Dab tsi yog qhov sib txawv ntawm linear tswj fais fab mov thiab lub zog hloov hluav taws xob?
Lub linear tswj fais fab mov hloov pauv thiab tswj nws cov zis voltage thiab tam sim no los ntawm qhov sib txawv ntawm qhov kev coj ua ntawm lub transistor, uas nyob rau hauv ib txoj kab tswj fais fab mov yog sib npaug rau qhov sib txawv ntawm cov resistor, txuas nrog hauv cov khoom siv hluav taws xob. Txij li thaum qhov sib txawv resistor ntws tib yam tam sim no raws li lub nra, nws siv ntau lub zog thiab ua rau kom sov thiab tsis tshua muaj hluav taws xob hloov pauv tau zoo. Linear voltage regulator fais fab mov muaj ib tug feature yog hais tias nws lub hwj chim ntaus ntawv regulator ua hauj lwm nyob rau hauv lub linear cheeb tsam, cia siab rau lub voltage poob ntawm tus regulator ncej kom stabilize cov zis. Vim qhov loj zoo li qub poob ntawm lub raj hloov kho, nws yog ib qho tsim nyog yuav tsum tau nruab ib lub dab dej kub loj kom dissipate cua sov. Vim hais tias lub transformer ntawm linear fais fab mov ua hauj lwm nyob rau hauv industrial zaus (50Hz), yog li ntawd cov loj yog loj.
Cov khoom siv hluav taws xob tswj hluav taws xob feem ntau yog siv rau hauv cov ntawv siv hluav taws xob tsawg, xws li LDOs yuav tsum tau ua kom tau raws li qhov sib txawv voltage. Cov zis hluav taws xob hloov kho tus nqi thiab ripple yog qhov zoo dua, qhov ua tau zoo yog qis dua, thiab tsawg dua peripheral Cheebtsam yuav tsum tau, uas yog tus nqi qis. Lub Circuit Court yog qhov yooj yim.
Linear regulated fais fab mov muaj qhov zoo ntawm kev ruaj ntseg, me me ripple, muaj kev ntseeg siab, yooj yim ua rau ntau qhov tso zis tsis tu ncua adjustable fais fab mov. Qhov tsis zoo yog qhov ntim loj, loj, kuj tsis tshua muaj txiaj ntsig. Hom kev tswj fais fab no thiab muaj ntau hom kev tso tawm los ntawm qhov xwm txheej ntawm cov khoom siv hluav taws xob tswj tau tuaj yeem muab faib ua cov khoom siv hluav taws xob tswj hwm, tswj cov khoom siv hluav taws xob tam sim no thiab cov txheej txheem tswj hluav taws xob, tswj tam sim no hauv kev tswj hwm hluav taws xob tswj tam sim no (dual regulated ) lub zog. Los ntawm tus nqi tso zis tuaj yeem muab faib ua cov khoom siv hluav taws xob ruaj khov, hloov pauv hloov tau thiab potentiometer tsis tu ncua kho hom. Los ntawm cov zis qhia tawm, nws tuaj yeem muab faib ua tus taw qhia taw qhia hom thiab hom duab digital.
Switching fais fab mov muaj feem xyuam rau tag nrho cov voltage ntau yam, tsis tas yuav tsum tau sib txawv voltage, yuav siv tau sib txawv Circuit Court topology kom ua tiav cov zis sib txawv. Kev hloov kho tus nqi thiab cov zis tawm ripple tsis zoo li linear fais fab mov, thiab qhov ua tau zoo yog siab. Nws xav tau ntau yam khoom siv peripheral thiab muaj tus nqi siab. Lub Circuit Court yog qhov nyuaj. Switching DC tswj fais fab mov nws hom Circuit Court mas muaj ib zaug-kawg flyback, ib leeg-kawg rau pem hauv ntej, ib nrab-choj, thawb-rub thiab tag nrho-bridge. Nws thiab qhov sib txawv ntawm cov kab hluav taws xob tswj hluav taws xob yog qhov hluav taws xob ntawm lub tshuab hluav taws xob tsis ua haujlwm ntawm qhov zaus tab sis ua haujlwm hauv kaum ntawm kilohertz mus rau ob peb megahertz. Lub hwj chim raj tsis ua hauj lwm nyob rau hauv lub linear cheeb tsam, tab sis saturation thiab cut-off cheeb tsam, uas yog, ua hauj lwm nyob rau hauv lub switching xeev; switching DC tswj fais fab mov kuj muaj npe.
Qhov sib txawv loj tshaj plaws ntawm cov kab hluav taws xob tswj hluav taws xob thiab hloov hluav taws xob yog cov hlab (txawm yog bipolar lossis MOSFET) hauv cov kab hluav taws xob tswj hluav taws xob ua haujlwm nyob rau hauv lub xeev linear, thaum cov hlab hauv kev hloov hluav taws xob ua haujlwm hauv lub xeev hloov. Linear tswj cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob hloov tau muaj npe raws li.
