電源模塊、電源適配器和充電器(qi)(qi)(qi)(qi)三者全(quan)是電源(yuan)，只不(bu)過在(zai)主要用途上大不(bu)一樣，他們全(quan)是采用開關電源(yuan)方(fang)式的(de)。可是小量充電器(qi)(qi)(qi)(qi)并不(bu)是采用開關電源(yuan)方(fang)法做的(de)，電源(yuan)適配器(qi)(qi)(qi)(qi)也是采用變電器(qi)(qi)(qi)(qi)輸出和線形整流器(qi)(qi)(qi)(qi)穩壓管輸出的(de)。

　　開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)是一種將電(dian)(dian)(dian)(dian)壓220V交流電(dian)(dian)(dian)(dian)流變為底(di)壓交流電(dian)(dian)(dian)(dian)的一種方法，差別于傳統式工(gong)(gong)頻變壓器，一般采(cai)用這(zhe)類電(dian)(dian)(dian)(dian)源(yuan)開(kai)關(guan)(guan)轉換工(gong)(gong)作電(dian)(dian)(dian)(dian)壓技術性的電(dian)(dian)(dian)(dian)源(yuan)稱之為開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)。電(dian)(dian)(dian)(dian)源(yuan)模(mo)塊(kuai)(kuai)就是說(shuo)一種中小型的開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)源(yuan)，關(guan)(guan)鍵分成(cheng)AC-DC電(dian)(dian)(dian)(dian)源(yuan)模(mo)塊(kuai)(kuai)和DC-DC電(dian)(dian)(dian)(dian)源(yuan)模(mo)塊(kuai)(kuai)。由(you)于重量(liang)輕，一般得(de)加外場(chang)元(yuan)器件應用，關(guan)(guan)鍵做為工(gong)(gong)作電(dian)(dian)(dian)(dian)壓變換功效，為系統軟件供電(dian)(dian)(dian)(dian)系統，不具備電(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)作用。

　　電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)就是指給(gei)機(ji)(ji)器(qi)(qi)(qi)(qi)設(she)備(bei)出示(shi)電(dian)(dian)磁能的電(dian)(dian)源(yuan)，如臺式電(dian)(dian)腦主機(ji)(ji)電(dian)(dian)源(yuan)、復印機(ji)(ji)電(dian)(dian)源(yuan)、顯示(shi)屏電(dian)(dian)源(yuan)，這種(zhong)不叫充電(dian)(dian)器(qi)(qi)(qi)(qi)。電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)具備(bei)容(rong)積較小、綠色(se)環保、多種(zhong)安全(quan)性維護、使(shi)用(yong)期長、運用(yong)覆蓋面廣(guang)等特性，大概可分成桌面型(xing)電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)、直插式電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)、多通道電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)、USB電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)這些。電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)包(bao)含充電(dian)(dian)器(qi)(qi)(qi)(qi)，可是充電(dian)(dian)器(qi)(qi)(qi)(qi)不包(bao)含電(dian)(dian)源(yuan)適(shi)配(pei)(pei)器(qi)(qi)(qi)(qi)。

　　充(chong)(chong)電(dian)(dian)器(qi)就是指(zhi)只給電(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)的(de)(de)電(dian)(dian)源(yuan)，是在開(kai)關(guan)電(dian)(dian)源(yuan)的(de)(de)基本上再加一個(ge)電(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)檢驗(yan)和(he)控制電(dian)(dian)路(lu)，如(ru)恒流(liu)、反接、浮充(chong)(chong)、均充(chong)(chong)工作(zuo)電(dian)(dian)壓的(de)(de)全自動(dong)調節這些。普遍的(de)(de)是USB充(chong)(chong)電(dian)(dian)器(qi)，也(ye)有手機上充(chong)(chong)電(dian)(dian)器(qi)、筆記本電(dian)(dian)腦電(dian)(dian)源(yuan)、電(dian)(dian)動(dong)車(che)充(chong)(chong)電(dian)(dian)器(qi)這些，充(chong)(chong)電(dian)(dian)器(qi)一般是將220V轉換為適合的(de)(de)交流(liu)電(dian)(dian)壓，依據電(dian)(dian)池(chi)(chi)的(de)(de)種類，會提升一個(ge)電(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)管理方法電(dian)(dian)源(yuan)電(dian)(dian)路(lu)，具(ju)備(bei)對(dui)電(dian)(dian)池(chi)(chi)開(kai)展電(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)的(de)(de)作(zuo)用(yong)。

　　一(yi)直供電(dian)系統給機器(qi)設備的(de)(de)供電(dian)系統電(dian)源(yuan)一(yi)般都叫(jiao)電(dian)源(yuan)適配器(qi)，像給沈陽監控(kong)攝(she)(she)像頭或(huo)電(dian)子產品，與usb充(chong)(chong)電(dian)器(qi)在設計方案(an)規定中大不一(yi)樣(yang)。usb充(chong)(chong)電(dian)器(qi)規定考(kao)慮不一(yi)樣(yang)頻率段不一(yi)樣(yang)電(dian)流量(liang)的(de)(de)必(bi)須，而監控(kong)器(qi)、監控(kong)攝(she)(she)像頭等機器(qi)設備供電(dian)系統的(de)(de)電(dian)源(yuan)適配器(qi)則偏重電(dian)流量(liang)平穩(wen)。

　　電源適配器關(guan)(guan)鍵適用中小型家用電器、電子(zi)器件產(chan)品，大(da)部(bu)分(fen)是恒壓(ya)源，維持輸出工作電壓(ya)穩定，隨機器設備(bei)負荷功率而全(quan)自(zi)動調節輸出電流量。而開(kai)關(guan)(guan)電源是操縱全(quan)部(bu)電源開(kai)關(guan)(guan)的變(bian)換電流量機器設備(bei)，適用全(quan)部(bu)的電子(zi)產(chan)品。