電源(yuan)適配器是什么(me)?電(dian)(dian)源(yuan)適配器(qi)是小型(xing)便(bian)攜式電(dian)(dian)子(zi)設備(bei)(bei)及電(dian)(dian)子(zi)電(dian)(dian)器(qi)的供電(dian)(dian)電(dian)(dian)源(yuan)變(bian)換設備(bei)(bei)，一般(ban)由外殼、電(dian)(dian)源(yuan)變(bian)壓器(qi)和(he)整流電(dian)(dian)路組成，按其輸出類型(xing)可(ke)分為(wei)交流輸出型(xing)和(he)直流輸出型(xing);按連接方式可(ke)分為(wei)插墻式和(he)桌面式電(dian)(dian)源(yuan)適配器(qi)主要(yao)分這兩種，線性電(dian)(dian)源(yuan)和(he)開關電(dian)(dian)源(yuan)

1、線性電源是將交流電經過變壓器變壓，整流電路整流濾波得到未穩定的直流電壓，電源適配器要達到高精度的直流電壓，必須經過電壓反饋電路調整輸出電壓。優點：這種電源技術成熟，電路簡單，且沒有開關電源具有的干擾與噪音。

缺點：電壓(ya)反(fan)饋電路是工作在線性狀(zhuang)態，調整管(guan)的(de)功耗(hao)大，轉換效率低，因使用電感式變壓(ya)器故(gu)設備(bei)重(zhong)量大。

2、開關(guan)電(dian)(dian)(dian)源(yuan)是(shi)利用現(xian)代電(dian)(dian)(dian)子(zi)技術，控制(zhi)開關(guan)管開通和(he)關(guan)斷的時間(jian)比率，維持穩(wen)定輸出(chu)電(dian)(dian)(dian)壓(ya)(ya)的一(yi)種電(dian)(dian)(dian)源(yuan)，電(dian)(dian)(dian)源(yuan)適配器的開關(guan)電(dian)(dian)(dian)源(yuan)一(yi)般由(you)脈沖寬度調(diao)制(zhi)(PWM)控制(zhi)IC和(he)MOSFET構(gou)成優(you)點：工作(zuo)(zuo)效(xiao)率高，體積(ji)小，可以在寬電(dian)(dian)(dian)壓(ya)(ya)范圍內工作(zuo)(zuo)。缺點：對電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)路干擾較大，發生故障時檢修難度較大。

像我們日(ri)常使用的(de)筆記本電(dian)源適配器(qi)和手機(ji)充電(dian)器(qi)等(deng)，大多都(dou)是開關電(dian)源，都(dou)比較小巧(qiao)輕便，而飛(fei)天(tian)鷹科(ke)技(ji)主要(yao)生產的(de)也是開關電(dian)源。