嵌入式電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)設計(ji)的(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)為所有功(gong)(gong)能(neng)模塊提供能(neng)源(yuan)(yuan)，其效(xiao)(xiao)率(lv)和(he)功(gong)(gong)耗(hao)(hao)是(shi)(shi)反應(ying)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)設計(ji)成功(gong)(gong)與否的(de)絕dui標志(zhi)，故(gu)將穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)所涉及到的(de)知(zhi)識點梳(shu)理(li)總結以鞏固(gu)知(zhi)識點。在嵌入式系統設計(ji)中所使(shi)用(yong)均(jun)是(shi)(shi)小功(gong)(gong)率(lv)芯片，而諸如PC電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)等(deng)大(da)功(gong)(gong)率(lv)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)可(ke)以直接找專(zhuan)業(ye)開(kai)關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)廠商(shang)直接購買(mai)且開(kai)發難(nan)度非(fei)常大(da)只有專(zhuan)業(ye)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)工(gong)程師(shi)才能(neng)把握。常用(yong)直流穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)可(ke)分為線性穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)（俗稱LDO）和(he)開(kai)關(guan)(guan)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)。前者(zhe)調整元件(jian)工(gong)作于線性放大(da)區(qu)，通過連(lian)續(xu)的(de)電(dian)(dian)(dian)(dian)(dian)流所以其動態(tai)響應(ying)較好(hao)，但(dan)其功(gong)(gong)耗(hao)(hao)和(he)體積較大(da)轉換效(xiao)(xiao)率(lv)很低，一般進行(xing)降壓(ya)(ya)(ya)轉換處理(li)，使(shi)用(yong)在較敏感模擬電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。后者(zhe)體積和(he)功(gong)(gong)耗(hao)(hao)較小轉換效(xiao)(xiao)率(lv)高，但(dan)其電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)輸出紋波大(da)，動態(tai)響應(ying)差，可(ke)用(yong)于降壓(ya)(ya)(ya)或升壓(ya)(ya)(ya)轉換處理(li)。直流穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)使(shi)用(yong)方(fang)法。12v電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)和(he)5v電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)

開(kai)關(guan)整流(liu)(liu)(liu)器(qi)輔助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)一般工作(zuo)(zuo)原理(li)是輸(shu)(shu)入交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，將(jiang)其(qi)整流(liu)(liu)(liu)為(wei)(wei)高(gao)壓(ya)(ya)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，然后將(jiang)電(dian)(dian)(dian)(dian)(dian)路(lu)轉(zhuan)(zhuan)換(huan)為(wei)(wei)低(di)壓(ya)(ya)高(gao)頻方波(bo)(bo)，然后將(jiang)整流(liu)(liu)(liu)器(qi)濾波(bo)(bo)電(dian)(dian)(dian)(dian)(dian)路(lu)轉(zhuan)(zhuan)換(huan)為(wei)(wei)系統轉(zhuan)(zhuan)換(huan)為(wei)(wei)低(di)壓(ya)(ya)直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)所需的(de)(de)穩(wen)定(ding)(ding)性。電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)由(you)三(san)端穩(wen)壓(ya)(ya)器(qi)控(kong)制，直(zhi)流(liu)(liu)(liu)輸(shu)(shu)出(chu)為(wei)(wei)高(gao)頻轉(zhuan)(zhuan)換(huan)驅(qu)(qu)動(dong)脈(mo)沖控(kong)制環路(lu)提供電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)反(fan)饋信(xin)號。主功率(lv)轉(zhuan)(zhuan)換(huan)電(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)串聯電(dian)(dian)(dian)(dian)(dian)阻樣本用作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋信(xin)號，并(bing)且(qie)(qie)功率(lv)轉(zhuan)(zhuan)換(huan)管(guan)驅(qu)(qu)動(dong)脈(mo)沖由(you)控(kong)制芯片(例如UC3844)及其(qi)wai圍電(dian)(dian)(dian)(dian)(dian)路(lu)產(chan)生。　　可(ke)以看到，當交流(liu)(liu)(liu)輸(shu)(shu)入電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)低(di)且(qie)(qie)沒有電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋時輔助(zhu)(zhu)變壓(ya)(ya)器(qi)無(wu)法正常工作(zuo)(zuo)，波(bo)(bo)形(xing)的(de)(de)脈(mo)沖寬度不同，存(cun)在抖(dou)動(dong)，并(bing)且(qie)(qie)示波(bo)(bo)器(qi)無(wu)法穩(wen)定(ding)(ding)地捕獲(huo)波(bo)(bo)形(xing)。對于電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋，波(bo)(bo)形(xing)的(de)(de)脈(mo)沖寬度寬而(er)窄，占空比(bi)(bi)高(gao)達47%，而(er)UC3844的(de)(de)*'大(da)占空比(bi)(bi)jin為(wei)(wei)50%。增(zeng)加負載(zai)(zai)將(jiang)降低(di)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。　　在交流(liu)(liu)(liu)輸(shu)(shu)入的(de)(de)上限和下(xia)限電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)下(xia)穩(wen)定(ding)(ding)地操作(zuo)(zuo)輔助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，并(bing)且(qie)(qie)在從(cong)空轉(zhuan)(zhuan)到過(guo)載(zai)(zai)的(de)(de)整個負載(zai)(zai)范圍內(nei)，通常很難穩(wen)定(ding)(ding)地正常操作(zuo)(zuo)輔助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)。技術問題：功率(lv)器(qi)件的(de)(de)介電(dian)(dian)(dian)(dian)(dian)強度和過(guo)載(zai)(zai)能力，高(gao)頻變壓(ya)(ya)器(qi)的(de)(de)設(she)計(ji)，控(kong)制脈(mo)沖控(kong)制回(hui)路(lu)的(de)(de)參數選(xuan)擇。直(zhi)流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)使用直(zhi)流(liu)(liu)(liu)穩(wen)壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)時的(de)(de)注意(yi)事項！

