Cov teeb meem uas tab tom ntsib teeb pom kev zoo Cov tuam tsev txoj kev zawm ntawm cov tswj thiab cov neeg tau txais kev pabcuam tau ua cov qauv tsim qauv tshiab niaj hnub no. Cov hnub qub zog thiab European Commission, ntawm lwm tus neeg, muaj kev txhawj xeeb tsis tsuas yog siv zog ntawm cov khoom siv hluav taws xob, nrog rau teeb pom kev zoo, tab sis kuj los ntawm lawv lub hwj chim siab zog, uas yog ib qho tseem ceeb ntawm kev siv zog tau ntev. Raws li cov teeb pom kev ntse, qhov teeb meem no yuav ua rau lo lus nyuaj zog, vim tias lub hwj chim yuav tsum "nyob rau hauv" los tshawb nrhiav qhov teeb meem ntawm cov maub los, yog li ntawd nws tseem nqus hnub qub.
Tam sim no, Energy Star cov kev cai tso cai rau lub hwjchim ntawm 0.5W, tabsis California Energy Commission (CEC) thiab lwm lub koomhaum tau npaj txo tus xov tooj no mus rau 0.2W los ntawm 2019, uas yuav ntxiv qhov kev twv ntxiv. Nrog lub teeb pom kev zoo los ntawm lub teeb pom kev zoo mus rau lub tshuab technology, dimming tau hloov.
Ntau txoj kev sib tsuam cov dav hlau-dav hlau (PWM) mas maj mam hloov qhov yooj yim resistors los yog triac dimming, uas yuav tsum tau cov neeg tsim qauv los txais cov kev sib txawv. LEDs yog ib lub tshuab tsis tshua muaj hluav taws xob, uas txhais tau hais tias lawv tsis tuaj yeem tsav ncaj qha los ntawm cov caws qaub ncaug, tab sis yuav tsum muaj lub hwjchim uas siv qhov hluav taws xob (CV) lossis qhov tam sim no (CC) raws li daim ntawv thov LED.
Lub hwj huam muaj kev cuam tshuam rau tag nrho cov kev ua tau zoo thiab kev siv zog ntawm cov teeb pom kev zoo, yog li nws yuav tsum tau muaj kev nyuab siab xyuas, tsawg kawg yog coj nws tus kheej. Muaj ntau ntau hom kev teeb pom kev muaj nyob rau hauv kev ua lag luam, xws li nyob rau hauv lub hwj chim los ntawm ntau lub watts mus txog pua pua watts. Yog li no, tsav lub zog mov yog tsim los ntawm ntau txoj hau kev.
Ntawm qis fais fab (feem ntau tsawg dua 10W), ib theem zuj zus ntawm ib theem zuj zus yog qhov kev nyiam tshaj plaws.
Txij li thaum daim ntawv thov ntawm cov khoom siv sib txawv ntawm lub cev-lub xeev qhov kev lag luam yog ntau thiab ntau dua, vim li ntawd, LED thiab qhov sib txuas ntawm qhov chaw muaj hluav taws xob los kuj tseem tsawg dua thiab tsawg zog, uas txhais tau hais tias kev ua haujlwm tseem ceeb heev, yog li ntawd cov khoom hluav taws xob tsis zoo tuaj yeem raug qis dua , thiab tuaj yeem ua qhov chaw me me thiab feem ntau qhov chaw airtight nruab thiab khiav lub teeb pom kev zoo nti tawm. Ib qho tseem ceeb rau txoj kev loj hlob sai ntawm cov teeb pom kev zoo hauv LED yog qhov poob ntawm LED nws tus kheej cov nqi.
Yog li, cov neeg nruab nrab thiab cov neeg tau txais kev pab tsis tsuas xav tau lub hwj huam hluav taws xob lub zog kom ua tau zoo dua nyob rau hauv cov chaw me, tab sis kuj yuav pom tias zoo li cov nqi txiav (uas txhais tau hais tias cov neeg tsim qauv yuav tsum txo cov xov tooj ntawm cov cheebtsam thiab txo txhua yam nqi BOM).
Teeb Nruab Nruab Nruab Nruab Nruab Nruab Nruab Nruab Nruab Nruab Nres Teeb pom kev zoo nyob rau hauv 25w-100w ntau yam thiab muaj feem xyuam rau cov chaw ua hauj lwm, cov tsev lag luam thiab qhov chaw nyob yog ib qho ntawm cov lag luam pheej loj tshaj plaws, nrog ob txoj kab ua ke yog cov kev daws teeb meem.
Nyob rau hauv ntau daim ntawv sau npe, lub zog hluav taws xob Fais Fab Corrector (PFC) siv thiab muaj kev sib tsoo nrog lub thoob-thoob converter. Qhov no yog tshwj xeeb tshaj yog haum rau kev daws ntawm dimming yuav tsum tau.
