人們在開關電源技術(shu)領域是邊開(kai)(kai)(kai)發(fa)相關(guan)電(dian)力電(dian)子器件，邊開(kai)(kai)(kai)發(fa)開(kai)(kai)(kai)關(guan)變頻技術(shu)，兩者(zhe)相互促進推動著開(kai)(kai)(kai)關(guan)電(dian)源(yuan)(yuan)每年以(yi)超過兩位數字的增(zeng)長率(lv)向著輕、小、薄、低噪(zao)聲、高可靠(kao)、抗干擾的方(fang)向發(fa)展(zhan)。開(kai)(kai)(kai)關(guan)電(dian)源(yuan)(yuan)可分為AC/DC和DC/DC兩大類(lei)。

微型低功率開關電源
　　開關(guan)電(dian)(dian)(dian)源正(zheng)在(zai)(zai)走向(xiang)大眾(zhong)化(hua)，微(wei)型化(hua)。開關(guan)電(dian)(dian)(dian)源將逐(zhu)步取代(dai)變壓器(qi)(qi)在(zai)(zai)生活(huo)中的(de)(de)所有應用(yong)，低功率微(wei)型開關(guan)電(dian)(dian)(dian)源的(de)(de)應用(yong)要(yao)首(shou)先體現在(zai)(zai)，數顯(xian)表(biao)(biao)、智能(neng)(neng)(neng)電(dian)(dian)(dian)表(biao)(biao)、手機充電(dian)(dian)(dian)器(qi)(qi)等方面。現階(jie)段國家在(zai)(zai)大力推(tui)廣智能(neng)(neng)(neng)電(dian)(dian)(dian)網(wang)建(jian)設，對電(dian)(dian)(dian)能(neng)(neng)(neng)表(biao)(biao)的(de)(de)要(yao)求大幅提(ti)高，開關(guan)電(dian)(dian)(dian)源將逐(zhu)步取代(dai)變壓器(qi)(qi)在(zai)(zai)電(dian)(dian)(dian)能(neng)(neng)(neng)表(biao)(biao)上面的(de)(de)應用(yong)。
反轉式(shi)串(chuan)聯開(kai)關電源
　　反(fan)(fan)轉(zhuan)式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)與一般串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)的(de)(de)區別是(shi)，這種反(fan)(fan)轉(zhuan)式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)出(chu)(chu)的(de)(de)電(dian)(dian)(dian)(dian)壓是(shi)負(fu)電(dian)(dian)(dian)(dian)壓，正(zheng)好(hao)與一般串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)出(chu)(chu)的(de)(de)正(zheng)電(dian)(dian)(dian)(dian)壓極(ji)性相反(fan)(fan)；并且由于儲能(neng)電(dian)(dian)(dian)(dian)感L只在開(kai)關(guan)(guan)K關(guan)(guan)斷時才向負(fu)載輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)流(liu)，因此，在相同條(tiao)件(jian)下(xia)，反(fan)(fan)轉(zhuan)式(shi)串(chuan)聯(lian)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)出(chu)(chu)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)比(bi)串(chuan)聯(lian)式(shi)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)輸(shu)出(chu)(chu)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)小一倍。