當今(jin)的(de)(de)(de)智能(neng)(neng)開關電(dian)(dian)(dian)源(yuan)具(ju)有用于內(nei)部(bu)監視(shi)和(he)(he)(he)通(tong)信(xin)的(de)(de)(de)內(nei)部(bu)微處理器(qi)或DSP。微處理器(qi)芯片具(ju)有非常高的(de)(de)(de)功(gong)率要求，所需的(de)(de)(de)幅度非常穩定(ding)，更不用說會引起電(dian)(dian)(dian)磁干擾的(de)(de)(de)大尖峰和(he)(he)(he)毛刺，并(bing)且輔助(zhu)電(dian)(dian)(dian)源(yuan)的(de)(de)(de)交(jiao)(jiao)流(liu)適應(ying)性大于整(zheng)流(liu)器(qi)的(de)(de)(de)正常工(gong)作范(fan)圍必須寬泛。當整(zheng)流(liu)器(qi)連接到交(jiao)(jiao)流(liu)電(dian)(dian)(dian)源(yuan)時，監視(shi)部(bu)分必須首先正常運行，執行自檢(jian)和(he)(he)(he)各種條(tiao)件以查看整(zheng)流(liu)器(qi)是否可以打開。如果交(jiao)(jiao)流(liu)電(dian)(dian)(dian)壓(ya)過(guo)(guo)高或過(guo)(guo)低(di)，整(zheng)流(liu)器(qi)將停止工(gong)作。但是，監視(shi)部(bu)分必須繼續正常運行，并(bing)保持正常的(de)(de)(de)監視(shi)和(he)(he)(he)通(tong)信(xin)。在操作過(guo)(guo)程中，某些電(dian)(dian)(dian)源(yuan)產(chan)品出現無緣無故(gu)復(fu)位情況，對大容(rong)量開關電(dian)(dian)(dian)源(yuan)輔助(zhu)電(dian)(dian)(dian)源(yuan)的(de)(de)(de)設計(ji)分析表明，該輔助(zhu)電(dian)(dian)(dian)源(yuan)在不同的(de)(de)(de)交(jiao)(jiao)流(liu)輸入電(dian)(dian)(dian)壓(ya)和(he)(he)(he)不同的(de)(de)(de)負載(zai)條(tiao)件下存在很多問題(ti)。常見問題(ti)有交(jiao)(jiao)流(liu)適應(ying)范(fan)圍，低(di)負載(zai)能(neng)(neng)力(li)，工(gong)作波形不穩定(ding)、不對稱(cheng)的(de)(de)(de)情況，磁偏置，嚴(yan)重的(de)(de)(de)電(dian)(dian)(dian)磁干擾等(deng)。

