MOSFET Driver Circuit Zvinodiwa

Nevatyairi veMOS vanhasi, pane zvakati wandei zvinodiwa:

1. Low voltage application

Kana kushandiswa kwe5V switchingmagetsi, panguva ino kana kushandiswa yechinyakare totem danda chimiro, nokuti triode kuva chete 0.7V kumusoro uye pasi kurasikirwa, zvichiita chaiyo yokupedzisira mutoro gedhi pamusoro voltage chete 4.3V, panguva ino, kushandiswa inobvumirwa gedhi voltage. ye4.5vMOSFETs kune mwero wakati wengozi.Mamiriro akafanana inoitikawo mukushandiswa kwe3V kana imwe yakaderera-voltage switching magetsi.

2.Wide voltage application

Iyo keying voltage haina kukosha kwenhamba, inosiyana nguva nenguva kana nekuda kwezvimwe zvinhu. Musiyano uyu unokonzeresa kuti dhiraivha yakapihwa MOSFET nePWM dunhu isagadzikane.

Kuitira kuchengetedza zvirinani iyo MOSFET pakakwirira gedhi voltages, mazhinji maMOSFET akamisikidza magetsi emagetsi kuti amanikidze muganho pahukuru hwegedhi voltage. Muchiitiko ichi, kana dhiraivha yedhiraivha yakaunzwa kuti ipfuure voltage yemutongi, kurasikirwa kukuru kwekuita basa kunokonzerwa.

Panguva imwecheteyo, kana musimboti wekutanga weresistor voltage divider ukashandiswa kudzikisa gedhi voltage, zvichaitika kuti kana keyed voltage yakakwira, MOSFET inoshanda nemazvo, uye kana iyo keyed voltage ikaderedzwa, gedhi voltage harina. zvakakwana, zvichikonzera kusakwana kwekutendeuka uye kudzima, izvo zvichawedzera kurasikirwa kwebasa.

MOSFET overcurrent kudzivirira wedunhu kudzivirira magetsi ekupa kupisa tsaona (1)

3. Dual voltage applications

Mune mamwe maseketi ekudzora, iyo logic chikamu chedunhu inoshandisa yakajairwa 5V kana 3.3V data voltage, nepo chikamu chemagetsi chinobuda chinoshanda 12V kana kupfuura, uye iwo maviri mavolti akabatana kune yakajairika pasi.

Izvi zvinojekesa kuti dunhu remagetsi rinofanirwa kushandiswa kuitira kuti yakaderera voltage padivi igone kushandisa yakakwira voltage MOSFET, nepo yakakwira voltage MOSFET ichikwanisa kurarama nematambudziko akafanana akataurwa mu1 uye 2.

Muzviitiko zvitatu izvi, kuvakwa kwetotem pole hakugone kuzadzisa zvinodiwa, uye mazhinji aripo eMOS mutyairi ICs anoita seasingasanganisire gedhi magetsi ekumisa kuvaka.