Ob hom kev khiav hauj lwm ntawm monolithic hloov fais fab mov
Monolithic switching power supply integrated circuits muaj qhov zoo ntawm kev sib koom ua ke siab, kev siv nyiaj ntau, qhov yooj yim tshaj plaws peripheral circuitry, qhov ntsuas kev ua tau zoo tshaj plaws, tuaj yeem ua rau muaj kev ua haujlwm siab cais hloov hluav taws xob tsis muaj zaus transformer. Nws tau qhia nyob rau hauv nruab nrab -1990s, lig successively, nws qhia tau hais tias ib tug muaj zog tseem ceeb, thiab tam sim no nws tau dhau los ua lub thoob ntiaj teb kev loj hlob ntawm nruab nrab thiab me me fais fab mov switching fais fab mov, precision switching fais fab mov thiab fais fab mov module ntawm cov nyiam. integrated circuits. Lub zog hloov hluav taws xob tsim los ntawm nws, nyob rau hauv cov nqe lus ntawm tus nqi thiab tib lub zog linear voltage regulator fais fab mov yog piv rau lub hwj chim mov efficiency yog ho txhim kho, lub ntim thiab hnyav yog heev txo. Qhov no tsim cov xwm txheej zoo rau kev nce qib thiab nrov ntawm cov khoom siv hluav taws xob hloov tshiab.
Nta ntawm monolithic switching fais fab mov
(1) TOPSWitch-II sab hauv suav nrog oscillator, yuam kev amplifier, mem tes dav modulator, rooj vag Circuit Court, high-voltage fais fab hloov raj (MOSFET), kev tsis ncaj ncees Circuit Court, dhau-tam sim no tiv thaiv Circuit Court, overheating tiv thaiv thiab hluav taws xob rov pib dua Circuit Court, kaw / tsis siv neeg restart circuit. Nws cais tawm tag nrho cov zis los ntawm daim phiaj hluav taws xob los ntawm kev siv lub tshuab hluav taws xob siab, uas muaj kev nyab xeeb siv *. Nws belongs rau tam sim no-tswj switching fais fab mov nrog qhib tso zis. Vim yog siv CMOS Circuit Court, lub zog siv ntawm lub cuab yeej txo qis.
(2) Tsuas muaj peb txoj hauv kev: tswj lub davhlau ya nyob twg C, qhov chaw S, ntws D, piv rau peb lub davhlau ya nyob twg linear regulator, tuaj yeem yog txoj hauv kev yooj yim tshaj plaws los tsim cov zaus transformer yam tsis muaj flyback hloov fais fab mov. Txhawm rau ua kom tiav ntau yam kev tswj hwm, kev tsis ncaj ncees thiab kev tiv thaiv kev ua haujlwm, C, D yog ntau txoj haujlwm pin tawm, paub txog tus pin ntau lub hom phiaj. Siv lub davhlau ya nyob twg tswj raws li piv txwv, nws muaj peb lub luag haujlwm: (1) qhov kawg ntawm qhov hluav taws xob VC rau cov khoom siv hluav taws xob sib txuas thiab lub rooj vag tsav theem kom muaj kev tsis ncaj ncees; (2) qhov kawg ntawm IC tam sim no tuaj yeem kho lub voj voog ua haujlwm; (3) qhov kawg ntawm lub hwj chim mov ceg Circuit Court thiab tsis siv neeg restart / compensating capacitor kev twb kev txuas taw tes, los ntawm sab nraud bypass capacitor los txiav txim qhov zaus ntawm tsis siv neeg rov pib dua thiab them nyiaj rau lub voj voog tswj.
(3) Qhov ntau ntawm input AC voltage yog qhov dav heev. Rau cov khoom siv hluav taws xob ruaj khov, 220V ± 15% AC tuaj yeem xaiv, thiab qhov siab tshaj plaws tso zis hluav taws xob yuav raug txo los ntawm 40% yog tias nws tau nruab nrog 85 ~ 265V dav AC. Lub input zaus ntau ntawm cov khoom siv hluav taws xob hloov pauv yog 47 ~ 440Hz.
