電源模塊、充電器和電源適(shi)配器三(san)者都(dou)是電源，只(zhi)不過是在用途上(shang)有所(suo)不同，它們都(dou)是采(cai)(cai)用開(kai)關電源規劃的(de)(de)。但是少量充電器(qi)不是用開(kai)關電源做的(de)(de)，電源適配器(qi)也有采(cai)(cai)用變壓器(qi)輸出(chu)和線性整流穩(wen)壓輸出(chu)的(de)(de)。

開(kai)關電(dian)(dian)(dian)(dian)源是一(yi)種(zhong)將(jiang)市電(dian)(dian)(dian)(dian)220V交(jiao)流電(dian)(dian)(dian)(dian)轉(zhuan)為(wei)(wei)低壓(ya)直流電(dian)(dian)(dian)(dian)的一(yi)種(zhong)方式，區別于傳統工頻(pin)變壓(ya)器(qi)，一(yi)般采用這種(zhong)開(kai)關變換電(dian)(dian)(dian)(dian)壓(ya)技術的電(dian)(dian)(dian)(dian)源稱為(wei)(wei)開(kai)關電(dian)(dian)(dian)(dian)源。電(dian)(dian)(dian)(dian)源模塊就是一(yi)種(zhong)小型的開(kai)關電(dian)(dian)(dian)(dian)源，主要(yao)分為(wei)(wei)AC-DC電(dian)(dian)(dian)(dian)源模塊和DC-DC電(dian)(dian)(dian)(dian)源模塊。因為(wei)(wei)體積(ji)小，通常要(yao)加外圍元件(jian)使用，主要(yao)作(zuo)為(wei)(wei)電(dian)(dian)(dian)(dian)壓(ya)轉(zhuan)換穩壓(ya)作(zuo)用，為(wei)(wei)系統供電(dian)(dian)(dian)(dian)，不(bu)具有充電(dian)(dian)(dian)(dian)功能(neng)。

充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器是指(zhi)只(zhi)給電(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)的(de)(de)電(dian)(dian)(dian)源(yuan)(yuan)，是在開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)基礎上加(jia)上一個充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)檢測(ce)和控制回路(lu)，如恒流、反(fan)接、浮(fu)充(chong)(chong)(chong)(chong)、均充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)壓的(de)(de)自動調整等(deng)等(deng)。常(chang)見的(de)(de)是USB充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器，還有(you)手機(ji)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器、筆記本電(dian)(dian)(dian)源(yuan)(yuan)、電(dian)(dian)(dian)瓶車充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器等(deng)等(deng)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)器一般(ban)是將(jiang)220V轉(zhuan)化為(wei)適宜的(de)(de)直流電(dian)(dian)(dian)壓，根據充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)池(chi)的(de)(de)品種，會(hui)增加(jia)一個充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)管理電(dian)(dian)(dian)路(lu)，具有(you)對充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)池(chi)進行充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)的(de)(de)功(gong)能(neng)。

電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)是指給(gei)設備提供(gong)電(dian)能的電(dian)源(yuan)，如電(dian)腦主機(ji)電(dian)源(yuan)、打印(yin)機(ji)電(dian)源(yuan)、顯示器(qi)(qi)(qi)電(dian)源(yuan)，這些不(bu)叫充電(dian)器(qi)(qi)(qi)。電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)具有體(ti)積較小、節能環保、多重安全保護、使用壽(shou)命(ming)長、應(ying)用范圍廣等(deng)特點，大致(zhi)可(ke)分為(wei)桌(zhuo)面式電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)、直(zhi)插(cha)式電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)、多路電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)、USB電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)等(deng)等(deng)。電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)包括充電(dian)器(qi)(qi)(qi)，但(dan)是充電(dian)器(qi)(qi)(qi)不(bu)包括電(dian)源(yuan)適(shi)(shi)配(pei)(pei)器(qi)(qi)(qi)。

一直供(gong)電(dian)(dian)(dian)給(gei)設(she)(she)備(bei)的供(gong)電(dian)(dian)(dian)電(dian)(dian)(dian)源(yuan)(yuan)通(tong)常都叫電(dian)(dian)(dian)源(yuan)(yuan)適配(pei)器(qi)，像(xiang)給(gei)監(jian)控(kong)攝像(xiang)頭或電(dian)(dian)(dian)子設(she)(she)備(bei)，與usb充(chong)電(dian)(dian)(dian)器(qi)在設(she)(she)計要求中有所不(bu)同(tong)。usb充(chong)電(dian)(dian)(dian)器(qi)要求滿足不(bu)同(tong)頻段不(bu)同(tong)電(dian)(dian)(dian)流的需要，而(er)監(jian)控(kong)等電(dian)(dian)(dian)子設(she)(she)備(bei)供(gong)電(dian)(dian)(dian)的電(dian)(dian)(dian)源(yuan)(yuan)適配(pei)器(qi)則偏(pian)向電(dian)(dian)(dian)流穩定。