Linear Regulated PSU yog dab tsi?
Linear regulated fais fab mov yog ib chav kawm ntawm DC tswj fais fab mov siv ua ntej. Raws li kev ua haujlwm ntawm lub tshuab hloov kho, peb feem ntau faib cov kev tswj fais fab rau hauv ob pawg: linear tswj fais fab mov thiab hloov hluav taws xob tswj hluav taws xob. Linear regulated DC fais fab mov yog tus cwj pwm los ntawm: cov zis voltage tshaj qhov input voltage yog tsawg; lub sij hawm teb ceev ceev, cov zis ripple yog me me; Tsawg suab nrov tsim los ntawm kev ua haujlwm; low efficiency (tam sim no feem ntau saib LDO yog los daws qhov teeb meem ntawm efficiency thiab qhov tshwm sim ntawm); Thaum tshav kub kub (tshwj xeeb tshaj yog high-power fais fab mov), indirectly mus rau lub system kom lub thermal suab nrov.
Raws li kev khiav hauj lwm lub xeev ntawm lub regulator raj, peb feem ntau faib cov tswj fais fab mov rau hauv ob pawg: linear tswj fais fab mov thiab switching tswj fais fab mov. Tsis tas li ntawd, muaj cov khoom siv hluav taws xob me me uas siv lub zog tswj hluav taws xob. Lub linear tswj fais fab mov ntawm no yog hais txog DC tswj fais fab mov nyob rau hauv uas lub regulator raj ua hauj lwm nyob rau hauv ib tug linear xeev. Ib tus neeg tswj xyuas kev ua haujlwm hauv lub xeev linear tuaj yeem nkag siab zoo li no: RW (saib kev tshuaj ntsuam hauv qab) yog qhov sib txawv tsis tu ncua, piv txwv li linear.
Nyob rau hauv lub switching fais fab mov tsis zoo ib yam, lub switching tube (nyob rau hauv lub switching fais fab mov, peb feem ntau hu ua lub hloov lub raj switching tube) yog ua hauj lwm nyob rau hauv lub on thiab tawm ob lub xeev: on - kuj yog heev me me; tawm - tsis kam yog loj heev. Ua haujlwm nyob rau hauv lub xeev hloov ntawm lub raj yog pom tseeb tsis yog lub xeev linear. Linear tswj fais fab mov yog ib qho kev siv thaum ntxov ntawm chav kawm ntawm DC tswj fais fab mov.
Linear tswj fais fab mov nta
1, qis efficiency;
2, tsis tshua muaj suab nrov tsim los ntawm kev ua haujlwm;
3, ceev teb ceev, me me tso zis ripple;
4, qhov tso zis voltage yog qis dua qhov input voltage;
5, kev tsim hluav taws xob loj (tshwj xeeb tshaj yog lub zog hluav taws xob siab), tsis ncaj qha ntxiv cov suab nrov thermal rau lub cev.
Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm linear tswj fais fab mov
Qhov zoo
Cov zis hluav taws xob yog qhov zoo, tsis tshua muaj ripple, thiab tsis tas yuav siv cov khoom siv inductive;
Qhov tsis zoo
Lub conversion efficiency yog tsawg, tshwj xeeb tshaj yog yog hais tias qhov sib txawv ntawm cov input thiab output voltages yog loj. Yog hais tias cov zis tam sim no kuj loj, yuav muaj qhov pom tseeb cua sov thiab kub kub tshwm sim, thiab tej zaum yuav hlawv tawm lub regulator.
