選(xuan)擇一款電源適配(pei)器，應綜合考(kao)慮多方面因(yin)素。這里深圳飛天鷹向(xiang)大(da)家分享一些選購技巧，希望(wang)對你有(you)所幫助。

1、選用(yong)(yong)合適的輸入(ru)(ru)電(dian)壓(ya)范(fan)圍。以(yi)交流輸入(ru)(ru)為例(li)，常用(yong)(yong)的輸入(ru)(ru)電(dian)壓(ya)規(gui)格有110V，220V，所(suo)以(yi)相應(ying)就有了110V、220V交流切(qie)換，以(yi)及通用(yong)(yong)輸入(ru)(ru)電(dian)壓(ya)（AC：85V-264V）三種規(gui)格。應(ying)根據使用(yong)(yong)地區選定(ding)輸入(ru)(ru)電(dian)壓(ya)規(gui)格。

2、選擇(ze)合適的(de)功(gong)(gong)率(lv)。開關電源在工作時(shi)會(hui)消耗一部分功(gong)(gong)率(lv)，并以熱量(liang)的(de)形式釋(shi)放出(chu)來(lai)。為(wei)了使電源的(de)壽命增(zeng)長，建議選用多(duo)30%輸出(chu)功(gong)(gong)率(lv)額定的(de)機種。

3、考慮(lv)負載特性。為(wei)了(le)提高系(xi)統的可靠性，建議(yi)開關電源工作(zuo)在50%-80%負載為(wei)佳，即假設所用(yong)功率(lv)為(wei)20W，應選(xuan)用(yong)輸出功率(lv)為(wei)25W-40W的開關電源。

4、如果負載(zai)是馬達(da)、燈泡或電容性負載(zai)，當(dang)開機瞬間時(shi)電流較大(da)，應(ying)選用合適電源(yuan)以免過載(zai)。如果負載(zai)是馬達(da)時(shi)應(ying)考慮停機時(shi)電壓倒灌。

5、此外(wai)尚需考慮電源的(de)工作環(huan)(huan)境溫(wen)(wen)度(du)，及有(you)無額外(wai)的(de)輔助散(san)熱設(she)備，在過高a的(de)環(huan)(huan)溫(wen)(wen)電源需減(jian)(jian)額輸出。需參考環(huan)(huan)溫(wen)(wen)對輸出功率的(de)減(jian)(jian)額曲線。

6、根(gen)據應用所需選擇(ze)各項功(gong)(gong)(gong)(gong)能(neng)(neng)：保護功(gong)(gong)(gong)(gong)能(neng)(neng)：過(guo)(guo)電(dian)壓保護（OVP）、過(guo)(guo)溫(wen)度保護（OTP）、過(guo)(guo)負載保護（OLP）等(deng)。應用功(gong)(gong)(gong)(gong)能(neng)(neng)：信號功(gong)(gong)(gong)(gong)能(neng)(neng)（供(gong)電(dian)正常(chang)、供(gong)電(dian)失效）、遙控功(gong)(gong)(gong)(gong)能(neng)(neng)、遙測功(gong)(gong)(gong)(gong)能(neng)(neng)、并(bing)聯功(gong)(gong)(gong)(gong)能(neng)(neng)等(deng)。 特殊功(gong)(gong)(gong)(gong)能(neng)(neng)：功(gong)(gong)(gong)(gong)因矯正（PFC）、不斷電(dian)（UPS）

7、選擇所(suo)需(xu)符(fu)合(he)的安規及(ji)電(dian)(dian)(dian)(dian)(dian)(dian)磁兼容(rong)（EMC）認證(zheng)。 根據(ju)使用情況，定出(chu)(chu)需(xu)要(yao)的輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓、電(dian)(dian)(dian)(dian)(dian)(dian)流；電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的尺寸(cun)、安裝(zhuang)方式和安裝(zhuang)孔位；有(you)幾路輸(shu)出(chu)(chu)，各路輸(shu)出(chu)(chu)是否需(xu)要(yao)電(dian)(dian)(dian)(dian)(dian)(dian)氣隔離；輸(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)(dian)壓范圍；根據(ju)環境溫(wen)度，決定開關電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的降額程(cheng)度，電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)功率；是否需(xu)要(yao)認證(zheng)及(ji)安規標準；電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的冷卻方式：自然冷卻或強制(zhi)風冷；電(dian)(dian)(dian)(dian)(dian)(dian)磁兼容(rong)標準。