嵌入(ru)式電(dian)(dian)路(lu)設計的(de)電(dian)(dian)源(yuan)(yuan)為所(suo)有功(gong)(gong)能模塊提供能源(yuan)(yuan)，其效率(lv)(lv)和功(gong)(gong)耗是反應電(dian)(dian)路(lu)設計成功(gong)(gong)與否(fou)的(de)絕(jue)dui標志，故(gu)將穩(wen)壓電(dian)(dian)源(yuan)(yuan)所(suo)涉及到的(de)知(zhi)識(shi)點(dian)梳理(li)總(zong)結以鞏(gong)固知(zhi)識(shi)點(dian)。在(zai)嵌入(ru)式系統設計中所(suo)使(shi)用(yong)均是小功(gong)(gong)率(lv)(lv)芯片，而諸(zhu)如PC電(dian)(dian)源(yuan)(yuan)等大(da)(da)(da)功(gong)(gong)率(lv)(lv)電(dian)(dian)源(yuan)(yuan)可以直(zhi)(zhi)接找專(zhuan)業開關(guan)電(dian)(dian)源(yuan)(yuan)廠商直(zhi)(zhi)接購買(mai)，且開發難度(du)非(fei)常大(da)(da)(da)只有專(zhuan)業電(dian)(dian)源(yuan)(yuan)工(gong)程師才能把握。常用(yong)直(zhi)(zhi)流穩(wen)壓電(dian)(dian)源(yuan)(yuan)可分為線(xian)性(xing)穩(wen)壓電(dian)(dian)源(yuan)(yuan)（俗稱LDO）和開關(guan)穩(wen)壓電(dian)(dian)源(yuan)(yuan)。前者調(diao)整元(yuan)件工(gong)作于(yu)線(xian)性(xing)放(fang)大(da)(da)(da)區通過連續的(de)電(dian)(dian)流所(suo)以其動(dong)態響應較好，但其功(gong)(gong)耗和體積較大(da)(da)(da)轉(zhuan)(zhuan)換效率(lv)(lv)很低，一般進(jin)行降壓轉(zhuan)(zhuan)換處(chu)理(li)，使(shi)用(yong)在(zai)較敏感模擬電(dian)(dian)路(lu)。后者體積和功(gong)(gong)耗較小轉(zhuan)(zhuan)換效率(lv)(lv)高，但其電(dian)(dian)壓輸出紋波(bo)大(da)(da)(da)，動(dong)態響應差，可用(yong)于(yu)降壓或升壓轉(zhuan)(zhuan)換處(chu)理(li)。什么(me)是直(zhi)(zhi)流電(dian)(dian)源(yuan)(yuan)，直(zhi)(zhi)流電(dian)(dian)源(yuan)(yuan)的(de)工(gong)作原理(li)。RP7936A直(zhi)(zhi)流電(dian)(dian)源(yuan)(yuan)

嵌入(ru)式電(dian)(dian)(dian)(dian)路(lu)(lu)設(she)計(ji)(ji)的電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)為所有(you)功能模塊提供能源(yuan)(yuan)(yuan)(yuan)，其效率(lv)和功耗(hao)是反應(ying)電(dian)(dian)(dian)(dian)路(lu)(lu)設(she)計(ji)(ji)成功與否(fou)的絕dui標志。故將穩(wen)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)所涉(she)及到的知識(shi)點梳理總結(jie)以鞏固知識(shi)點。在(zai)嵌入(ru)式系統設(she)計(ji)(ji)中所使用(yong)均是小(xiao)功率(lv)芯(xin)片。而諸如(ru)PC電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)等大(da)(da)功率(lv)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可(ke)以直(zhi)接(jie)(jie)找專業開(kai)關電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)廠商直(zhi)接(jie)(jie)購買(mai)，且開(kai)發(fa)難度非常大(da)(da)只(zhi)有(you)專業電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)工程(cheng)師才(cai)能把握。常用(yong)直(zhi)流(liu)穩(wen)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可(ke)分為線性(xing)穩(wen)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)（俗(su)稱LDO）和開(kai)關穩(wen)壓(ya)(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)。前(qian)者(zhe)調整元件工作于線性(xing)放大(da)(da)區，通過連續(xu)的電(dian)(dian)(dian)(dian)流(liu)所以其動(dong)態(tai)(tai)響(xiang)應(ying)較好，但其功耗(hao)和體積較大(da)(da)轉(zhuan)(zhuan)換(huan)效率(lv)很低(di)，一般進行降(jiang)(jiang)壓(ya)(ya)(ya)(ya)轉(zhuan)(zhuan)換(huan)處理，使用(yong)在(zai)較敏感模擬電(dian)(dian)(dian)(dian)路(lu)(lu)。后者(zhe)體積和功耗(hao)較小(xiao)轉(zhuan)(zhuan)換(huan)效率(lv)高，但其電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)輸(shu)出紋(wen)波(bo)大(da)(da)，動(dong)態(tai)(tai)響(xiang)應(ying)差，可(ke)用(yong)于降(jiang)(jiang)壓(ya)(ya)(ya)(ya)或(huo)升壓(ya)(ya)(ya)(ya)轉(zhuan)(zhuan)換(huan)處理。RP7936A直(zhi)流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)交流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)和直(zhi)流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的區別有(you)哪些不同.

