電源適配器和LED驅動電源沒有明顯規模界限
電(dian)源(yuan)(yuan)(yuan)(yuan)適配(pei)器咱們一般是指(zhi)屬于穩壓(ya)(ya)的(de)電(dian)源(yuan)(yuan)(yuan)(yuan),咱們常講的(de)LED驅動電(dian)源(yuan)(yuan)(yuan)(yuan)一般是指(zhi)恒流電(dian)源(yuan)(yuan)(yuan)(yuan)也(ye)稱之(zhi)為(wei)恒流源(yuan)(yuan)(yuan)(yuan),但也(ye)有LED是用穩壓(ya)(ya)電(dian)源(yuan)(yuan)(yuan)(yuan)如電(dian)源(yuan)(yuan)(yuan)(yuan)適配(pei)器來供電(dian)的(de).
首先咱們(men)來分析下(xia)LED驅(qu)動(dong)方法它分為恒流(liu)電源驅(qu)動(dong)和穩壓(ya)電源驅(qu)動(dong).
恒(heng)流(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)驅動(dong)是(shi)指運(yun)用恒(heng)流(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)為LED供電(dian)(dian)(dian),恒(heng)流(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)輸(shu)出(chu)的(de)電(dian)(dian)(dian)流(liu)(liu)(liu)是(shi)恒(heng)定的(de),而輸(shu)出(chu)的(de)直流(liu)(liu)(liu)電(dian)(dian)(dian)壓會(hui)跟著負(fu)載阻值的(de)改(gai)變(bian)(bian)在(zai)必(bi)定規模(mo)內改(gai)變(bian)(bian),負(fu)載阻值小,輸(shu)出(chu)電(dian)(dian)(dian)壓就低,負(fu)載阻值越(yue)大(da),輸(shu)出(chu)電(dian)(dian)(dian)壓也就越(yue)高(gao).恒(heng)流(liu)(liu)(liu)電(dian)(dian)(dian)源(yuan)所承(cheng)載的(de)LED功率是(shi)固定的(de),如10W的(de)LED燈(deng)便是(shi)運(yun)用10W的(de)恒(heng)流(liu)(liu)(liu)源(yuan),在(zai)LED燈(deng)節能以及LED發光亮(liang)度均衡方面而言恒(heng)流(liu)(liu)(liu)源(yuan)驅動(dong)LED燈(deng)它(ta)是(shi)最(zui)理想(xiang)的(de)方法.
穩(wen)(wen)(wen)(wen)壓(ya)(ya)電源驅動是(shi)(shi)指運(yun)用穩(wen)(wen)(wen)(wen)壓(ya)(ya)電源(如電源適(shi)(shi)配器(qi))為(wei)LED供電,穩(wen)(wen)(wen)(wen)壓(ya)(ya)電源是(shi)(shi)指當各項參數(shu)確認后,輸出的電壓(ya)(ya)在(zai)(zai)一個規(gui)模內(nei)是(shi)(shi)固定的,而輸出的電流卻(que)隨著(zhu)負載的巨(ju)細而改(gai)變.以(yi)穩(wen)(wen)(wen)(wen)壓(ya)(ya)驅動電源驅動LED,每串(chuan)(chuan)需求加上適(shi)(shi)宜的電阻(zu)才可使每串(chuan)(chuan)LED顯現亮度平均,如電阻(zu)或每串(chuan)(chuan)LED燈(deng)珠(zhu)中有LED燈(deng)珠(zhu)發生電流改(gai)變時會發生亮度改(gai)變,常(chang)常(chang)運(yun)用多(duo)(duo)燈(deng)珠(zhu)的情(qing)(qing)況下運(yun)用穩(wen)(wen)(wen)(wen)壓(ya)(ya)電源驅動比較(jiao)少由于在(zai)(zai)燈(deng)串(chuan)(chuan)越多(duo)(duo)情(qing)(qing)況下加上的電阻(zu)也(ye)就越多(duo)(duo),那也(ye)就會損耗(hao)更(geng)多(duo)(duo)的額定的電流.在(zai)(zai)燈(deng)珠(zhu)數(shu)量(liang)不(bu)是(shi)(shi)很多(duo)(duo)的情(qing)(qing)況下的運(yun)用得比較(jiao)多(duo)(duo).
電(dian)源適配器(qi)和(he)LED驅(qu)(qu)動(dong)(dong)(dong)電(dian)源沒(mei)有明顯(xian)規模界限,LED驅(qu)(qu)動(dong)(dong)(dong)電(dian)源區別在(zai)于LED燈珠(zhu)是(shi)穩壓驅(qu)(qu)動(dong)(dong)(dong)還是(shi)恒流驅(qu)(qu)動(dong)(dong)(dong).
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