zotero, zidzakhudza kusintha kwa MOSFET.