MOSFET Driver Circuit Izidingo

Ngabashayeli banamuhla be-MOS, kunezidingo ezimbalwa ezingavamile:

1. Ukusetshenziswa kwamandla kagesi aphansi

Lapho ukusetshenziswa 5V ukushintshaukunikezwa kwamandla kagesi, ngalesi sikhathi uma ukusetshenziswa bendabuko totem isigxobo isakhiwo, ngoba triode kube kuphela 0.7V ukulahlekelwa phezulu naphansi, okuholela ethile esangweni umthwalo wokugcina on the voltage kuphela 4.3V, ngalesi sikhathi, ukusetshenziswa evunyelwe esangweni voltage. kwe 4.5vAma-MOSFET kunezinga elithile lengozi.Isimo esifanayo futhi kwenzeka ekusetshenzisweni kwe-3V noma enye i-low-voltage switching power supply.

2.Ukusetshenziswa kwe-voltage ebanzi

I-voltage yokhiye ayinalo inani lezinombolo, iyahlukahluka ngezikhathi ezithile noma ngenxa yezinye izici. Lokhu kuhluka kubangela ukuthi i-voltage yokushayela enikezwe i-MOSFET yisekethe ye-PWM ukuthi ingazinzi.

Ukuze kuvikelwe kangcono i-MOSFET kuma-voltage amasango aphezulu, ama-MOSFET amaningi ashumeke izilawuli zikagesi ukuze aphoqelele umkhawulo kubukhulu bamandla kagesi wesango. Kulokhu, lapho i-voltage yokushayela ilethwa ukuze idlule i-voltage yesilawuli, ukulahlekelwa okukhulu komsebenzi omile kubangelwa.

Ngasikhathi sinye, uma isimiso esiyisisekelo se-resistor voltage divider sisetshenziselwa ukunciphisa i-voltage yesango, kuzokwenzeka ukuthi uma i-voltage ye-keyed iphakeme, i-MOSFET isebenza kahle, futhi uma i-voltage engukhiye incishisiwe, i-voltage yesango ayikho. okwanele, okuholela ekuvuleni nokuvala okunganele, okuzothuthukisa ukulahlekelwa kokusebenza.

Isifunda sokuvikela esidlulele se-MOSFET ukuze kugwenywe izingozi zokuphelelwa amandla kwamandla(1)

3. Izicelo zamandla amabili

Kwamanye amasekhethi okulawula, ingxenye enengqondo yesekhethi isebenzisa i-voltage evamile engu-5V noma engu-3.3V, kuyilapho ingxenye yamandla okukhiphayo isebenza ku-12V noma ngaphezulu, futhi ama-voltage amabili axhumeke endaweni evamile.

Lokhu kukwenza kucace ukuthi isifunda sokuphakelwa kukagesi kufanele sisetshenziswe ukuze uhlangothi lukagesi oluphansi lukwazi ukulawula amandla kagesi aphezulu i-MOSFET, kuyilapho i-MOSFET kagesi ephezulu izokwazi ukubhekana nobunzima obufanayo obushiwo ku-1 no-2.

Kulezi zimo ezintathu, ukwakhiwa kwesigxobo se-totem akukwazi ukuhlangabezana nezidingo zokukhiphayo, futhi ama-IC amaningi akhona omshayeli we-MOS abonakala engabandakanyi ukwakhiwa komkhawulo kagesi wesango.