大家好我是(shi)小(xiao)編沁(qin)(qin)夢今天(tian)我們來介紹LED燈(deng)珠電(dian)壓(ya)(ya)(ya)降 led燈(deng)電(dian)壓(ya)(ya)(ya)高怎(zen)么(me)降電(dian)壓(ya)(ya)(ya)的問(wen)題(ti)，以下就是(shi)沁(qin)(qin)夢對此(ci)問(wen)題(ti)和相關問(wen)題(ti)的歸納整理,一起來看(kan)看(kan)吧(ba)。

文章目錄導航:

• 1、led燈珠熱后不亮電壓降低一半涼后在亮什么原因
• 2、led燈的電壓是怎樣降低的
• 3、led點亮后壓降多少
• 4、1wled燈珠配多大電阻
• 5、led燈壓降和導通電壓一樣嗎

led燈珠熱后不亮電壓降低一半涼后在亮什么原因

應該(gai)是有三種(zhong)可能，第一種(zhong)是因(yin)為電壓降低后(hou)，驅(qu)動的(de)輸出電流也降低了(le)，（同時燈珠(zhu)(zhu)(zhu)亮(liang)(liang)度降低了(le)）也導(dao)(dao)致燈珠(zhu)(zhu)(zhu)VF值（即(ji)燈珠(zhu)(zhu)(zhu)的(de)驅(qu)動電壓）降低了(le)，所以燈珠(zhu)(zhu)(zhu)會被點(dian)亮(liang)(liang)第二種(zhong)就是燈珠(zhu)(zhu)(zhu)已經損傷(shang)，點(dian)亮(liang)(liang)一段時間后(hou)因(yin)熱脹(zhang)冷縮(suo)，導(dao)(dao)致燈珠(zhu)(zhu)(zhu)里的(de)金線斷(duan)開（膠體有張力(li)），冷卻后(hou)又接通。

第三種就是驅(qu)動(dong)的原因了，受熱后驅(qu)動(dong)異常而無(wu)法工(gong)作，冷(leng)卻或降低電壓后又(you)能使用。

led燈的電壓是怎樣降低的

lED燈的(de)電(dian)(dian)壓，是由220伏(fu)的(de)市電(dian)(dian)，通過二極管(guan)的(de)整流(liu)，電(dian)(dian)解電(dian)(dian)容的(de)濾波變成了脈(mo)動直流(liu)，再經過阻(zu)容降(jiang)壓及整流(liu)輸出了ⅠED燈所需要(yao)的(de)電(dian)(dian)壓。

led點亮后壓降多少

Led燈珠(zhu)(zhu)是(shi)半(ban)導(dao)體(ti)材料(liao)，類似半(ban)導(dao)體(ti)發光二極管。它(ta)有個正向導(dao)通(tong)(tong)電(dian)(dian)壓，有個額(e)定(ding)工作電(dian)(dian)流。只要達到它(ta)的(de)導(dao)通(tong)(tong)電(dian)(dian)壓就(jiu)(jiu)可工作，通(tong)(tong)過的(de)電(dian)(dian)流大小(xiao)(xiao)決定(ding)了(le)燈珠(zhu)(zhu)的(de)亮(liang)度。工作時的(de)所謂(wei)壓降就(jiu)(jiu)是(shi)其導(dao)通(tong)(tong)電(dian)(dian)壓。Led燈珠(zhu)(zhu)品種規格型號繁多，各不相同。通(tong)(tong)過的(de)工作電(dian)(dian)流大小(xiao)(xiao)(亮(liang)度大小(xiao)(xiao))并(bing)不改變燈珠(zhu)(zhu)的(de)"壓降"。

1wled燈珠配多大電阻

照(zhao)明用(yong)1W的(de)(de)LED燈珠電壓(ya)降一般是3.15V3.4V，按(an)3.3V計算(suan)，電流350mA。電阻(zu)上的(de)(de)壓(ya)降就是12V-3.3V=8.7V，電阻(zu)R=U/I=8.7/0.35=24.85Ω,為了延長燈珠壽命，可(ke)以選(xuan)擇(ze)27Ω電阻(zu)（當(dang)然你(ni)也可(ke)以選(xuan)擇(ze)24Ω電阻(zu)），電阻(zu)的(de)(de)功率P=UI=8.7*0.35=3.05W，選(xuan)擇(ze)3W電阻(zu)即可(ke)。

led燈壓降和導通電壓一樣嗎

led燈壓(ya)(ya)降(jiang)(jiang)和導(dao)(dao)通(tong)(tong)(tong)(tong)電(dian)壓(ya)(ya)是不(bu)一(yi)樣(yang)(yang)的(de)，這(zhe)是兩個完(wan)全(quan)不(bu)同(tong)的(de)概念(nian).首先(xian)LED燈的(de)電(dian)壓(ya)(ya)降(jiang)(jiang)是指當LED燈點亮時(shi)LED燈兩端的(de)電(dian)壓(ya)(ya)降(jiang)(jiang),通(tong)(tong)(tong)(tong)常也可稱為LED的(de)導(dao)(dao)通(tong)(tong)(tong)(tong)壓(ya)(ya)降(jiang)(jiang).而LED的(de)導(dao)(dao)通(tong)(tong)(tong)(tong)電(dian)壓(ya)(ya)指的(de)是LED導(dao)(dao)通(tong)(tong)(tong)(tong)所(suo)需要的(de)電(dian)壓(ya)(ya),由此(ci)可見,LED燈壓(ya)(ya)降(jiang)(jiang)和導(dao)(dao)通(tong)(tong)(tong)(tong)電(dian)壓(ya)(ya)是完(wan)全(quan)不(bu)一(yi)樣(yang)(yang)的(de).通(tong)(tong)(tong)(tong)常LED的(de)導(dao)(dao)通(tong)(tong)(tong)(tong)電(dian)壓(ya)(ya)要高于導(dao)(dao)通(tong)(tong)(tong)(tong)壓(ya)(ya)降(jiang)(jiang).

以(yi)上(shang)就(jiu)是天成小編(bian)對于LED燈珠電(dian)(dian)壓降(jiang)(jiang) led燈電(dian)(dian)壓高怎么降(jiang)(jiang)電(dian)(dian)壓問題(ti)和相關問題(ti)的解答了(le)，希(xi)望(wang)對你有用 【責任編(bian)輯：沁夢】