Muaj ntau ntau yam ntawm LED cov khoom siv hluav taws xob, tab sis lawv cov yam ntxwv zoo ib yam yog tias lawv yuav tsum siv lub zog hluav taws xob DC thiab lub zog ua haujlwm qis ntawm ib qho khoom siv, thiab kev hloov pauv yuav tsum tau siv thaum siv lub zog hauv nroog.Rau kev siv sib txawv, muaj cov kev daws teeb meem sib txawv hauv kev paub txog ntawm LED lub zog hloov pauv.

Raws li cov khoom siv hluav taws xob hluav taws xob, LED tsav tsheb tuaj yeem muab faib ua peb pawg: ib qho yog roj teeb-powered, feem ntau yog siv rau cov khoom siv hluav taws xob portable, tsav tsheb qis thiab nruab nrab-lub zog dawb LEDs;Lwm qhov yog lub zog hluav taws xob ntau dua 5, uas yog siv los ntawm lub zog ruaj khov lossis lub roj teeb Lub zog, xws li cov kauj ruam-down, kauj ruam-down thiab kauj ruam-down DC converters (converters; qhov thib peb yog ncaj qha powered los ntawm mains (110V los yog 220V) los yog sib xws high-voltage direct tam sim no (xws li 40 ~ 400V), uas yog tsuas yog siv rau cov ntxhuav siab zog Dawb LED, xws li step-down DC / DC converter.

1. Lub tswv yim tsav tsheb roj teeb

Lub roj teeb muab hluav taws xob feem ntau yog 0.8 ~ 1.65V.Rau cov khoom siv hluav taws xob qis xws li cov khoom siv LED, qhov no yog ib qho kev siv ntau.Cov qauv no feem ntau yog tsim rau cov khoom siv hluav taws xob uas siv tau los tsav lub zog qis thiab nruab nrab lub zog dawb LEDs, xws li LED teeb nyem, LED teeb thaum muaj xwm ceev, lub teeb txuag hluav taws xob, thiab lwm yam. Xav txog tias nws tuaj yeem ua haujlwm nrog AA roj teeb thiab muaj qhov ntim tsawg tshaj plaws, qhov kev daws teeb meem zoo tshaj plaws yog lub zog twj tso kua mis boost converter, xws li boost DC Zhuang (converter lossis boost (los yog ob peb ntawm cov nqi twj tso kua mis converters ntawm buck-boost hom yog cov tsav tsheb uas siv LDO circuits.

2. High voltage thiab qhuav txoj kev tsav tsheb

Cov txheej txheem hluav taws xob qis qis nrog qhov hluav taws xob siab dua 5 siv lub zog ruaj khov los yog roj teeb los muab lub zog.Tus nqi hluav taws xob ntawm LED fais fab mov yog ib txwm siab dua li LED tube voltage poob, uas yog, nws yog ib txwm siab dua 5V, xws li 6V, 9V, 12V, 24V lossis siab dua.Nyob rau hauv cov ntaub ntawv no, nws yog tsuas yog powered los ntawm ib tug stabilized fais fab mov los yog lub roj teeb los tsav lub LED teeb.Hom kev siv hluav taws xob zoo li no yuav tsum daws qhov teeb meem ntawm lub hwj chim mov kauj ruam-down.Cov ntawv thov muaj xws li hnub ci lawn teeb, hnub ci vaj teeb, thiab lub tsheb teeb pom kev zoo.

3. Lub tswv yim tsav tsheb ncaj qha los ntawm cov khoom siv hluav taws xob lossis cov hluav taws xob hluav taws xob siab

Cov tshuaj no yog siv ncaj qha los ntawm lub mains (100V los yog 220V) los yog cov high-voltage direct tam sim no, thiab yog siv los tsav high-power dawb LED teeb.Mains tsav yog ib txoj kev siv hluav taws xob nrog tus nqi siab tshaj plaws ntawm LED zaub, thiab nws yog txoj kev loj hlob ntawm kev nrov thiab kev siv ntawm LED teeb pom kev zoo.

Thaum siv lub zog hluav taws xob los tsav lub LED, nws yog ib qho tsim nyog los daws qhov teeb meem ntawm kev txo qis thiab kev hloov kho, tab sis kuj yuav tsum muaj kev hloov pauv siab, qhov ntim me me thiab tus nqi qis dua.Tsis tas li ntawd, qhov teeb meem ntawm kev sib cais kev ruaj ntseg yuav tsum tau daws.Txhawm rau txiav txim siab qhov cuam tshuam ntawm daim phiaj hluav taws xob, qhov cuam tshuam ntawm electromagnetic cuam tshuam thiab cov teeb meem ntawm lub zog yuav tsum tau daws.Rau nruab nrab thiab qis zog LEDs, qhov zoo tshaj plaws Circuit Court qauv yog ib qho kev sib cais ib leeg-kawg flyback converter.Rau kev siv hluav taws xob siab, kev hloov hluav taws xob txuas txuas txuas yuav tsum tau siv.

Rau LED tsav tsheb, qhov kev sib tw tseem ceeb yog qhov tsis yog-linearity ntawm LED zaub.Qhov no feem ntau yog tshwm sim nyob rau hauv qhov tseeb hais tias lub pem hauv ntej voltage ntawm lub LED yuav hloov nrog tam sim no thiab kub, lub pem hauv ntej voltage ntawm txawv LED li yuav txawv, lub "xim point" ntawm lub LED yuav drift nrog rau tam sim no thiab kub, thiab cov LED yuav tsum nyob rau hauv qhov yuav tsum tau ntawm cov specification.Ua haujlwm nyob rau hauv ntau yam kom ua tiav txoj haujlwm txhim khu kev qha.Lub luag haujlwm tseem ceeb ntawm tus tsav tsheb LED yog txhawm rau txwv qhov tam sim no nyob rau hauv kev ua haujlwm, tsis hais txog kev hloov pauv ntawm cov khoom siv nkag thiab qhov hluav taws xob xa mus.

Rau LED tsav Circuit Court, ntxiv rau qhov kev ruaj ntseg tam sim no, muaj lwm yam tseem ceeb.Piv txwv li, yog tias koj xav tau ua LED dimming, koj yuav tsum muab PWM thev naus laus zis, thiab PWM zaus zaus rau LED dimming yog 1 ~ 3kHz.Tsis tas li ntawd, lub zog tuav lub peev xwm ntawm LED tsav Circuit Court yuav tsum txaus, muaj zog, muaj peev xwm tiv taus ntau yam kev txhaum, thiab yooj yim rau kev siv.Nws yog tsim nyog hais tias vim hais tias LED yog ib txwm nyob ntawm qhov zoo tshaj plaws tam sim no thiab yuav tsis drift.

Nyob rau hauv kev xaiv ntawm LED zaub tsav schemes, qhov inductance boost DC / DC tau txiav txim siab yav dhau los.Nyob rau hauv xyoo tas los no, tam sim no uas tus nqi twj tso kua mis tsav tsheb tso zis tau nce los ntawm ob peb puas mA mus rau 1.2A.Yog li ntawd, ob qho no Cov zis ntawm hom actuator zoo ib yam.