Ohlelweni lokushintshwa kwamandla nolunye uhlelo lokuklama isistimu yokuphakelwa kwamandla, abaklami bohlelo bazonaka kakhulu inani lemingcele emikhuluI-MOSFET, njenge-resistor ecishiwe, i-voltage enkulu yokusebenza, ukugeleza kwamandla okukhudlwana. Nakuba le elementokugxekayo, kucatshangelwa indawo engafanele kuzokwenza ukuthi isifunda sokuhlinzeka amandla singakwazi ukusebenza kahle, kodwa empeleni, lokhu kuqedwa kuphela isinyathelo sokuqala,i-MOSFET amapharamitha we-parasitic athathwa njengento ebalulekile yokubeka engcupheni umjikelezo wokuphakelwa kwamandla.
Ukushayela ngokushesha kwama-MOSFET anama-IC wokuphakela amandla
Umjikelezo omuhle womshayeli we-MOSFET unalezi zinhlinzeko ezilandelayo:
(1) Lapho iswishi ivuliwe, isekethe yomshayeli kufanele ikwazi ukukhipha i-current enkulu kakhulu, ukuze i-voltage yokusebenza ye-MOSFET gate-source inter-pole ikhuphuke ngokushesha enanini elidingekayo, ukuqinisekisa ukuthi iswishi ingashintshwa. ngokushesha futhi ngeke kube khona ama-oscillations aphezulu onqenqemeni olukhuphukayo.
(2) isikhathi sokuvula nokuvala amandla, isekethe yokushayela ingaqinisekisa ukuthi i-voltage yokusebenza yomthombo we-MOSFET yomthombo we-inter-pole igcinwa isikhathi eside, nokuqhutshwa ngempumelelo.
(3) Vala umzuzwana wesekethe yedrayivu, ingahlinzeka ngeshaneli ye-impedance ephansi ye-voltage yokusebenza kwamandla omthombo wesango le-MOSFET phakathi kokukhipha amanzi ngokushesha, ukuze kuqinisekiswe ukuthi iswishi ingacishwa ngokushesha.
(4) Ukwakhiwa okulula nokuthembekile kwamasekethe okushayela ngokuguga okuphansi nokukhala.
(5) Ngokusho kwesimo esithile ukwenza isivikelo.
Kugesi wemojula yokulawula, okuvame kakhulu ukuhlinzekwa kwamandla kagesi i-IC ishayela ngokuqondile i-MOSFET. isicelo, kufanele sinake idrayivu emikhulu inani eliphakeme kakhulu lokugeleza kwamandla, amandla okusabalalisa kwe-MOSFET 2 imingcele eyinhloko. Amandla we-Power IC drive, usayizi we-MOS wokusabalalisa amandla, inani lokumelana nedrayivu kuzobeka engcupheni izinga lokushintsha amandla e-MOSFET. Uma ukukhethwa komthamo wokusabalalisa we-MOSFET kukhulu uma kuqhathaniswa, amandla okunikezwa kwamandla kwe-IC yangaphakathi kwedrayivu akwanele, kufanele kube sesekethe yedrayivu ukuze kuthuthukiswe ikhono lokushayela, ngokuvamile kusetshenziswe isekethe ye-totem pole power supply ukuze kuthuthukiswe amandla okunikezwa kwamandla kwe-IC drive. .
Isikhathi sokuthumela: Jul-25-2024
