開關整(zheng)(zheng)流(liu)(liu)(liu)器(qi)輔(fu)助電(dian)(dian)(dian)(dian)源的一般工(gong)作原(yuan)理是輸(shu)(shu)入(ru)(ru)交流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源，將(jiang)(jiang)其整(zheng)(zheng)流(liu)(liu)(liu)為(wei)(wei)高(gao)(gao)壓(ya)直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源，然(ran)后(hou)(hou)將(jiang)(jiang)電(dian)(dian)(dian)(dian)路(lu)轉換(huan)為(wei)(wei)低壓(ya)高(gao)(gao)頻方波(bo)，然(ran)后(hou)(hou)將(jiang)(jiang)整(zheng)(zheng)流(liu)(liu)(liu)器(qi)濾(lv)波(bo)電(dian)(dian)(dian)(dian)路(lu)轉換(huan)為(wei)(wei)系統轉換(huan)為(wei)(wei)低壓(ya)直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源所需的穩定性。電(dian)(dian)(dian)(dian)壓(ya)由(you)三端(duan)穩壓(ya)器(qi)控(kong)制，直流(liu)(liu)(liu)輸(shu)(shu)出(chu)(chu)為(wei)(wei)高(gao)(gao)頻轉換(huan)驅動(dong)脈沖(chong)(chong)控(kong)制環路(lu)提供電(dian)(dian)(dian)(dian)壓(ya)反(fan)饋(kui)(kui)信號主(zhu)功率(lv)轉換(huan)電(dian)(dian)(dian)(dian)路(lu)中的串聯(lian)電(dian)(dian)(dian)(dian)阻樣本(ben)用作電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋(kui)(kui)信號，并(bing)且(qie)(qie)功率(lv)轉換(huan)管驅動(dong)脈沖(chong)(chong)由(you)控(kong)制芯片(例如UC3844)及(ji)其wai圍電(dian)(dian)(dian)(dian)路(lu)產生。　　可以看(kan)到，當交流(liu)(liu)(liu)輸(shu)(shu)入(ru)(ru)電(dian)(dian)(dian)(dian)壓(ya)低且(qie)(qie)沒有電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋(kui)(kui)時，輔(fu)助變(bian)壓(ya)器(qi)無法正常(chang)工(gong)作，波(bo)形(xing)的脈沖(chong)(chong)寬度(du)不同(tong)，存在(zai)(zai)抖動(dong)，并(bing)且(qie)(qie)示(shi)波(bo)器(qi)無法穩定地(di)捕獲波(bo)形(xing)。對于電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)反(fan)饋(kui)(kui)，波(bo)形(xing)的脈沖(chong)(chong)寬度(du)寬而窄，占(zhan)空(kong)比(bi)高(gao)(gao)達(da)47%，而UC3844的*'大(da)占(zhan)空(kong)比(bi)jin為(wei)(wei)50%。增加(jia)負載將(jiang)(jiang)降低輸(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)。　　在(zai)(zai)交流(liu)(liu)(liu)輸(shu)(shu)入(ru)(ru)的上(shang)限和下(xia)限電(dian)(dian)(dian)(dian)壓(ya)下(xia)穩定地(di)操(cao)作輔(fu)助電(dian)(dian)(dian)(dian)源，并(bing)且(qie)(qie)在(zai)(zai)從空(kong)轉到過載的整(zheng)(zheng)個(ge)負載范圍內，通(tong)常(chang)很難穩定地(di)正常(chang)操(cao)作輔(fu)助電(dian)(dian)(dian)(dian)源。技術問題：功率(lv)器(qi)件(jian)的介(jie)電(dian)(dian)(dian)(dian)強度(du)和過載能力，高(gao)(gao)頻變(bian)壓(ya)器(qi)的設計，控(kong)制脈沖(chong)(chong)控(kong)制回路(lu)的參數選擇。直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源的重(zhong)要部件(jian)組(zu)成。直流(liu)(liu)(liu)電(dian)(dian)(dian)(dian)源有那些