(4) Tus nqi ntawm kev hloov zaus yog 100KHz, thiab lub luag haujlwm hloov pauv hloov pauv yog 1.7% ~ 67%. Kev ua tau zoo ntawm cov khoom siv hluav taws xob yog kwv yees li 80%, mus txog 90%, uas yog ze li ob npaug ntawm cov kab hluav taws xob sib xyaw ua ke tswj fais fab. Nws qhov kev khiav hauj lwm kub yog 0 txog 70 degree nti siab tshaj plaws kev sib tshuam kub Tjm=135 degree .
(5) TOPSwitch-II lub hauv paus ntsiab lus ntawm kev ua haujlwm yog siv cov lus qhia tam sim no IC los tswj lub luag haujlwm voj voog D, kom ua tiav lub hom phiaj ntawm kev tswj hluav taws xob. Piv txwv li, thaum cov zis hluav taws xob ntawm qhov hloov hluav taws xob hloov VOT vim qee qhov laj thawj, tom qab lub optocoupler tawm tswv yim Circuit Court yuav ua rau Ic↑→ yuam kev voltage Vrt → D↓ →Vo↓, kom Vo tseem tsis hloov. Thiab vice versa.
(6) yooj yim peripheral Circuit Court, tus nqi qis. Sab nraud tsuas yog yuav tsum tau txuas cov lim rectifier, high-frequency transformer, thawj tiv thaiv Circuit Court, tawm tswv yim Circuit Court thiab tso zis Circuit Court. Kev siv cov chips no tuaj yeem txo qhov cuam tshuam ntawm electromagnetic cuam tshuam los ntawm kev hloov hluav taws xob.
Ob hom kev khiav hauj lwm ntawm monolithic hloov fais fab mov
Monolithic switching fais fab mov muaj ob hom kev lag luam: ib qho yog hom txuas ntxiv CUM (ContinuousMode), lwm qhov tsis yog hom txuas ntxiv
(a) Nruam hom (b) Tsis siv neeg hom
DUM (DiscontinuousMode). Qhov hloov tam sim no waveforms ntawm ob hom no muaj nyob rau hauv daim duab (a) thiab Fig. (b), feem. Raws li tuaj yeem pom los ntawm daim duab, nyob rau hauv qhov txuas mus ntxiv, thawj qhov hloov pauv tam sim no pib los ntawm qee qhov amplitude, tom qab ntawd nce mus rau tus nqi siab tshaj plaws, thiab tom qab ntawd sai sai rov qab mus rau xoom. Nws hloov pauv tam sim no waveform yog trapezoidal. Qhov no qhia tau hais tias nyob rau hauv tas mus li hom, lub tom ntej switching voj voog muaj ib tug thawj lub zog vim hais tias lub zog khaws cia nyob rau hauv lub high-frequency transformer tsis yog tag nrho tso tawm nyob rau hauv txhua lub voj voog hloov. Kev siv cov hom txuas ntxiv txo cov thawj ncov tam sim no Ip thiab RMS tam sim no IRMS, txo cov hwj chim ntawm cov nti. Txawm li cas los xij, hom kev txuas mus ntxiv yuav tsum muaj kev nce ntxiv hauv thawj inductance Lp, uas ua rau muaj kev nce hauv qhov loj ntawm lub siab zaus transformer. Nyob rau hauv cov ntsiab lus, lub nruam hom yog haum rau qis zog TOPSwitches thiab loj loj loj zaus transformers.
Qhov hloov tam sim no nyob rau hauv hom tsis tu ncua nce ntawm xoom mus rau lub ncov thiab tom qab ntawd poob mus rau xoom. Qhov no txhais tau hais tias lub zog khaws cia nyob rau hauv high-frequency transformer yuav tsum tau tso tawm tag nrho thaum lub sij hawm hloov lub voj voog, thiab nws hloov tam sim no waveform yog daim duab peb sab. Hom tsis txuas ntxiv muaj qhov tseem ceeb ntawm Ip thiab IRMS, tab sis yuav tsum muaj Lp tsawg dua. Yog li ntawd, nws yog qhov tsim nyog rau kev siv TOPSwitch nrog lub zog tso zis ntau dua nrog qhov me me qhov siab zaus transformer.
