為了保證產品的質量和耐用性，電(dian)源(yuan)適配器廠家會對電(dian)源進(jin)行老(lao)化測試，賽選出不可格(ge)的(de)產(chan)(chan)品。功率(lv)老(lao)化是(shi)很(hen)有效的(de)一種篩(shai)選方法，是(shi)高(gao)可靠電(dian)源產(chan)(chan)品必(bi)須(xu)進(jin)行的(de)篩(shai)選手段之一。

功(gong)率老化通過(guo)對電(dian)源(yuan)施加過(guo)電(dian)應(ying)力(li)，助使早期失(shi)效(xiao)器件存在的(de)潛在缺陷盡快暴露而(er)剔(ti)(ti)除(chu)。它能有效(xiao)的(de)剔(ti)(ti)除(chu)器件生產過(guo)程(cheng)中產生的(de)工(gong)藝缺陷。

功(gong)(gong)(gong)(gong)(gong)率老化(hua)(hua)(hua)通常是(shi)將(jiang)電(dian)(dian)(dian)源(yuan)置于(yu)高(gao)溫條件下，施(shi)加最(zui)大的(de)(de)電(dian)(dian)(dian)壓、負(fu)載，以(yi)獲得(de)足夠大的(de)(de)篩(shai)選應力，達到(dao)剔除早期失效產品的(de)(de)目的(de)(de)。所施(shi)加的(de)(de)電(dian)(dian)(dian)應力，包括(kuo)輸入的(de)(de)交流(liu)高(gao)壓、功(gong)(gong)(gong)(gong)(gong)率老化(hua)(hua)(hua)、電(dian)(dian)(dian)壓沖擊。使(shi)電(dian)(dian)(dian)源(yuan)內部(bu)的(de)(de)元器件在老化(hua)(hua)(hua)過程中能經受(shou)工作(zuo)狀態(tai)下的(de)(de)最(zui)大功(gong)(gong)(gong)(gong)(gong)耗和應力。超(chao)(chao)功(gong)(gong)(gong)(gong)(gong)率老化(hua)(hua)(hua)顯然(ran)縮短老化(hua)(hua)(hua)時間，但(dan)也有(you)可能使(shi)器件瞬(shun)時負(fu)載超(chao)(chao)過最(zui)大額定值，使(shi)合(he)格器件遭受(shou)損傷，甚至發生即時劣化(hua)(hua)(hua)或擊穿(chuan)。有(you)的(de)(de)產品可能暫時還能工作(zuo)，但(dan)壽命卻縮短了。所以(yi)，對于(yu)超(chao)(chao)功(gong)(gong)(gong)(gong)(gong)率老化(hua)(hua)(hua)來說，并不是(shi)超(chao)(chao)得(de)越(yue)多越(yue)有(you)效果，而是(shi)應該選擇(ze)一(yi)個最(zui)佳(jia)的(de)(de)超(chao)(chao)負(fu)荷量。現(xian)在比較(jiao)一(yi)致的(de)(de)方(fang)法(fa)是(shi)對電(dian)(dian)(dian)源(yuan)施(shi)加最(zui)大額定功(gong)(gong)(gong)(gong)(gong)率，適當延長老化(hua)(hua)(hua)時間，是(shi)比較(jiao)合(he)理(li)的(de)(de)電(dian)(dian)(dian)功(gong)(gong)(gong)(gong)(gong)率老化(hua)(hua)(hua)篩(shai)選方(fang)法(fa)。

可(ke)(ke)靠(kao)(kao)性(xing)篩(shai)選(xuan)試(shi)(shi)驗(yan)設(she)計的(de)(de)(de)目(mu)的(de)(de)(de)是要確定(ding)試(shi)(shi)驗(yan)條件，包括試(shi)(shi)驗(yan)的(de)(de)(de)項目(mu)、試(shi)(shi)驗(yan)應(ying)力和(he)試(shi)(shi)驗(yan)時間。由(you)于不同(tong)(tong)類型的(de)(de)(de)產(chan)(chan)品，不同(tong)(tong)的(de)(de)(de)生產(chan)(chan)廠家或使(shi)用不同(tong)(tong)的(de)(de)(de)材(cai)料、結構、工藝流程所生產(chan)(chan)的(de)(de)(de)產(chan)(chan)品其失(shi)效(xiao)機理是不同(tong)(tong)的(de)(de)(de)，并且早期(qi)失(shi)效(xiao)期(qi)與(yu)偶(ou)然失(shi)效(xiao)期(qi)的(de)(de)(de)分(fen)界(jie)點也(ye)不可(ke)(ke)能一樣，很難(nan)制訂一個適應(ying)各種(zhong)產(chan)(chan)品的(de)(de)(de)統一的(de)(de)(de)可(ke)(ke)靠(kao)(kao)性(xing)篩(shai)選(xuan)試(shi)(shi)驗(yan)條件。因此，必(bi)須針(zhen)對產(chan)(chan)品的(de)(de)(de)特點進行大量(liang)的(de)(de)(de)可(ke)(ke)靠(kao)(kao)性(xing)試(shi)(shi)驗(yan)或可(ke)(ke)靠(kao)(kao)性(xing)篩(shai)選(xuan)摸底試(shi)(shi)驗(yan)，掌握(wo)產(chan)(chan)品的(de)(de)(de)失(shi)效(xiao)分(fen)布以及失(shi)效(xiao)機理與(yu)篩(shai)選(xuan)試(shi)(shi)驗(yan)項目(mu)、應(ying)力和(he)時間的(de)(de)(de)關系，而后才能正確地(di)擬定(ding)出該產(chan)(chan)品的(de)(de)(de)可(ke)(ke)靠(kao)(kao)性(xing)篩(shai)選(xuan)試(shi)(shi)驗(yan)條件。

顯(xian)然(ran)，如果可(ke)靠(kao)性(xing)(xing)篩(shai)選(xuan)(xuan)試驗(yan)條件不妥當，則可(ke)能會使一(yi)些產品因篩(shai)選(xuan)(xuan)試驗(yan)強(qiang)度不夠而造成可(ke)靠(kao)性(xing)(xing)和穩定性(xing)(xing)不能滿足要求，或者因為漏(lou)掉必要的(de)篩(shai)選(xuan)(xuan)試驗(yan)項目(mu)而使這部分早期失效品未能篩(shai)選(xuan)(xuan)出來。另外，也可(ke)能因篩(shai)選(xuan)(xuan)試驗(yan)條件過嚴而把本(ben)來是好的(de)產品剔除掉一(yi)部分。