Indlela efanele yokukhetha ama-MOSFET

Isikhathi Sokuthumela: May-20-2024

Khetha i-MOSFET efanele yomshayeli wesifunda iyingxenye ebaluleke kakhulu ye-I-MOSFET ukukhetha akukuhle kuzothinta ngqo ukusebenza kahle kwesekethe yonke kanye nezindleko zenkinga, okulandelayo sithi i-engeli enengqondo yokukhethwa kwe-MOSFET.

1, i-N-channel kanye nokukhethwa kwesiteshi se-P
(1), Kumasekhethi avamile, lapho i-MOSFET imiswa phansi futhi umthwalo uxhunywe ku-voltage ye-trunk, i-MOSFET yenza iswishi yaseceleni ye-voltage ephansi. Kushintshwayo ohlangothini lwe-voltage ephansi, i-N-channel MOSFET kufanele isetshenziswe, ngenxa yokucatshangelwa kwamandla kagesi adingekayo ukuze ucishwe noma uvule idivayisi.

(2), lapho i-MOSFET ixhunywe ebhasini futhi umthwalo usumisiwe, kufanele kusetshenziswe iswishi eseceleni kagesi ophezulu. Isiteshi se-PAma-MOSFET zivame ukusetshenziswa kule topology, futhi ukucatshangelwa voltage drive.

2, ufuna ukukhetha okulungileI-MOSFET, kuyadingeka ukunquma i-voltage edingekayo ukuze ushayele isilinganiso se-voltage, kanye nokuklama kwendlela elula yokuqalisa. Uma i-voltage elinganiselwe inkulu, idivayisi izodinga izindleko eziphezulu. Ngemiklamo ephathekayo, ama-voltage aphansi avame kakhulu, kuyilapho imiklamo yezimboni, ama-voltage aphezulu ayadingeka. Ngokuya kokuhlangenwe nakho okungokoqobo, amandla kagesi akaliwe kufanele abe mkhulu kune-trunk noma ibhasi. Lokhu kuzohlinzeka ngokuvikeleka okwanele kokuphepha ukuze i-MOSFET ingaphumeleli.

I-3, elandelwa yisakhiwo sesifunda, ukulinganisa kwamanje kufanele kube umkhawulo wamanje umthwalo ongamelana nawo ngaphansi kwazo zonke izimo, okubuye kusekelwe ekuphepheni kwezici ezidingekayo okufanele zicatshangelwe.

4. Ekugcineni, ukusebenza kokushintsha kwe-MOSFET kunqunywa. Kunamapharamitha amaningi athinta ukusebenza kokushintsha, kodwa okubaluleke kakhulu yisango/ukukhipha amanzi, isango/umthombo kanye namandla okukhipha/umthombo. Lawa mandla adala ukulahlekelwa kokushintsha kudivayisi ngoba kufanele akhokhiswe ngesikhathi sokushintsha ngakunye.