人(ren)們在開關電源技術(shu)領域(yu)是邊開發(fa)相(xiang)關(guan)電(dian)力電(dian)子器件，邊開發(fa)開關(guan)變頻(pin)技術(shu)，兩者相(xiang)互促進推動著開關(guan)電(dian)源每年以超過(guo)兩位數字的增(zeng)長率向著輕、小、薄、低(di)噪聲、高可(ke)靠、抗干擾的方向發(fa)展。開關(guan)電(dian)源可(ke)分為AC/DC和DC/DC兩大類(lei)。

微型低(di)功(gong)率開(kai)關(guan)電源
　　開(kai)關電(dian)(dian)(dian)(dian)源正在(zai)走向大眾(zhong)化，微型化。開(kai)關電(dian)(dian)(dian)(dian)源將逐步取代變壓器在(zai)生(sheng)活中(zhong)的(de)所有應用(yong)(yong)，低功率(lv)微型開(kai)關電(dian)(dian)(dian)(dian)源的(de)應用(yong)(yong)要首先(xian)體現在(zai)，數顯(xian)表(biao)、智(zhi)(zhi)能(neng)(neng)電(dian)(dian)(dian)(dian)表(biao)、手機(ji)充電(dian)(dian)(dian)(dian)器等方面(mian)。現階段國(guo)家在(zai)大力推廣智(zhi)(zhi)能(neng)(neng)電(dian)(dian)(dian)(dian)網建設，對電(dian)(dian)(dian)(dian)能(neng)(neng)表(biao)的(de)要求大幅(fu)提高，開(kai)關電(dian)(dian)(dian)(dian)源將逐步取代變壓器在(zai)電(dian)(dian)(dian)(dian)能(neng)(neng)表(biao)上面(mian)的(de)應用(yong)(yong)。
反轉(zhuan)式串聯開(kai)關電源
　　反(fan)(fan)(fan)轉式(shi)串(chuan)(chuan)聯(lian)開(kai)關電(dian)(dian)源與(yu)一(yi)般串(chuan)(chuan)聯(lian)式(shi)開(kai)關電(dian)(dian)源的區(qu)別(bie)是，這種反(fan)(fan)(fan)轉式(shi)串(chuan)(chuan)聯(lian)開(kai)關電(dian)(dian)源輸(shu)(shu)出(chu)的電(dian)(dian)壓是負電(dian)(dian)壓，正好與(yu)一(yi)般串(chuan)(chuan)聯(lian)式(shi)開(kai)關電(dian)(dian)源輸(shu)(shu)出(chu)的正電(dian)(dian)壓極性相反(fan)(fan)(fan)；并(bing)且由(you)于(yu)儲能電(dian)(dian)感L只在(zai)開(kai)關K關斷時才向(xiang)負載輸(shu)(shu)出(chu)電(dian)(dian)流(liu)，因此，在(zai)相同條(tiao)件下，反(fan)(fan)(fan)轉式(shi)串(chuan)(chuan)聯(lian)開(kai)關電(dian)(dian)源輸(shu)(shu)出(chu)的電(dian)(dian)流(liu)比串(chuan)(chuan)聯(lian)式(shi)開(kai)關電(dian)(dian)源輸(shu)(shu)出(chu)的電(dian)(dian)流(liu)小一(yi)倍(bei)。