Xa uyila unikezelo lwamandla okutshintsha okanye isekethe yemoto yokuqhuba ngemosfet, abantu abaninzi baya kuthathela ingqalelo kwi-on-resistance ye-mos transistor, i-voltage ephezulu, kunye nobuninzi bangoku, kodwa yiyo yonke into abaya kuyiqwalasela. Isiphaluka esinjalo sinokusebenza, kodwa akusiyo isiphaluka esiphakamileyo kwaye asivumelekanga ukuba siyilwe njengemveliso esemthethweni.
Olona phawu lubalulekileyo lwemosfetiyatshintsha, ngoko inokusetyenziswa ngokubanzi kwiisekethe ezahlukeneyo ezifuna utshintsho lwe-elektroniki, njengokutshintsha izixhobo zombane kunye neesekethe zokuqhuba iimoto. Kule mihla, imeko yesekethe yesicelo se-mosfet:
1, izicelo zombane ophantsi
Xa usebenzisa i-5V unikezelo lwamandla, ukuba i-totem pole yemveli isakhiwo sisetyenziswa, ngenxa yokuhla kwamandla ombane we-transistor ibe kuphela malunga ne-0.7V, i-voltage yangempela ilayishwe kwisango yi-4.3V kuphela, ngeli xesha, ukuba sikhetha. i-mosfet ene-voltage ye-4.5V, isiphaluka sonke siya kuba nomngcipheko othile. Ingxaki efanayo iya kwenzeka xa usebenzisa i-3V okanye enye i-low-voltage power supply.
2, izicelo zombane obanzi
Kubomi bethu bemihla ngemihla, i-voltage esiyifakayo ayiloxabiso elimiselweyo, liya kuchaphazeleka lixesha okanye ezinye izinto. Esi siphumo siya kubangela ukuba isekethe ye-pwm ibonelele ngevolthi yokuqhuba engazinzanga kakhulu kwi-mosfet. Ke ukuze uvumele i-mos transistors ukuba isebenze ngokukhuselekileyo kumbane wesango eliphezulu, uninziiimosfetskule mihla inezixhobo zokulawula amandla ombane ezakhelweyo ezinciphisa umbane wesango. Ngeli xesha, xa i-voltage ye-drive enikeziweyo idlula i-voltage ye-regulator, isixa esibalulekileyo sokusetyenziswa kwamandla angatshintshiyo kwenzeka. Kwangaxeshanye, ukuba i-voltage yesango incitshisiwe ngokulula kusetyenziswa umgaqo we-resistor voltage divider, i-voltage yegalelo iya kuba phezulu kwaye i-mosfet iya kusebenza kakuhle. Xa i-voltage yegalelo iyancitshiswa, i-voltage yesango ayanelanga, okukhokelela ekuqhutyweni okungaphelelanga kunye nokunyuka kokusetyenziswa kwamandla.
Ixesha lokuposa: Jul-04-2024
