Circuit mamiriro ekushandisa mosfet

Chinhu chinonyanya kukosha chemosfetiri kushandura, saka inogona kushandiswa zvakanyanya mumaseketi akasiyana anoda kuchinjika kwemagetsi, sekuchinja magetsi uye madhiraivha ekutyaira. Mazuva ano, mosfet application yedunhu mamiriro:

1, low voltage applications

Paunenge uchishandisa 5V magetsi emagetsi, kana iyo yechinyakare totem pole chimiro ichishandiswa, nekuda kwekudonha kwevoltage ye transistor be inongosvika 0.7V, iyo chaiyo voltage pakupedzisira yakatakurwa pagedhi ingori 4.3V, panguva ino, kana tikasarudza. mosfet ine voltage ye4.5V, dunhu rose richava nenjodzi. Dambudziko rimwechete richaitika kana uchishandisa 3V kana imwe yakaderera-voltage magetsi.

2, yakakura voltage application

Muhupenyu hwedu hwezuva nezuva, iyo voltage yatinoisa haisi iyo yakagadziriswa kukosha, inokanganiswa nenguva kana zvimwe zvinhu. Izvi zvinokonzeresa kuti pwm yedunhu ipe isina kugadzikana yekutyaira voltage kune mosfet. Saka kuitira kubvumidza mos transistors kuti ishande zvakachengeteka pamagedhi akakwira voltages, akawandamosfetsmazuvano ane ma-built-in voltage regulators anodzikamisa gedhi voltage. Panguva ino, kana iyo yakapihwa dhiraivha voltage inodarika voltage yeregulator, huwandu hwakakosha hwekushandiswa kwesimba kunoitika. Panguva imwecheteyo, kana gedhi remagetsi richingoderedzwa uchishandisa resistor voltage divider musimboti, iyo yekupinda voltage ichave yakakwira uye mosfet ichashanda nemazvo. Kana magetsi ekupinza aderedzwa, gedhi remagetsi harina kukwana, zvichikonzera kusakwana conduction uye kuwedzera simba rekushandisa.