穩(wen)(wen)壓(ya)電(dian)(dian)(dian)源在日(ri)常生產(chan)(chan)生活中起著非常重要的(de)(de)作用。與各種(zhong)電(dian)(dian)(dian)子(zi)(zi)設備(bei)中的(de)(de)內(nei)置電(dian)(dian)(dian)源相(xiang)比，DC穩(wen)(wen)壓(ya)電(dian)(dian)(dian)源具有(you)很大的(de)(de)優勢。電(dian)(dian)(dian)子(zi)(zi)設備(bei)中內(nei)置電(dian)(dian)(dian)源的(de)(de)不穩(wen)(wen)定(ding)放電(dian)(dian)(dian)會對電(dian)(dian)(dian)子(zi)(zi)設備(bei)產(chan)(chan)生一定(ding)的(de)(de)影響。穩(wen)(wen)壓(ya)電(dian)(dian)(dian)源是(shi)一種(zhong)能夠為負載提(ti)(ti)供穩(wen)(wen)定(ding)的(de)(de)交(jiao)流或DC電(dian)(dian)(dian)源的(de)(de)電(dian)(dian)(dian)子(zi)(zi)設備(bei)，包括交(jiao)流穩(wen)(wen)壓(ya)電(dian)(dian)(dian)源和DC穩(wen)(wen)壓(ya)電(dian)(dian)(dian)源。優點是(shi)增加(jia)放大環節，提(ti)(ti)高穩(wen)(wen)定(ding)性(xing)，輸(shu)出電(dian)(dian)(dian)壓(ya)可調;復合管(guan)作為調節管(guan)，增加(jia)輸(shu)出電(dian)(dian)(dian)流;增加(jia)保護電(dian)(dian)(dian)路，使電(dian)(dian)(dian)源安(an)全工作。

穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)路(lu):穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)(de)功能是使輸(shu)出(chu)的(de)(de)(de)(de)直流電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)穩(wen)定(ding)，不隨交流電(dian)(dian)(dian)(dian)網電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)和(he)負載的(de)(de)(de)(de)變化(hua)(hua)而變化(hua)(hua)。常(chang)(chang)用(yong)的(de)(de)(de)(de)集成(cheng)(cheng)穩(wen)壓(ya)(ya)(ya)器有(you)固定(ding)式三端(duan)(duan)穩(wen)壓(ya)(ya)(ya)器與可調(diao)式三端(duan)(duan)穩(wen)壓(ya)(ya)(ya)器。常(chang)(chang)用(yong)可調(diao)式正(zheng)壓(ya)(ya)(ya)集成(cheng)(cheng)穩(wen)壓(ya)(ya)(ya)器有(you)CW317(LM317)系(xi)列，它們的(de)(de)(de)(de)輸(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)從1.25V，37伏可調(diao)，并聯穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)路(lu)，簡的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)路(lu)外接元(yuan)件只需一個固定(ding)電(dian)(dian)(dian)(dian)阻和(he)一只電(dian)(dian)(dian)(dian)位器。其(qi)(qi)芯片內(nei)有(you)過渡、過熱和(he)安全工作(zuo)區保(bao)護，大(da)輸(shu)出(chu)電(dian)(dian)(dian)(dian)流為1.5A。其(qi)(qi)典型電(dian)(dian)(dian)(dian)路(lu)如(ru)下圖，其(qi)(qi)中電(dian)(dian)(dian)(dian)阻R1與電(dian)(dian)(dian)(dian)位器R2組成(cheng)(cheng)輸(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)調(diao)節器，輸(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)Uo的(de)(de)(de)(de)表達(da)式為:Uo，1.25(1，R2/R1)式中R1一般取120，240歐姆，輸(shu)出(chu)端(duan)(duan)與調(diao)整端(duan)(duan)的(de)(de)(de)(de)壓(ya)(ya)(ya)差(cha)為穩(wen)壓(ya)(ya)(ya)器的(de)(de)(de)(de)基準電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(典型值(zhi)為1.25V)。

許多入(ru)門級(ji)產品運(yun)用低成本的粗調/細調雙旋(xuan)鈕(niu)(niu)設(she)(she)(she)(she)定，遇到雙調理(li)旋(xuan)鈕(niu)(niu)，咱們先(xian)將細調旋(xuan)鈕(niu)(niu)旋(xuan)到中心方位(wei)，然后經(jing)過粗調旋(xuan)鈕(niu)(niu)設(she)(she)(she)(she)定大(da)致電(dian)(dian)壓(ya)(ya)，再(zai)用細調旋(xuan)鈕(niu)(niu)準確批改(gai)。設(she)(she)(she)(she)置電(dian)(dian)流(liu)(liu)。按(an)下(xia)電(dian)(dian)源(yuan)面(mian)板上“Limit”鍵不放(fang)，此刻電(dian)(dian)流(liu)(liu)表(biao)會顯現電(dian)(dian)流(liu)(liu)數值，調理(li)電(dian)(dian)流(liu)(liu)旋(xuan)鈕(niu)(niu)，使電(dian)(dian)流(liu)(liu)數值到達預訂水(shui)平。靠改(gai)變(bian)變(bian)壓(ya)(ya)器次、初級(ji)電(dian)(dian)壓(ya)(ya)的相位(wei)差，使輸(shu)出交流(liu)(liu)電(dian)(dian)壓(ya)(ya)穩(wen)定。晶閘(zha)管交流(liu)(liu)穩(wen)壓(ya)(ya)器。用晶閘(zha)管作功率調整元件。穩(wen)定度高、反應(ying)快(kuai)且無噪聲(sheng)。但對通信設(she)(she)(she)(she)備(bei)和電(dian)(dian)子設(she)(she)(she)(she)備(bei)造(zao)成干擾。'