I. Khoom Tsim Cov qauv tsim ntawm LED qhov hluav taws xob tsis tu ncua tam sim no tsav lub hom phiaj los daws ob qhov teeb meem tseem ceeb: ua tiav qhov tsav tam sim no thiab txhim kho qhov muag pom kev ntawm LEDs. Lub hauv paus ntsiab lus ntawm lub topology feem ntau yog muab faib ua cais thiab tsis yog - hom cais, nyob ntawm seb puas muaj hluav taws xob cais tawm. Nyob ntawm cov ntawv thov tshwj xeeb, hom tso zis tuaj yeem txais qhov hluav taws xob tsis tu ncua (CV), tsis tu ncua tam sim no (CC), lossis tsis tu ncua tam sim no tsis tu ncua (CCCV).
Yuav kom ua tau raws li kev siv hluav taws xob zoo thiab cov qauv kev sib haum xeeb (xws li US Energy Star thiab EU IEC 61000-3-2 tus qauv), kev hloov kho fais fab (PFC) yuav tsum tau txiav txim siab hauv kev tsim. Cov thev naus laus zis muaj xws li passive PFC thiab nquag PFC. Thaum tshav kub kub dissipation tseem ceeb heev rau lifespan; Kev saib xyuas yuav tsum tau ua thaum tsim los xyuas kom meej tias LED tsav tsheb Circuit Court tsis nyob ze nrog lub tshav kub dissipation system. Feem ntau, aluminium substrate yog siv, thiab cov khoom siv hluav taws xob tau sib npaug. Rau cov ntawv thov hluav taws xob siab, cov kiv cua pab kuj tseem yuav tsum tau.
Hais txog kev nyab xeeb thiab kev tiv thaiv, cov khoom lag luam yuav tsum ua raws li cov cai tswj kev nyab xeeb thiab cov kev xav tau ntawm electromagnetic compatibility (EMC), thiab muaj overload, luv Circuit Court, overvoltage, thiab overtemperature tiv thaiv functions. Tsis tas li ntawd, kev tshaj tawm cov qauv tsim tam sim no tswj hwm thiab tswj kev ruaj ntseg ntawm cov ceg ntoo thiab lub voj voog tag nrho los ntawm kev tsim cov kev ywj pheej tsis tu ncua tam sim no ntawm txhua qhov chaw sib txuas, uas ua rau cov khoom lag luam siab ruaj khov thiab tsim tau yooj yim.
II. Core Technologies Kev tswj tsis tu ncua tam sim no feem ntau siv ob txoj hauv kev: thawj zaug yog kev tawm tswv yim tswj los ntawm kev sib piv, siv tus sib piv los txheeb xyuas LED tam sim no thiab ua tiav qhov kev tswj xyuas tam sim no los ntawm kev hloov PWM tso zis lub voj voog; Qhov thib ob yog kev tawm tswv yim tswj los ntawm A / D converters, siv A / D converter los kuaj xyuas LED tam sim no thiab ua tiav qhov kev tswj xyuas tam sim no los ntawm kev hloov PWM tso zis lub voj voog.
Distributed tas li tam sim no thev naus laus zis tsim kev ywj pheej tsis tu ncua tam sim no ntawm txhua ceg taw tes taw qhia los tswj, tswj, thiab tswj kev ruaj khov ntawm cov ceg ntoo thiab tag nrho lub voj voog. Cov cuab yeej no tawm tswv yim "qhov hluav taws xob tsis tu ncua ua ntej, tom qab ntawd tsis tu ncua," li no lub ntsiab lus ntawm "distributed tas li tam sim no technology." Software-raws li tus neeg tsav tsheb tam sim no tsis tu ncua qhov teeb tsa tseem ceeb suav nrog kev tsim cov ntawv sau npe hauv IC, teeb tsa cov zis tam sim no raws li txoj kev khaws cia siv hauv cov khoom siv tiag tiag, thiab ua tiav qhov kev teeb tsa tam sim no los ntawm kev sau ntawv digital ntawm microcomputer software.
Kev tshwm sim thiab thev naus laus zis ntawm kev mob siab rau ib zaug -theem APFC chips rau LED teeb pom kev zoo, xws li BP3102, BP3105, thiab BP3108 haum rau PSR cov phiaj xwm cais tawm, thiab BP3309 thiab BP3308 tsav tsheb chips ntawm BP33XX series rau ib leeg {{7.APFC} Lub ntsiab kom zoo dua ntawm ib qho -theem flyback fais fab kev kho LED tsav fais fab mov nrog FAN7527B raws li cov tub ntxhais yog nws lub zog loj (feem ntau ntau dua 0.95). Lub ntsiab AC fais fab mov ua ke nrog kev tswj hwm muaj xws li cov hauv qab no: thawj- sab tawm tswv yim fais fab mov, siab-lub zog hluav taws xob cais lub teeb pom kev zoo, tsis yog- cais LED tsav tsheb fais fab mov, thiab thyristor dimming tau tshaj fais fab mov.