開關(guan)整(zheng)流(liu)器輔(fu)(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)的(de)(de)一般工作(zuo)原(yuan)理是(shi)輸(shu)入交(jiao)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，將(jiang)其整(zheng)流(liu)為高(gao)壓(ya)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，然(ran)后將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)為低壓(ya)高(gao)頻(pin)方波，然(ran)后將(jiang)整(zheng)流(liu)器濾波電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)為系(xi)統轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)為低壓(ya)直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)所需的(de)(de)穩定性。電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)由三端穩壓(ya)器控制，直(zhi)(zhi)流(liu)輸(shu)出為高(gao)頻(pin)轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)驅動脈(mo)沖(chong)控制環路(lu)提供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)反(fan)饋信(xin)號(hao)。主功率轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中的(de)(de)串聯電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)樣(yang)本用(yong)作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)反(fan)饋信(xin)號(hao)，并(bing)且功率轉(zhuan)(zhuan)(zhuan)(zhuan)換(huan)(huan)管驅動脈(mo)沖(chong)由控制芯片(例如UC3844)及其wai圍(wei)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)產生(sheng)。　　(注意：交(jiao)流(liu)低壓(ya)是(shi)輔(fu)(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)開始工作(zuo)時的(de)(de)*小輸(shu)入電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)測量值。)　　在(zai)交(jiao)流(liu)輸(shu)入的(de)(de)上限和(he)下限電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下穩定地(di)(di)操(cao)作(zuo)輔(fu)(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，并(bing)且在(zai)從空轉(zhuan)(zhuan)(zhuan)(zhuan)到過載(zai)的(de)(de)整(zheng)個負載(zai)范圍(wei)內，通常(chang)很難穩定地(di)(di)正常(chang)操(cao)作(zuo)輔(fu)(fu)助(zhu)(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)。技術問題：功率器件的(de)(de)介電(dian)(dian)(dian)(dian)(dian)(dian)強度和(he)過載(zai)能力。高(gao)頻(pin)變(bian)壓(ya)器的(de)(de)設計(ji)。控制脈(mo)沖(chong)控制回路(lu)的(de)(de)參數選擇。直(zhi)(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)技術的(de)(de)發展現狀(zhuang)及應用(yong)。

開關整(zheng)流(liu)(liu)(liu)(liu)器(qi)輔(fu)助電(dian)(dian)(dian)源的(de)(de)(de)(de)一般工(gong)作(zuo)原(yuan)理是輸(shu)入(ru)交流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源，將(jiang)其整(zheng)流(liu)(liu)(liu)(liu)為(wei)(wei)(wei)高壓(ya)(ya)直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源，然后(hou)將(jiang)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)轉(zhuan)(zhuan)換(huan)為(wei)(wei)(wei)低壓(ya)(ya)高頻(pin)方波(bo)，然后(hou)將(jiang)整(zheng)流(liu)(liu)(liu)(liu)器(qi)濾波(bo)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)轉(zhuan)(zhuan)換(huan)為(wei)(wei)(wei)系(xi)統轉(zhuan)(zhuan)換(huan)為(wei)(wei)(wei)低壓(ya)(ya)直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源所需的(de)(de)(de)(de)穩(wen)定性。電(dian)(dian)(dian)壓(ya)(ya)由(you)三端(duan)穩(wen)壓(ya)(ya)器(qi)控(kong)(kong)制(zhi)(zhi)直流(liu)(liu)(liu)(liu)輸(shu)出為(wei)(wei)(wei)高頻(pin)轉(zhuan)(zhuan)換(huan)驅動(dong)(dong)脈沖(chong)(chong)控(kong)(kong)制(zhi)(zhi)環路(lu)(lu)(lu)(lu)提供電(dian)(dian)(dian)壓(ya)(ya)反饋信號。主功率轉(zhuan)(zhuan)換(huan)電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)中的(de)(de)(de)(de)串聯電(dian)(dian)(dian)阻樣本用作(zuo)電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)反饋信號，并(bing)(bing)(bing)且(qie)功率轉(zhuan)(zhuan)換(huan)管驅動(dong)(dong)脈沖(chong)(chong)由(you)控(kong)(kong)制(zhi)(zhi)芯片(例如(ru)UC3844)及其wai圍電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)產生(sheng)。　　可以看到，當交流(liu)(liu)(liu)(liu)輸(shu)入(ru)電(dian)(dian)(dian)壓(ya)(ya)低且(qie)沒有電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)反饋時，輔(fu)助變(bian)壓(ya)(ya)器(qi)無(wu)法正常(chang)(chang)工(gong)作(zuo)，波(bo)形(xing)的(de)(de)(de)(de)脈沖(chong)(chong)寬度不同，存在抖動(dong)(dong)，并(bing)(bing)(bing)且(qie)示(shi)波(bo)器(qi)無(wu)法穩(wen)定地(di)捕獲波(bo)形(xing)。對于電(dian)(dian)(dian)流(liu)(liu)(liu)(liu)反饋，波(bo)形(xing)的(de)(de)(de)(de)脈沖(chong)(chong)寬度寬而窄，占(zhan)空比(bi)高達(da)47%，而UC3844的(de)(de)(de)(de)*'大占(zhan)空比(bi)jin為(wei)(wei)(wei)50%。增加(jia)負載將(jiang)降低輸(shu)出電(dian)(dian)(dian)壓(ya)(ya)。　　在交流(liu)(liu)(liu)(liu)輸(shu)入(ru)的(de)(de)(de)(de)上限和下限電(dian)(dian)(dian)壓(ya)(ya)下穩(wen)定地(di)操作(zuo)輔(fu)助電(dian)(dian)(dian)源，并(bing)(bing)(bing)且(qie)在從空轉(zhuan)(zhuan)到過(guo)載的(de)(de)(de)(de)整(zheng)個負載范圍內，通常(chang)(chang)很難穩(wen)定地(di)正常(chang)(chang)操作(zuo)輔(fu)助電(dian)(dian)(dian)源。技(ji)術(shu)問(wen)題(ti)：功率器(qi)件(jian)的(de)(de)(de)(de)介電(dian)(dian)(dian)強度和過(guo)載能(neng)力，高頻(pin)變(bian)壓(ya)(ya)器(qi)的(de)(de)(de)(de)設計(ji)，控(kong)(kong)制(zhi)(zhi)脈沖(chong)(chong)控(kong)(kong)制(zhi)(zhi)回路(lu)(lu)(lu)(lu)的(de)(de)(de)(de)參數選擇。怎樣為(wei)(wei)(wei)自(zi)動(dong)(dong)化測試系(xi)統選擇合適(shi)的(de)(de)(de)(de)直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源？直流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)源電(dian)(dian)(dian)路(lu)(lu)(lu)(lu)

