一、電源板是什么
電源板,顧名思義就是一種處理電源的主板。電源板在很多的電子產品里面都會使用到,包括我們的電腦、手(shou)機以(yi)及平板(ban)(ban)電(dian)(dian)(dian)腦(nao)等等都會使用(yong)到電(dian)(dian)(dian)源(yuan)(yuan)板(ban)(ban)。電(dian)(dian)(dian)源(yuan)(yuan)板(ban)(ban)對于電(dian)(dian)(dian)子產品是(shi)非常重要的(de),所以(yi)市(shi)場上也有(you)很多品牌的(de)電(dian)(dian)(dian)源(yuan)(yuan)板(ban)(ban),他(ta)們有(you)好有(you)壞,需要我們在購買的(de)時候仔細辨別。
二、電源板工作原理是什么
1、通電后(hou)副電源首先(xian)啟動工作,為(wei)主電路板(ban)微(wei)處理器控(kong)制系統提(ti)供正5伏的工作電壓。
2、開機后,副電(dian)源為PFC功率(lv)因數校(xiao)正電(dian)路驅(qu)動(dong)控制電(dian)路UCC28051、主(zhu)(zhu)開關電(dian)源驅(qu)動(dong)巨制電(dian)路DLA001的提供 VCC—ON供電(dian),主(zhu)(zhu)開關電(dian)源啟動(dong)工作,向主(zhu)(zhu)電(dian)路板(ban)負載(zai)電(dian)路提供正24伏和正12伏兩種電(dian)壓(ya)。
3、經過抗干擾(rao)(rao)電(dian)(dian)(dian)路(lu)濾除市電(dian)(dian)(dian)中的(de)雜波干擾(rao)(rao),整流(liu)、PFC電(dian)(dian)(dian)感、濾波輸出(chu)300V直流(liu)電(dian)(dian)(dian)壓(ya)到副(fu)電(dian)(dian)(dian)源電(dian)(dian)(dian)路(lu),副(fu)電(dian)(dian)(dian)源開始工作輸出(chu)+5v電(dian)(dian)(dian)壓(ya)。
4、經(jing)電(dian)(dian)源板輸(shu)出(chu)排插端口1腳到(dao)數(shu)字板CPU電(dian)(dian)路,CPU電(dian)(dian)路經(jing)過(guo)讀取數(shu)據開機輸(shu)出(chu)高電(dian)(dian)平開機電(dian)(dian)壓(ya)。
5、經電(dian)源(yuan)板排插端(duan)口2腳(jiao)到(dao)(dao)電(dian)源(yuan)板穩壓開(kai)關(guan)(guan)機控制電(dian)路(lu)(lu),開(kai)關(guan)(guan)機控制電(dian)路(lu)(lu)工(gong)(gong)作,輸出(chu)電(dian)壓到(dao)(dao)PFC振蕩電(dian)路(lu)(lu),輸出(chu)高頻方渡脈沖推(tui)動(dong)PFC開(kai)關(guan)(guan)管工(gong)(gong)作,利用PFC電(dian)感(gan)產(chan)生(sheng)的(de)逆程(cheng)脈沖。
6、經過(guo)整(zheng)流、濾波生成400V的(de)PFC電(dian)(dian)(dian)(dian)(dian)壓。PFC電(dian)(dian)(dian)(dian)(dian)壓送到(dao)(dao)(dao)主電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和PFC電(dian)(dian)(dian)(dian)(dian)壓檢測(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu),PFC檢測(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)檢測(ce)到(dao)(dao)(dao)PFC電(dian)(dian)(dian)(dian)(dian)壓達(da)到(dao)(dao)(dao)400V,PFC檢測(ce)開(kai)關電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)輸出電(dian)(dian)(dian)(dian)(dian)壓到(dao)(dao)(dao)主電(dian)(dian)(dian)(dian)(dian)源(yuan)震蕩電(dian)(dian)(dian)(dian)(dian)路(lu)(lu),振蕩電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)輸出高頻方波脈沖到(dao)(dao)(dao)主電(dian)(dian)(dian)(dian)(dian)源(yuan)功(gong)率開(kai)關管電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。
7、開關管工作(zuo)推動(dong)開關變壓器工作(zuo),從次級感應輸(shu)出2組電壓,經過(guo)整(zheng)流、濾(lv)波輸(shu)出+12V、+24V電壓。到此(ci),整(zheng)個電源板啟動(dong)過(guo)程(cheng)完(wan)成。
8、電視待機時,采用切斷PFC功率因數校正電路驅動控制電路UCC28051、主開關電源驅動控制電(dian)路DLA00l的VCC—ON供電(dian),主電(dian)源(yuan)停止工作。