嵌(qian)入式電(dian)(dian)(dian)路(lu)設計(ji)的電(dian)(dian)(dian)源(yuan)(yuan)(yuan)為所(suo)有功(gong)能模塊(kuai)提供(gong)能源(yuan)(yuan)(yuan)其(qi)(qi)(qi)效率和(he)(he)功(gong)耗是反應電(dian)(dian)(dian)路(lu)設計(ji)成功(gong)與否的絕dui標(biao)志(zhi)，故將穩(wen)壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)所(suo)涉及到的知識(shi)點梳理(li)總(zong)結(jie)以(yi)鞏固(gu)知識(shi)點。在嵌(qian)入式系統設計(ji)中(zhong)所(suo)使用(yong)均是小(xiao)功(gong)率芯片(pian)，而諸如PC電(dian)(dian)(dian)源(yuan)(yuan)(yuan)等大功(gong)率電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可以(yi)直接找專業開(kai)關電(dian)(dian)(dian)源(yuan)(yuan)(yuan)廠(chang)商(shang)直接購買，且開(kai)發(fa)難度非常(chang)大只有專業電(dian)(dian)(dian)源(yuan)(yuan)(yuan)工程師(shi)才(cai)能把握。常(chang)用(yong)直流穩(wen)壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可分為線性穩(wen)壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)（俗稱LDO）和(he)(he)開(kai)關穩(wen)壓(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)。前者(zhe)調整元件工作(zuo)于線性放(fang)大區，通過連續的電(dian)(dian)(dian)流所(suo)以(yi)其(qi)(qi)(qi)動(dong)態(tai)響應較(jiao)好(hao)但其(qi)(qi)(qi)功(gong)耗和(he)(he)體(ti)積較(jiao)大轉換效率很低(di)一般進行降壓(ya)(ya)轉換處(chu)理(li)，使用(yong)在較(jiao)敏感模擬電(dian)(dian)(dian)路(lu)。后者(zhe)體(ti)積和(he)(he)功(gong)耗較(jiao)小(xiao)轉換效率高，但其(qi)(qi)(qi)電(dian)(dian)(dian)壓(ya)(ya)輸出紋(wen)波大，動(dong)態(tai)響應差，可用(yong)于降壓(ya)(ya)或升壓(ya)(ya)轉換處(chu)理(li)。

開關整(zheng)流(liu)(liu)(liu)器(qi)(qi)輔助(zhu)電(dian)(dian)源(yuan)的(de)一般(ban)工作原理(li)是輸入(ru)交(jiao)(jiao)流(liu)(liu)(liu)電(dian)(dian)源(yuan)，將其整(zheng)流(liu)(liu)(liu)為(wei)(wei)高(gao)(gao)壓(ya)(ya)直(zhi)流(liu)(liu)(liu)電(dian)(dian)源(yuan)，然后(hou)將電(dian)(dian)路(lu)(lu)轉(zhuan)換(huan)(huan)為(wei)(wei)低壓(ya)(ya)高(gao)(gao)頻(pin)方波(bo)(bo)，然后(hou)將整(zheng)流(liu)(liu)(liu)器(qi)(qi)濾(lv)波(bo)(bo)電(dian)(dian)路(lu)(lu)轉(zhuan)換(huan)(huan)為(wei)(wei)系(xi)統轉(zhuan)換(huan)(huan)為(wei)(wei)低壓(ya)(ya)直(zhi)流(liu)(liu)(liu)電(dian)(dian)源(yuan)所需的(de)穩定(ding)(ding)性。電(dian)(dian)壓(ya)(ya)由(you)三(san)端(duan)穩壓(ya)(ya)器(qi)(qi)控制(zhi)(zhi)，直(zhi)流(liu)(liu)(liu)輸出為(wei)(wei)高(gao)(gao)頻(pin)轉(zhuan)換(huan)(huan)驅動脈(mo)(mo)沖(chong)控制(zhi)(zhi)環路(lu)(lu)提供電(dian)(dian)壓(ya)(ya)反饋信號。