在日常生活當中我們有時候會遇到出現一些小問題的情況，比如手機充電器、PC電源以及一些小家電的電源適配器損壞。那么如何才能設計出安全可靠，更耐用的產品呢？今天飛天鷹科技與大家分享一下自己的經驗。

1、電(dian)壓應力

電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓應力是保(bao)證電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)可靠(kao)性(xing)的(de)(de)一個重(zhong)要指標。在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)中有(you)許多器件都有(you)規定最(zui)大(da)耐壓值，比(bi)如：場效應管的(de)(de)Vds和Vgs、二極管的(de)(de)反向耐壓、IC的(de)(de)最(zui)大(da)VCC電(dian)(dian)(dian)(dian)(dian)(dian)壓以及(ji)輸入輸出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)容的(de)(de)最(zui)大(da)耐壓。所(suo)以我(wo)們(men)設計時(shi)必須(xu)(xu)要考慮到器件要承(cheng)受的(de)(de)最(zui)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)壓。再根據電(dian)(dian)(dian)(dian)(dian)(dian)壓選擇適當(dang)器件，最(zui)后再進行(xing)實際測(ce)試加以驗證。但在(zai)測(ce)試時(shi)我(wo)們(men)必須(xu)(xu)測(ce)試電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)所(suo)有(you)工作狀(zhuang)態(tai)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓應力，以確保(bao)在(zai)最(zui)惡劣的(de)(de)工作狀(zhuang)態(tai)下也能(neng)留(liu)出(chu)(chu)約10%的(de)(de)安全裕(yu)量。

2、電流應力

電源電流(liu)(liu)應力(li)往往與熱應力(li)密切相關，比(bi)如二極(ji)管SK54最大平(ping)均電流(liu)(liu)為5A，但(dan)是它是在滿(man)足熱應力(li)降額前提下的(de)極(ji)限參數。所以(yi)我(wo)們選(xuan)擇(ze)(ze)器(qi)(qi)件(jian)時(shi)必須要同時(shi)滿(man)足器(qi)(qi)件(jian)的(de)電流(liu)(liu)應力(li)與熱應力(li)；在滿(man)足器(qi)(qi)件(jian)熱應力(li)的(de)前提下，選(xuan)擇(ze)(ze)合適額定(ding)電流(liu)(liu)值的(de)器(qi)(qi)件(jian)方(fang)可保證電源可靠性(xing)要求。

3. 保護電路

保護(hu)(hu)(hu)電(dian)(dian)(dian)(dian)路(lu)(lu)具(ju)體(ti)有(you)輸(shu)(shu)(shu)入欠壓(ya)(ya)(ya)保護(hu)(hu)(hu)、輸(shu)(shu)(shu)入過(guo)(guo)壓(ya)(ya)(ya)保護(hu)(hu)(hu)、輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)流保護(hu)(hu)(hu)、輸(shu)(shu)(shu)出(chu)(chu)短(duan)路(lu)(lu)保護(hu)(hu)(hu)和(he)(he)輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)壓(ya)(ya)(ya)保護(hu)(hu)(hu)等(deng)等(deng)。為(wei)避免輸(shu)(shu)(shu)入電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)過(guo)(guo)低時電(dian)(dian)(dian)(dian)源(yuan)出(chu)(chu)現(xian)非正常(chang)工作的(de)現(xian)象(xiang)，電(dian)(dian)(dian)(dian)源(yuan)需添加(jia)輸(shu)(shu)(shu)入欠壓(ya)(ya)(ya)保護(hu)(hu)(hu)；為(wei)避免輸(shu)(shu)(shu)入電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)過(guo)(guo)高(gao)，從(cong)而期間(jian)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)應力(li)超(chao)標，電(dian)(dian)(dian)(dian)源(yuan)需添加(jia)輸(shu)(shu)(shu)入過(guo)(guo)壓(ya)(ya)(ya)保護(hu)(hu)(hu)；為(wei)避免輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)流和(he)(he)短(duan)路(lu)(lu)從(cong)而導致器(qi)件過(guo)(guo)熱、磁飽和(he)(he)等(deng)現(xian)象(xiang)，電(dian)(dian)(dian)(dian)源(yuan)需添加(jia)過(guo)(guo)流保護(hu)(hu)(hu)和(he)(he)短(duan)路(lu)(lu)保護(hu)(hu)(hu)；為(wei)避免電(dian)(dian)(dian)(dian)源(yuan)出(chu)(chu)現(xian)輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)過(guo)(guo)高(gao)導致電(dian)(dian)(dian)(dian)源(yuan)負載端損壞(huai)，電(dian)(dian)(dian)(dian)源(yuan)需添加(jia)輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)壓(ya)(ya)(ya)保護(hu)(hu)(hu)。

影(ying)響電(dian)(dian)(dian)源(yuan)(yuan)適配器可(ke)(ke)(ke)靠(kao)性因(yin)素有(you)(you)很多，比如還有(you)(you)EMC、安規和過(guo)熱保護等都是(shi)影(ying)響電(dian)(dian)(dian)源(yuan)(yuan)可(ke)(ke)(ke)靠(kao)的(de)關(guan)鍵的(de)因(yin)素。設(she)計(ji)(ji)電(dian)(dian)(dian)源(yuan)(yuan)可(ke)(ke)(ke)能(neng)不(bu)會太(tai)難，但要(yao)想設(she)計(ji)(ji)出穩(wen)定可(ke)(ke)(ke)靠(kao)的(de)電(dian)(dian)(dian)源(yuan)(yuan)絕不(bu)會太(tai)容(rong)易，所幸飛天鷹有(you)(you)者17年來研究探索的(de)經驗與強大的(de)研發團隊，幫助我們生產(chan)出了高品質，穩(wen)定性好的(de)電(dian)(dian)(dian)源(yuan)(yuan)產(chan)品。