嵌入(ru)式電路設計的(de)(de)(de)電源(yuan)為(wei)所(suo)有功(gong)(gong)(gong)能模塊(kuai)提供(gong)能源(yuan)，其(qi)效(xiao)率(lv)(lv)和(he)功(gong)(gong)(gong)耗(hao)(hao)是(shi)反(fan)應(ying)電路設計成功(gong)(gong)(gong)與否的(de)(de)(de)絕dui標(biao)志(zhi)，故將穩(wen)(wen)(wen)壓電源(yuan)所(suo)涉及(ji)到的(de)(de)(de)知(zhi)(zhi)識(shi)點梳理總(zong)結以鞏(gong)固(gu)知(zhi)(zhi)識(shi)點。在(zai)嵌入(ru)式系統設計中所(suo)使(shi)用(yong)(yong)均(jun)是(shi)小功(gong)(gong)(gong)率(lv)(lv)芯片(pian)，而諸如(ru)PC電源(yuan)等(deng)大功(gong)(gong)(gong)率(lv)(lv)電源(yuan)可以直(zhi)(zhi)(zhi)接找專(zhuan)業開關電源(yuan)廠商直(zhi)(zhi)(zhi)接購買，且(qie)開發難度非常大只有專(zhuan)業電源(yuan)工程師才(cai)能把握。常用(yong)(yong)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)穩(wen)(wen)(wen)壓電源(yuan)可分為(wei)線性穩(wen)(wen)(wen)壓電源(yuan)（俗(su)稱LDO）和(he)開關穩(wen)(wen)(wen)壓電源(yuan)前者(zhe)調整元件工作(zuo)于(yu)線性放(fang)大區，通過連續(xu)的(de)(de)(de)電流(liu)(liu)(liu)所(suo)以其(qi)動態響(xiang)應(ying)較好，但(dan)其(qi)功(gong)(gong)(gong)耗(hao)(hao)和(he)體積較大轉(zhuan)換(huan)效(xiao)率(lv)(lv)很低，一般進行(xing)降(jiang)壓轉(zhuan)換(huan)處理，使(shi)用(yong)(yong)在(zai)較敏感模擬電路。后(hou)者(zhe)體積和(he)功(gong)(gong)(gong)耗(hao)(hao)較小轉(zhuan)換(huan)效(xiao)率(lv)(lv)高，但(dan)其(qi)電壓輸(shu)出紋波大，動態響(xiang)應(ying)差，可用(yong)(yong)于(yu)降(jiang)壓或升(sheng)壓轉(zhuan)換(huan)處理。直(zhi)(zhi)(zhi)流(liu)(liu)(liu)電源(yuan)線路直(zhi)(zhi)(zhi)流(liu)(liu)(liu)電源(yuan)技術的(de)(de)(de)發展現狀(zhuang)及(ji)應(ying)用(yong)(yong)。

當今的(de)(de)(de)智能(neng)開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)具(ju)有用(yong)于(yu)(yu)內部(bu)監(jian)視(shi)和通信的(de)(de)(de)內部(bu)微處(chu)理器(qi)或DSP。微處(chu)理器(qi)芯(xin)片具(ju)有非常(chang)(chang)(chang)(chang)高的(de)(de)(de)功率要求，所需(xu)的(de)(de)(de)幅(fu)度(du)非常(chang)(chang)(chang)(chang)穩定，更不(bu)用(yong)說會引(yin)起(qi)電(dian)(dian)(dian)磁干(gan)擾的(de)(de)(de)大(da)尖峰和毛刺，并且輔助電(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)交(jiao)流(liu)適(shi)應性大(da)于(yu)(yu)整(zheng)流(liu)器(qi)的(de)(de)(de)正(zheng)(zheng)常(chang)(chang)(chang)(chang)工(gong)作范(fan)圍必(bi)須(xu)寬泛(fan)。當整(zheng)流(liu)器(qi)連接到交(jiao)流(liu)電(dian)(dian)(dian)源(yuan)(yuan)時(shi)，監(jian)視(shi)部(bu)分(fen)必(bi)須(xu)首(shou)先(xian)正(zheng)(zheng)常(chang)(chang)(chang)(chang)運行，執行自檢(jian)和各(ge)種條件以查看整(zheng)流(liu)器(qi)是否(fou)可以打開(kai)。如果交(jiao)流(liu)電(dian)(dian)(dian)壓(ya)過(guo)高或過(guo)低(di)，整(zheng)流(liu)器(qi)將(jiang)停止工(gong)作。但(dan)是，監(jian)視(shi)部(bu)分(fen)必(bi)須(xu)繼續正(zheng)(zheng)常(chang)(chang)(chang)(chang)運行，并保持正(zheng)(zheng)常(chang)(chang)(chang)(chang)的(de)(de)(de)監(jian)視(shi)和通信。在(zai)操作過(guo)程中，某(mou)些電(dian)(dian)(dian)源(yuan)(yuan)產(chan)品出(chu)現無(wu)緣(yuan)無(wu)故復位情(qing)況。對大(da)容量開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)輔助電(dian)(dian)(dian)源(yuan)(yuan)的(de)(de)(de)設計(ji)分(fen)析表明(ming)，該輔助電(dian)(dian)(dian)源(yuan)(yuan)在(zai)不(bu)同的(de)(de)(de)交(jiao)流(liu)輸(shu)入電(dian)(dian)(dian)壓(ya)和不(bu)同的(de)(de)(de)負載條件下存在(zai)很多問題(ti)。常(chang)(chang)(chang)(chang)見問題(ti)有交(jiao)流(liu)適(shi)應范(fan)圍，低(di)負載能(neng)力，工(gong)作波形不(bu)穩定、不(bu)對稱的(de)(de)(de)情(qing)況，磁偏置，嚴重的(de)(de)(de)電(dian)(dian)(dian)磁干(gan)擾等

