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、手機以及平板(ban)電(dian)(dian)腦(nao)等(deng)等(deng)都會使用到(dao)電(dian)(dian)源(yuan)(yuan)板(ban)。電(dian)(dian)源(yuan)(yuan)板(ban)對于電(dian)(dian)子產品是非常重(zhong)要的，所以市場(chang)上也有很多品牌的電(dian)(dian)源(yuan)(yuan)板(ban)，他們有好有壞，需要我們在購買的時候仔細辨別(bie)。

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二、電源板工作原理是什么

1、通電后副(fu)電源首先(xian)啟動工作，為主電路板(ban)微(wei)處理器(qi)控制系統提供正5伏(fu)的工作電壓。

2、開(kai)機后，副電(dian)源為PFC功率因數校正(zheng)(zheng)電(dian)路(lu)(lu)(lu)驅動(dong)控制(zhi)電(dian)路(lu)(lu)(lu)UCC28051、主開(kai)關電(dian)源驅動(dong)巨(ju)制(zhi)電(dian)路(lu)(lu)(lu)DLA001的提供(gong)(gong) VCC—ON供(gong)(gong)電(dian)，主開(kai)關電(dian)源啟(qi)動(dong)工作，向主電(dian)路(lu)(lu)(lu)板負載電(dian)路(lu)(lu)(lu)提供(gong)(gong)正(zheng)(zheng)24伏(fu)和正(zheng)(zheng)12伏(fu)兩種電(dian)壓。

3、經過抗干擾電路(lu)濾除市電中的雜(za)波干擾，整(zheng)流、PFC電感、濾波輸(shu)(shu)出300V直(zhi)流電壓(ya)到副(fu)電源電路(lu)，副(fu)電源開始工作輸(shu)(shu)出+5v電壓(ya)。

4、經電源板輸(shu)出排插端(duan)口(kou)1腳到數字板CPU電路，CPU電路經過(guo)讀(du)取數據開(kai)機(ji)輸(shu)出高電平(ping)開(kai)機(ji)電壓。

5、經電(dian)(dian)(dian)(dian)源板(ban)排插端口2腳到電(dian)(dian)(dian)(dian)源板(ban)穩壓開關機(ji)控(kong)制(zhi)電(dian)(dian)(dian)(dian)路，開關機(ji)控(kong)制(zhi)電(dian)(dian)(dian)(dian)路工作(zuo)，輸(shu)出電(dian)(dian)(dian)(dian)壓到PFC振蕩電(dian)(dian)(dian)(dian)路，輸(shu)出高頻方渡脈沖推動(dong)PFC開關管(guan)工作(zuo)，利用PFC電(dian)(dian)(dian)(dian)感產生的逆(ni)程脈沖。

6、經過整流、濾(lv)波生成400V的PFC電(dian)(dian)(dian)(dian)壓(ya)。PFC電(dian)(dian)(dian)(dian)壓(ya)送到(dao)主電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)路(lu)和(he)PFC電(dian)(dian)(dian)(dian)壓(ya)檢(jian)測電(dian)(dian)(dian)(dian)路(lu)，PFC檢(jian)測電(dian)(dian)(dian)(dian)路(lu)檢(jian)測到(dao)PFC電(dian)(dian)(dian)(dian)壓(ya)達到(dao)400V，PFC檢(jian)測開關電(dian)(dian)(dian)(dian)路(lu)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)到(dao)主電(dian)(dian)(dian)(dian)源震蕩電(dian)(dian)(dian)(dian)路(lu)，振蕩電(dian)(dian)(dian)(dian)路(lu)輸出(chu)高(gao)頻(pin)方波脈(mo)沖到(dao)主電(dian)(dian)(dian)(dian)源功率開關管電(dian)(dian)(dian)(dian)路(lu)。

7、開關管工作推(tui)動開關變(bian)壓(ya)器工作，從(cong)次級感應輸出(chu)(chu)2組(zu)電(dian)壓(ya)，經過整流、濾波輸出(chu)(chu)+12V、+24V電(dian)壓(ya)。到此，整個電(dian)源(yuan)板啟動過程完成。

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(dong)控制電路DLA00l的VCC—ON供電，主電源停止工作。