Halin da'irar aikace-aikacen mosfet

Mafi mahimmancin fasalinmofetyana canzawa, don haka ana iya amfani da shi sosai a wurare daban-daban waɗanda ke buƙatar canjin lantarki, kamar sauya kayan wuta da na'urorin tuƙi. A zamanin yau, yanayin da'ira na aikace-aikacen mosfet:

1, ƙarancin wutar lantarki aikace-aikace

Lokacin amfani da wutar lantarki na 5V, idan ana amfani da tsarin totem na gargajiya na gargajiya, saboda ƙarancin ƙarfin lantarki na transistor be kusan 0.7V ne kawai, ainihin ƙarfin wutar lantarki a ƙarshe da aka ɗora akan ƙofar shine kawai 4.3V, a wannan lokacin, idan muka zaɓa. mosfet tare da ƙarfin lantarki na 4.5V, duk da'irar za ta sami takamaiman haɗari. Irin wannan matsala za ta faru lokacin amfani da 3V ko wasu ƙananan wutar lantarki.

2, aikace-aikacen wutar lantarki mai faɗi

A cikin rayuwarmu ta yau da kullun, wutar lantarki da muke shigar ba ƙayyadadden ƙima ba ne, lokaci ko wasu abubuwa za su shafe shi. Wannan tasirin zai haifar da da'irar pwm don samar da wutar lantarki mara ƙarfi zuwa mosfet. Don haka don ba da damar mafi yawan transistor suyi aiki lafiya a babban ƙarfin kofa, da yawamofetsa zamanin yau akwai ginannun masu sarrafa wutar lantarki waɗanda ke iyakance wutar lantarkin ƙofar. A wannan lokaci, lokacin da wutar lantarki da aka kawota ya zarce ƙarfin lantarki na mai sarrafawa, yawan adadin wutar lantarki yana faruwa. A lokaci guda, idan an rage ƙarfin wutar lantarki ta ƙofar ta amfani da ka'idar rarraba wutar lantarki ta resistor, ƙarfin shigarwar zai yi girma sosai kuma mosfet zai yi aiki da kyau. Lokacin da aka rage ƙarfin shigarwar, ƙarfin wutar lantarki na ƙofar bai isa ba, yana haifar da rashin cikawa da ƙara yawan wutar lantarki.