嵌入式電(dian)路(lu)(lu)設計(ji)(ji)的電(dian)源(yuan)(yuan)(yuan)為所有功(gong)能(neng)模塊(kuai)提供(gong)能(neng)源(yuan)(yuan)(yuan)，其(qi)(qi)效(xiao)(xiao)率(lv)和功(gong)耗是反應電(dian)路(lu)(lu)設計(ji)(ji)成功(gong)與(yu)否(fou)的絕(jue)dui標志故將穩壓(ya)電(dian)源(yuan)(yuan)(yuan)所涉及(ji)到(dao)的知識(shi)點梳(shu)理總結(jie)以(yi)鞏固知識(shi)點。在嵌入式系統設計(ji)(ji)中(zhong)所使(shi)用(yong)均是小(xiao)功(gong)率(lv)芯片(pian)，而諸如PC電(dian)源(yuan)(yuan)(yuan)等(deng)大功(gong)率(lv)電(dian)源(yuan)(yuan)(yuan)可(ke)以(yi)直(zhi)接找專(zhuan)業(ye)(ye)開(kai)關(guan)電(dian)源(yuan)(yuan)(yuan)廠商直(zhi)接購(gou)買(mai)，且開(kai)發難(nan)度非常大只(zhi)有專(zhuan)業(ye)(ye)電(dian)源(yuan)(yuan)(yuan)工(gong)程師(shi)才能(neng)把握(wo)。常用(yong)直(zhi)流(liu)穩壓(ya)電(dian)源(yuan)(yuan)(yuan)可(ke)分為線(xian)性(xing)穩壓(ya)電(dian)源(yuan)(yuan)(yuan)（俗稱LDO）和開(kai)關(guan)穩壓(ya)電(dian)源(yuan)(yuan)(yuan)。前(qian)者(zhe)調整(zheng)元件工(gong)作于線(xian)性(xing)放大區，通過連續的電(dian)流(liu)所以(yi)其(qi)(qi)動態響應較(jiao)好但(dan)其(qi)(qi)功(gong)耗和體積(ji)較(jiao)大轉(zhuan)換(huan)效(xiao)(xiao)率(lv)很低，一般進(jin)行降(jiang)壓(ya)轉(zhuan)換(huan)處理，使(shi)用(yong)在較(jiao)敏感模擬電(dian)路(lu)(lu)。后者(zhe)體積(ji)和功(gong)耗較(jiao)小(xiao)轉(zhuan)換(huan)效(xiao)(xiao)率(lv)高(gao)，但(dan)其(qi)(qi)電(dian)壓(ya)輸出紋波(bo)大，動態響應差，可(ke)用(yong)于降(jiang)壓(ya)或升壓(ya)轉(zhuan)換(huan)處理。直(zhi)流(liu)電(dian)源(yuan)(yuan)(yuan)的性(xing)能(neng)強弱(ruo)怎么區分。