電源技術中的分析關(guan)于(yu)高(gao)壓直流電源控制系統的研究。12v電源和5v電源

嵌(qian)入式(shi)電(dian)(dian)(dian)路設(she)計(ji)(ji)的(de)(de)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)為所有(you)功(gong)(gong)(gong)能(neng)模塊提供(gong)能(neng)源(yuan)(yuan)(yuan)其效(xiao)率(lv)(lv)和(he)功(gong)(gong)(gong)耗是反應(ying)電(dian)(dian)(dian)路設(she)計(ji)(ji)成功(gong)(gong)(gong)與(yu)否(fou)的(de)(de)絕dui標志(zhi)，故將穩壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)所涉及到的(de)(de)知(zhi)識(shi)點梳理總結以鞏固知(zhi)識(shi)點。在嵌(qian)入式(shi)系統設(she)計(ji)(ji)中(zhong)所使用(yong)均(jun)是小(xiao)功(gong)(gong)(gong)率(lv)(lv)芯片，而諸如PC電(dian)(dian)(dian)源(yuan)(yuan)(yuan)等大(da)(da)(da)功(gong)(gong)(gong)率(lv)(lv)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)以直接找(zhao)專業(ye)(ye)開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)(yuan)廠商直接購(gou)買，且開(kai)發難度非常大(da)(da)(da)只有(you)專業(ye)(ye)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)工程師才(cai)能(neng)把握。常用(yong)直流(liu)穩壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)分為線性穩壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)（俗稱LDO）和(he)開(kai)關穩壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)。前者調整(zheng)元件(jian)工作(zuo)于(yu)線性放大(da)(da)(da)區，通(tong)過連續(xu)的(de)(de)電(dian)(dian)(dian)流(liu)所以其動態(tai)響(xiang)應(ying)較(jiao)好但其功(gong)(gong)(gong)耗和(he)體積(ji)較(jiao)大(da)(da)(da)轉換(huan)效(xiao)率(lv)(lv)很低一般進行降壓(ya)(ya)轉換(huan)處理，使用(yong)在較(jiao)敏感模擬電(dian)(dian)(dian)路。后(hou)者體積(ji)和(he)功(gong)(gong)(gong)耗較(jiao)小(xiao)轉換(huan)效(xiao)率(lv)(lv)高，但其電(dian)(dian)(dian)壓(ya)(ya)輸出紋波(bo)大(da)(da)(da)，動態(tai)響(xiang)應(ying)差，可(ke)用(yong)于(yu)降壓(ya)(ya)或升壓(ya)(ya)轉換(huan)處理。12v電(dian)(dian)(dian)源(yuan)(yuan)(yuan)和(he)5v電(dian)(dian)(dian)源(yuan)(yuan)(yuan)

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