Nws kuj ua tau yooj yim tua LEDs hauv hom kev qeeb thiab ua kom tswj tau ntau yam coj cov hlua rau ntau txoj kev teeb pom kev zoo.
Anson Semiconductor tsis ntev los no tau muab kev daws teeb meem rau hom kev ua ntawv uas siv tau ob qho IC khoom thiab tsawg tus sab nrauv ntawm sab nrauv tsim los tsim kev ua haujlwm kom pom kev zoo.
FL7740 yog ib qho CV primary-end-regulation (PSR) xws li kev kho kom haum rau CV ( ± 3%) nrog rau kev khiav dejnum (nrog rau lub sijhawm ua haujlwm ceev), thiab txo tau cov kev sib tshuam thiab kev yau tshaj los ntawm cov kab thiab cov khoom thauj mus los kom tsawg dua 10% ntawm qhov tso tawm qhov hluav taws xob. Tus maub los txhawb kev dav dav dav AC ntau txog 80V AC mus rau 382V AC, thiab tsim nyog rau kev siv fais fab tuag nyob thoob plaws lub ntiaj teb. Nws xa tuaj rau 100W ntawm lub hwj chim, thaum nyob hauv kev npaj siab hom zog fais fab yog 0.15w - yooj yim tshaj li tag nrho cov cai.
Nws tseem siv ua qhov "khau khiab pob" uas yog qhov tseemceeb rau kev daws teebmeem. PFC built-in muaj peev xwm ncav cuag "0.9" ntawm tag nrho cov load, thiab THD "10%." Nyob rau hauv cov ntaub ntawv ntawm ib nrab load, tus yeem PF Optimizer siv, thaum tus nqi ntawm 0.9 pf seem unchanged.
Qhov no ua kom qhov teeb meem nkag siab tau khaws cia rau theem tsawg kawg hauv cov kab dav dav, uas tso cai rau FL7740 siv dav.
Qhov kev lag luam no muaj xws li cov kab kev tiv thaiv zoo rau kev lag luam zoo ntawm lub teeb ci ntsa iab: kev tiv thaiv kev tiv thaiv, kev tawm ntawm cov hluav taws xob tiv thaiv kab nrib, kev tiv thaiv kev luv luv / qhib kev tiv thaiv, thiab VDD thiab tshaj dhau kev tiv thaiv kev tiv thaiv. The FL7760 Buck ("Buck") tswj, uas khiav hauv hom txwm tam sim no (CCM), muaj kev hloov dua siab tshiab.
Cov cuab yeej muaj peev xwm ua hauj lwm nyob rau hauv ntau ntawm 8V mus rau 60V dav voltage input, thiab txhawb thoob plaws analog thiab PWM dimming, thiab lub hwj huam tau tsuas yog 150 μ a. Qhov tseem ceeb, FL7760 PWM dimming tau npog tag nrho cov khoom tso tawm ntawm 1-100%, tab sis qee lub caij ua hauj lwm, vim kev khiav hauj lwm zaus ntawm PWM, yuav tshwm sim tsis tshua meej thiab hnov suab nrov. Analog dimming range yog 5-100%, piv nrog rau tam sim no 15-100%, qhov no yog qhov kev txhim kho ntawm cov tshuab uas twb muaj lawm.
Feem ntau, analog dimming yog favored vim tias nws tsis muaj qhov PWM flaw, thiab FL7760 ua nws qhov kev xaiv thawj.
Ib qho tseem ceeb ntawm dimming zoo uas yog hauv qab analog qhov chaw ntawm 5% yog tias FL7760 tau muab cov analog thiab PWM los muab ib qho kev sib xyaw ntawm dimming, tsis txuam nrog ntawm ob txoj kev los muab ntau yam kev ua haujlwm tsis muaj qhov tsis muaj lub neej stroboscopic thiab teeb meem suab nrov.
Zoo li FL7740, FL7760 muaj ntau yam kev tiv thaiv, nrog rau kev thermal shutdown thiab kev tiv thaiv overcurrent.
Sau ua ke
Cov teeb pom kev zoo dua yog nce nrog nws cov kev siv hluav taws xob qis, kev siv ntau yam, thiab kev sib haum xeeb nrog cov teeb pom kev zoo, cov qauv tsim kom cov neeg ua haujlwm nce rau qhov kev ua tau zoo, tshwj xeeb tshaj yog rau cov uas tsis muaj zog txaus thiab muaj peev xwm los muab ntau hom kev ua kom tsis muaj zog. Cov khoom nruab nrab ntawm semiconductor xws li fl7740 / fl7760 ua ke ntawm semiconductors ua tau raws li cov kev cov nyom ntawm kev ua tau zoo thiab muab ib qho kev daws teeb meem, tsis tshua muaj pes tsawg tus uas xa cov teeb pom kev zoo tshaj plaws ntawm cov hluav taws xob ntawm cov nqi sib tw.