當今(jin)的(de)(de)(de)智能開關(guan)電(dian)(dian)源(yuan)(yuan)具有(you)用(yong)于內部監視和(he)通信(xin)的(de)(de)(de)內部微(wei)處(chu)理器(qi)(qi)或DSP。微(wei)處(chu)理器(qi)(qi)芯片具有(you)非常(chang)(chang)(chang)高的(de)(de)(de)功率要求，所需的(de)(de)(de)幅(fu)度非常(chang)(chang)(chang)穩定(ding)更(geng)不用(yong)說會引起電(dian)(dian)磁干擾(rao)的(de)(de)(de)大(da)尖(jian)峰和(he)毛刺，并且輔(fu)助電(dian)(dian)源(yuan)(yuan)的(de)(de)(de)交流(liu)(liu)適(shi)應(ying)性大(da)于整流(liu)(liu)器(qi)(qi)的(de)(de)(de)正常(chang)(chang)(chang)工作(zuo)范圍(wei)必(bi)(bi)須寬泛，當整流(liu)(liu)器(qi)(qi)連接到交流(liu)(liu)電(dian)(dian)源(yuan)(yuan)時(shi)，監視部分(fen)必(bi)(bi)須首先正常(chang)(chang)(chang)運(yun)行(xing)，執行(xing)自檢和(he)各種條件(jian)以查看整流(liu)(liu)器(qi)(qi)是(shi)否可以打開。如(ru)果(guo)交流(liu)(liu)電(dian)(dian)壓(ya)(ya)(ya)過(guo)(guo)高或過(guo)(guo)低(di)，整流(liu)(liu)器(qi)(qi)將停止工作(zuo)。但是(shi)，監視部分(fen)必(bi)(bi)須繼續正常(chang)(chang)(chang)運(yun)行(xing)，并保持(chi)正常(chang)(chang)(chang)的(de)(de)(de)監視和(he)通信(xin)。在(zai)操作(zuo)過(guo)(guo)程中某些電(dian)(dian)源(yuan)(yuan)產品出現無緣無故復(fu)位(wei)情(qing)況。對大(da)容量開關(guan)電(dian)(dian)源(yuan)(yuan)輔(fu)助電(dian)(dian)源(yuan)(yuan)的(de)(de)(de)設計(ji)分(fen)析表(biao)明，該輔(fu)助電(dian)(dian)源(yuan)(yuan)在(zai)不同的(de)(de)(de)交流(liu)(liu)輸入電(dian)(dian)壓(ya)(ya)(ya)和(he)不同的(de)(de)(de)負(fu)載條件(jian)下存在(zai)很多問(wen)題。常(chang)(chang)(chang)見問(wen)題有(you)交流(liu)(liu)適(shi)應(ying)范圍(wei)，低(di)負(fu)載能力，工作(zuo)波形(xing)不穩定(ding)、不對稱的(de)(de)(de)情(qing)況，磁偏置，嚴(yan)重的(de)(de)(de)電(dian)(dian)磁干擾(rao)等。高壓(ya)(ya)(ya)直流(liu)(liu)電(dian)(dian)源(yuan)(yuan)技術的(de)(de)(de)發展現狀及(ji)應(ying)用(yong)？外控直流(liu)(liu)電(dian)(dian)源(yuan)(yuan)

電源(yuan)技術中的(de)分析關于高壓(ya)直(zhi)流電源(yuan)控制系統的(de)研究。直(zhi)流電源(yuan)有(you)那(nei)些

嵌入(ru)式(shi)電(dian)(dian)(dian)(dian)路(lu)設計的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)為所(suo)有功(gong)能(neng)模塊提供能(neng)源(yuan)，其效率(lv)和(he)功(gong)耗是反應電(dian)(dian)(dian)(dian)路(lu)設計成功(gong)與否(fou)的(de)(de)絕dui標志，故(gu)將穩(wen)壓電(dian)(dian)(dian)(dian)源(yuan)所(suo)涉及到的(de)(de)知識(shi)點梳(shu)理(li)總(zong)結以(yi)(yi)鞏固知識(shi)點。在嵌入(ru)式(shi)系統設計中(zhong)所(suo)使用(yong)均(jun)是小功(gong)率(lv)芯片，而(er)諸如PC電(dian)(dian)(dian)(dian)源(yuan)等大功(gong)率(lv)電(dian)(dian)(dian)(dian)源(yuan)可以(yi)(yi)直接找(zhao)專業開(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)廠(chang)商直接購買，且開(kai)發難度非(fei)常(chang)大只有專業電(dian)(dian)(dian)(dian)源(yuan)工程師才能(neng)把握。常(chang)用(yong)直流(liu)(liu)穩(wen)壓電(dian)(dian)(dian)(dian)源(yuan)可分為線性(xing)穩(wen)壓電(dian)(dian)(dian)(dian)源(yuan)（俗稱LDO）和(he)開(kai)關(guan)穩(wen)壓電(dian)(dian)(dian)(dian)源(yuan)。前者(zhe)調整元件工作于線性(xing)放大區，通過連續的(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)所(suo)以(yi)(yi)其動態響(xiang)應較好(hao)，但其功(gong)耗和(he)體(ti)積較大轉換(huan)效率(lv)很(hen)低，一般進(jin)行降(jiang)(jiang)壓轉換(huan)處(chu)理(li)，使用(yong)在較敏(min)感模擬電(dian)(dian)(dian)(dian)路(lu)。后者(zhe)體(ti)積和(he)功(gong)耗較小轉換(huan)效率(lv)高，但其電(dian)(dian)(dian)(dian)壓輸出(chu)紋(wen)波大，動態響(xiang)應差，可用(yong)于降(jiang)(jiang)壓或(huo)升壓轉換(huan)處(chu)理(li)。直流(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)有那(nei)些

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