Tib-chip hloov fais fab mov nrog ob hom kev ua haujlwm
Ib-chip switching fais fab mov integrated circuit muaj qhov zoo ntawm kev sib koom ua ke, kev ua haujlwm siab, qhov yooj yim tshaj plaws peripheral circuit, qhov kev ua tau zoo tshaj plaws, thiab tuaj yeem tsim cov khoom siv hluav taws xob zoo sib cais hloov hluav taws xob yam tsis muaj hluav taws xob zaus transformer. Tom qab nws tawm hauv nruab nrab mus rau lig xyoo 1990, nws tau pom muaj zog heev. Tam sim no, nws tau dhau los ua qhov kev nyiam sib koom ua ke rau kev txhim kho cov khoom siv hluav taws xob nruab nrab thiab me me hloov hluav taws xob, kev hloov pauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob hauv ntiaj teb. Lub zog hloov hluav taws xob tsim los ntawm nws yog sib npaug ntawm tus nqi rau cov kab hluav taws xob tswj hluav taws xob ntawm tib lub zog, thaum lub zog ntawm cov khoom siv hluav taws xob tau zoo dua qub, thiab qhov ntim thiab qhov hnyav tau txo qis heev. Qhov no tau 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 suav nrog oscillator, yuam kev amplifier, mem tes dav modulator, rooj vag Circuit Court, high voltage fais fab hloov raj (MOSFET), bias Circuit Court, overcurrent tiv thaiv Circuit Court, overheat tiv thaiv thiab lub hwj chim-on reset circuit, kaw / pib-restart circuit . Nws siv lub high-frequency transformer kom cais tawm tag nrho cov zis davhlau ya nyob twg los ntawm daim phiaj, uas muaj kev nyab xeeb thiab txhim khu kev qha. Nws yog tam sim no-tswj switching fais fab mov nrog qhib-drain output. Vim yog siv CMOS circuits, lub zog siv ntawm lub cuab yeej txo qis.
(2) Tsuas muaj peb lub terminals: tswj davhlau ya nyob twg C, qhov chaw S, thiab ntws D, uas yog piv rau peb-terminal linear regulators thiab muaj peev xwm tsim ib tug flyback switching fais fab mov yam tsis muaj lub hwj chim zaus transformer nyob rau hauv txoj kev yooj yim tshaj. Txhawm rau ua kom tiav ntau yam kev tswj hwm, kev tsis ncaj ncees thiab kev tiv thaiv kev ua haujlwm, C thiab D yog cov khoom siv ntau yam, paub txog ib tus pin nrog ntau lub zog. Siv lub davhlau ya nyob twg tswj raws li piv txwv, nws muaj peb lub luag haujlwm: ①Qhov voltage VC ntawm lub davhlau ya nyob twg no muab kev tsis ncaj ncees rau lub on-chip shunt regulator thiab lub rooj vag tsav tsheb theem; ② IC tam sim no ntawm lub davhlau ya nyob twg tuaj yeem kho lub luag haujlwm lub voj voog; ③ Lub davhlau ya nyob twg no kuj tseem siv los ua lub zog hluav taws xob Cov ntsiab lus txuas nrog lub tshuab hluav taws xob tsis siv neeg rov pib dua / nyiaj npib capacitor, zaus ntawm kev pib rov pib tsis siv neeg yog txiav txim siab los ntawm lwm tus bypass capacitor, thiab lub voj tswj tau them.
(3) Qhov ntau ntawm input AC voltage yog qhov dav heev. 220V ± 15%. Lub input zaus ntau ntawm cov khoom siv hluav taws xob hloov pauv yog 47 ~ 440Hz.
(4) Tus nqi raug hloov pauv zaus yog 100KHz, thiab qhov kev hloov pauv ntawm lub luag haujlwm piv yog 1.7 feem pua rau 67 feem pua. Lub zog muab hluav taws xob yog kwv yees li 80 feem pua, mus txog 90 feem pua, uas yog ze li ob npaug ntawm cov kab hluav taws xob sib xyaw ua ke tswj fais fab. Nws qhov ntsuas kub ua haujlwm yog 0-70 degree Qhov siab tshaj qhov sib txuas ntawm lub nti yog Tjm =135 degree .
