Iingcamango zokusombulula ukuveliswa kobushushu obunzulu bee-MOSFETs

Andazi ukuba ufumene ingxaki, i-MOSFET yenza njengesixhobo sokuhambisa umbane ngexesha lokusebenza ngamanye amaxesha ubushushu obukhulu, ifuna ukusombulula ingxaki yokufudumeza.I-MOSFET, okokuqala kufuneka siqonde oonobangela, ngoko kufuneka sivavanye, ukuze sifumanise apho ingxaki ikhoyo. Ngokufunyanwa kweUkufudumeza kweMOS ingxaki, hamba ukhethe inqaku elichanekileyo lovavanyo olungundoqo, aluhambelani nohlalutyo, olungundoqo ekusombululeni ingxaki.

Kuvavanyo lonikezelo lwamandla, ukongeza kumlinganiselo wolawulo lwesekethe yezinye izixhobo zepini yombane njengobunzima, ilandelwa yi-oscilloscope yokulinganisa i-voltage waveform efanelekileyo. Xa sisiya kugqiba ukuba ngaba umbane wokutshintsha awusebenzi kakuhle, apho ukulinganisa unikezelo lwamandla kunokubonisa imeko yokusebenza ayiqhelekanga, imveliso yomlawuli we-PWM ayiqhelekanga, umjikelo we-pulse duty kunye ne-amplitude ayiqhelekanga, ukutshintsha i-MOSFET ukungasebenzi ngokufanelekileyo, kubandakanywa ne-transformer yesibini kunye necala eliphambili kunye nemveliso yempendulo ayifanelekanga.

Ingaba indawo yovavanyo lukhetho olufanelekileyo lubaluleke kakhulu, ukhetho oluchanekileyo lunokukhusela kwaye lunokwethenjelwa imilinganiselo, kodwa lukwavumela ukuba sixazulule ngokukhawuleza ukufumanisa isizathu.

Ngokubanzi unobangela wokufudumeza kweMOSFET kukuba:

1: I-G-pole drive voltage ayonelanga.

2: I-ID yangoku kwidrain kunye nomthombo uphezulu kakhulu.

3: Ifreyithi yokuqhuba iphezulu kakhulu.

Ke ugqaliselo lovavanyo kwiMOSFET, luvavanye ngokuchanekileyo umsebenzi walo, oluyingcambu yengxaki.

Kufuneka kuqatshelwe ukuba xa kufuneka sisebenzise uvavanyo lwe-oscilloscope, kufuneka sihlawule ingqalelo ekhethekileyo ekunyuseni ngokuthe ngcembe kwi-voltage yegalelo, ukuba sifumanisa ukuba i-voltage ephezulu okanye yangoku ngaphaya koluhlu lwethu loyilo, ngeli xesha kufuneka sinikele ingqalelo ukufudumeza kwe-MOSFET, ukuba kukho i-anomaly, kufuneka ucime ngokukhawuleza ukunikezelwa kombane, ukulungisa ingxaki apho ingxaki ikhona, ukukhusela i-MOSFET ukuba yonakaliswe.