我們知道在大(da)多數時(shi)候，大(da)部(bu)分都(dou)是(shi)安(an)全可靠(kao)的，不(bu)然(ran)我們也(ye)不(bu)敢每天(tian)晚上把他們放(fang)在床(chuang)頭(tou)充電。但(dan)是(shi)很(hen)多(duo)事都(dou)不(bu)是(shi)絕對的，電源適配器雖然(ran)看起來老(lao)實可靠(kao)，但(dan)有(you)時候也(ye)是(shi)會(hui)產(chan)生危險(xian)，特(te)別是(shi)現在市面上有(you)許多(duo)做工不(bu)良的劣質電源存在。那么可能(neng)會(hui)發生的危險(xian)都(dou)有(you)哪些？

手機(ji)(ji)電(dian)(dian)(dian)(dian)源(yuan)適配器(qi)(qi)的(de)(de)小型化趨勢非(fei)常明(ming)顯，和傳(chuan)統大個(ge)頭的(de)(de)變(bian)壓(ya)器(qi)(qi)相比(bi)，現在的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)適配器(qi)(qi)多(duo)(duo)使(shi)用了開關電(dian)(dian)(dian)(dian)源(yuan)，取而代之的(de)(de)是(shi)體積(ji)非(fei)常小的(de)(de)高頻(pin)變(bian)壓(ya)器(qi)(qi)，而部分做的(de)(de)比(bi)較(jiao)好的(de)(de)充電(dian)(dian)(dian)(dian)器(qi)(qi)還帶有(you)輸出反饋(kui)，輸出反饋(kui)多(duo)(duo)數是(shi)通過光(guang)(guang)耦等器(qi)(qi)件。這里值(zhi)說(shuo)明(ming)一(yi)點(dian)，無論(lun)是(shi)高頻(pin)變(bian)壓(ya)器(qi)(qi)還是(shi)光(guang)(guang)耦反饋(kui)一(yi)個(ge)是(shi)電(dian)(dian)(dian)(dian)磁隔離一(yi)個(ge)是(shi)光(guang)(guang)隔離，都是(shi)沒(mei)有(you)電(dian)(dian)(dian)(dian)器(qi)(qi)連接的(de)(de)，即使(shi)變(bian)壓(ya)器(qi)(qi)或(huo)者其他元件燒壞，正常情(qing)況(kuang)下220V電(dian)(dian)(dian)(dian)源(yuan)不(bu)會串到手機(ji)(ji)這邊來。發生被電(dian)(dian)(dian)(dian)死這種(zhong)情(qing)形，最有(you)可能的(de)(de)情(qing)況(kuang)是(shi)充電(dian)(dian)(dian)(dian)器(qi)(qi)進水導致電(dian)(dian)(dian)(dian)路短路。

電(dian)(dian)源適(shi)(shi)配器(qi)損壞，最多(duo)的(de)(de)是(shi)兩種情況，第(di)一(yi)種是(shi)爆(bao)(bao)電(dian)(dian)容(rong)，這個(ge)動(dong)靜(jing)比較(jiao)大(da)，由(you)于是(shi)開關式(shi)電(dian)(dian)壓調節，一(yi)旦(dan)這部分電(dian)(dian)路(lu)有(you)(you)問題，電(dian)(dian)壓不正(zheng)常，最直接的(de)(de)就(jiu)是(shi)爆(bao)(bao)電(dian)(dian)容(rong)。第(di)二是(shi)爆(bao)(bao)變壓器(qi)，這多(duo)是(shi)負載引起，由(you)于多(duo)數(shu)電(dian)(dian)源適(shi)(shi)配器(qi)虛(xu)標(biao)，多(duo)數(shu)還(huan)沒(mei)有(you)(you)反(fan)饋和保護電(dian)(dian)路(lu)，變壓器(qi)爆(bao)(bao)掉(diao)就(jiu)非常常見。只要不進(jin)水(shui)不損壞，這兩種一(yi)般對(dui)人(ren)沒(mei)有(you)(you)太大(da)危(wei)險，但(dan)是(shi)由(you)于很多(duo)充(chong)(chong)電(dian)(dian)器(qi)小型化，高壓和低壓靠的(de)(de)很近，很多(duo)充(chong)(chong)電(dian)(dian)器(qi)里面(mian)有(you)(you)沒(mei)有(you)(you)充(chong)(chong)分的(de)(de)物(wu)理隔離，爆(bao)(bao)個(ge)電(dian)(dian)容(rong)這種能量很容(rong)易導致里面(mian)的(de)(de)元件錯位、粘(zhan)連(lian)從而造成危(wei)險。