(5) Lub hauv paus ntsiab lus ua haujlwm ntawm TOPSwitch-II yog siv cov lus tawm tswv yim tam sim no IC los kho lub luag haujlwm piv D kom ua tiav lub hom phiaj ntawm kev tswj hluav taws xob. Piv txwv li, thaum qhov tso zis voltage VOT ntawm kev hloov hluav taws xob yog tshwm sim los ntawm qee qhov laj thawj, optocoupler tawm tswv yim Circuit Court yuav ua rau Ic↑ → yuam kev voltage Vrt → D↓ → Vo↓, kom Vo tseem tsis hloov. rov qab.
(6) Lub peripheral Circuit Court yog qhov yooj yim thiab tus nqi qis. Externally tsuas yog yuav tsum tau txuas rectification lim, siab zaus transformer, thawj tiv thaiv Circuit Court, tawm tswv yim Circuit Court thiab tso zis Circuit Court. Kev siv cov chips zoo li no tuaj yeem txo qhov cuam tshuam ntawm electromagnetic cuam tshuam los ntawm kev hloov cov khoom siv hluav taws xob.
Ob hom kev ua haujlwm ntawm monolithic hloov fais fab mov
Lub monolithic switching fais fab mov muaj ob hom kev ua haujlwm yooj yim: ib qho yog hom txuas mus ntxiv CUM (ContinuousMode), thiab lwm yam yog hom tsis tu ncua
Qhov hloov pauv tam sim no waveforms ntawm ob hom hauv daim duab.
(a) hom tsis tu ncua (b) hom tsis tu ncua
DUM (Discontinuous Mode). Qhov hloov pauv tam sim no waveforms ntawm ob hom no muaj nyob rau hauv daim duab (a) thiab daim duab (b) feem. Nws tuaj yeem pom los ntawm daim duab uas nyob rau hauv kev 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, thiab tom qab ntawd 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, txij li thaum lub zog khaws cia nyob rau hauv lub high-frequency transformer yog tsis tag nrho tso tawm nyob rau hauv txhua lub voj voog hloov, lub voj voog hloov tom ntej muaj lub zog pib. Kev siv hom txuas mus ntxiv tuaj yeem txo qhov tseem ceeb tshaj plaws tam sim no Ip thiab qhov txiaj ntsig zoo tam sim no IRMS, thiab txo qis kev siv lub zog ntawm cov nti. Txawm li cas los xij, hom kev txuas mus ntxiv yuav tsum muaj qhov nce hauv thawj inductance Lp, uas yuav ua rau muaj kev nce hauv qhov loj ntawm lub tshuab hluav taws xob ntau zaus. Txhawm rau ua kom tiav, hom txuas ntxiv yog tsim rau TOPSwitch nrog lub zog me me thiab lub tshuab hluav taws xob ntau zaus nrog qhov loj me.
Qhov hloov tam sim no hauv hom tsis txuas ntxiv nce ntawm xoom mus rau qhov siab tshaj tus nqi thiab tom qab ntawd poob rau xoom. Qhov no txhais tau hais tias lub zog khaws cia rau hauv high-frequency transformer yuav tsum tau tso tawm tag nrho hauv txhua lub voj voog hloov, thiab nws qhov hloov pauv tam sim no waveform yog daim duab peb sab. Qhov Ip thiab IRMS qhov tseem ceeb hauv hom tsis txuas ntxiv yog qhov loj dua, tab sis qhov xav tau Lp yog me dua. Yog li ntawd, nws yog qhov tsim nyog rau kev siv TOPSwitch nrog lub zog tso zis ntau dua thiab sib piv cov hloov hluav taws xob ntau zaus nrog me me.
