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)機以及(ji)平板電腦等等都(dou)會使(shi)用到電源(yuan)板。電源(yuan)板對于電子產品是非(fei)常重要(yao)的，所以市場上也(ye)有很多品牌(pai)的電源(yuan)板，他們有好有壞(huai)，需要(yao)我們在購買的時候仔細辨別。

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二、電源板工作原理是什么

1、通電(dian)后副電(dian)源首先啟(qi)動工作(zuo)，為主(zhu)電(dian)路板微處(chu)理器控制系統提(ti)供正5伏的(de)工作(zuo)電(dian)壓。

2、開機后，副電(dian)(dian)(dian)源(yuan)為PFC功率(lv)因數校正(zheng)電(dian)(dian)(dian)路(lu)(lu)驅(qu)動控制(zhi)電(dian)(dian)(dian)路(lu)(lu)UCC28051、主開關(guan)電(dian)(dian)(dian)源(yuan)驅(qu)動巨制(zhi)電(dian)(dian)(dian)路(lu)(lu)DLA001的提供(gong) VCC—ON供(gong)電(dian)(dian)(dian)，主開關(guan)電(dian)(dian)(dian)源(yuan)啟動工作，向(xiang)主電(dian)(dian)(dian)路(lu)(lu)板負載電(dian)(dian)(dian)路(lu)(lu)提供(gong)正(zheng)24伏和(he)正(zheng)12伏兩(liang)種電(dian)(dian)(dian)壓。

3、經過抗干(gan)擾(rao)(rao)電(dian)(dian)路(lu)濾除市電(dian)(dian)中(zhong)的雜波干(gan)擾(rao)(rao)，整流、PFC電(dian)(dian)感、濾波輸出300V直流電(dian)(dian)壓(ya)到副電(dian)(dian)源電(dian)(dian)路(lu)，副電(dian)(dian)源開始(shi)工作輸出+5v電(dian)(dian)壓(ya)。

4、經(jing)電源板輸出排(pai)插端口1腳到數字板CPU電路，CPU電路經(jing)過(guo)讀(du)取數據開機輸出高(gao)電平(ping)開機電壓(ya)。

5、經(jing)電(dian)(dian)(dian)源(yuan)板排插(cha)端口2腳到電(dian)(dian)(dian)源(yuan)板穩壓開(kai)關(guan)機控制(zhi)電(dian)(dian)(dian)路(lu)，開(kai)關(guan)機控制(zhi)電(dian)(dian)(dian)路(lu)工作(zuo)，輸出(chu)電(dian)(dian)(dian)壓到PFC振蕩電(dian)(dian)(dian)路(lu)，輸出(chu)高頻方渡脈(mo)沖推動PFC開(kai)關(guan)管工作(zuo)，利用PFC電(dian)(dian)(dian)感(gan)產生的逆程(cheng)脈(mo)沖。

6、經過整流、濾波(bo)生(sheng)成400V的PFC電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。PFC電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)送到(dao)(dao)(dao)主(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)路(lu)和PFC電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)檢(jian)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)，PFC檢(jian)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)檢(jian)測(ce)(ce)到(dao)(dao)(dao)PFC電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)達到(dao)(dao)(dao)400V，PFC檢(jian)測(ce)(ce)開(kai)(kai)關電(dian)(dian)(dian)(dian)(dian)路(lu)輸(shu)(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)到(dao)(dao)(dao)主(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)震蕩(dang)電(dian)(dian)(dian)(dian)(dian)路(lu)，振蕩(dang)電(dian)(dian)(dian)(dian)(dian)路(lu)輸(shu)(shu)出高頻方(fang)波(bo)脈沖到(dao)(dao)(dao)主(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)功(gong)率開(kai)(kai)關管(guan)電(dian)(dian)(dian)(dian)(dian)路(lu)。

7、開關管(guan)工作(zuo)推動開關變壓器工作(zuo)，從次級(ji)感應輸(shu)出2組電壓，經過(guo)整(zheng)(zheng)流、濾波輸(shu)出+12V、+24V電壓。到此，整(zheng)(zheng)個(ge)電源板啟動過(guo)程完(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(qu)動控制電路DLA00l的(de)VCC—ON供電，主電源(yuan)停止工作。