主功(gong)率(lv)轉(zhuan)換(huan)(huan)電(dian)(dian)路(lu)(lu)中的(de)串聯電(dian)(dian)阻(zu)樣本用作電(dian)(dian)流(liu)(liu)(liu)反饋信號，并且(qie)功(gong)率(lv)轉(zhuan)換(huan)(huan)管驅動脈(mo)(mo)沖(chong)由(you)控制(zhi)(zhi)芯片(例如UC3844)及其wai圍電(dian)(dian)路(lu)(lu)產生：　　可以(yi)看到，當交(jiao)(jiao)流(liu)(liu)(liu)輸入(ru)電(dian)(dian)壓(ya)(ya)低且(qie)沒有(you)電(dian)(dian)流(liu)(liu)(liu)反饋時，輔助(zhu)變壓(ya)(ya)器(qi)(qi)無法(fa)正常(chang)(chang)工作，波(bo)(bo)形(xing)的(de)脈(mo)(mo)沖(chong)寬度不同，存在抖(dou)動，并且(qie)示波(bo)(bo)器(qi)(qi)無法(fa)穩定(ding)(ding)地(di)(di)捕(bu)獲波(bo)(bo)形(xing)。對于(yu)電(dian)(dian)流(liu)(liu)(liu)反饋，波(bo)(bo)形(xing)的(de)脈(mo)(mo)沖(chong)寬度寬而窄，占空(kong)比高(gao)(gao)達47%，而UC3844的(de)*'大占空(kong)比jin為(wei)(wei)50%。增加負載(zai)將降低輸出電(dian)(dian)壓(ya)(ya)。　　在交(jiao)(jiao)流(liu)(liu)(liu)輸入(ru)的(de)上限和(he)下(xia)限電(dian)(dian)壓(ya)(ya)下(xia)穩定(ding)(ding)地(di)(di)操作輔助(zhu)電(dian)(dian)源(yuan)，并且(qie)在從(cong)空(kong)轉(zhuan)到過(guo)載(zai)的(de)整(zheng)個(ge)負載(zai)范圍內，通常(chang)(chang)很(hen)難穩定(ding)(ding)地(di)(di)正常(chang)(chang)操作輔助(zhu)電(dian)(dian)源(yuan)。技術(shu)問題：功(gong)率(lv)器(qi)(qi)件的(de)介電(dian)(dian)強度和(he)過(guo)載(zai)能力，高(gao)(gao)頻(pin)變壓(ya)(ya)器(qi)(qi)的(de)設計(ji)，控制(zhi)(zhi)脈(mo)(mo)沖(chong)控制(zhi)(zhi)回路(lu)(lu)的(de)參數選擇。大功(gong)率(lv)直(zhi)流(liu)(liu)(liu)電(dian)(dian)源(yuan)定(ding)(ding)義以(yi)及優勢(shi)。

當(dang)今的(de)(de)智(zhi)能開關電(dian)(dian)源(yuan)(yuan)具有用(yong)于內部(bu)監視和(he)(he)通信的(de)(de)內部(bu)微處(chu)理器或DSP。微處(chu)理器芯(xin)片具有非常(chang)高的(de)(de)功率要求，所需(xu)的(de)(de)幅度非常(chang)穩(wen)定，更不(bu)用(yong)說(shuo)會(hui)引起(qi)電(dian)(dian)磁(ci)(ci)干擾(rao)的(de)(de)大尖峰(feng)和(he)(he)毛刺，并且(qie)輔助(zhu)電(dian)(dian)源(yuan)(yuan)的(de)(de)交(jiao)(jiao)流適應性大于整流器的(de)(de)正(zheng)(zheng)常(chang)工(gong)作范圍必(bi)(bi)須(xu)寬(kuan)泛(fan)。當(dang)整流器連接到交(jiao)(jiao)流電(dian)(dian)源(yuan)(yuan)時，監視部(bu)分(fen)(fen)必(bi)(bi)須(xu)首先(xian)正(zheng)(zheng)常(chang)運行，執行自檢和(he)(he)各種條件以(yi)查(cha)看整流器是否可以(yi)打開如果交(jiao)(jiao)流電(dian)(dian)壓(ya)過(guo)高或過(guo)低，整流器將停止工(gong)作。但(dan)是，監視部(bu)分(fen)(fen)必(bi)(bi)須(xu)繼續正(zheng)(zheng)常(chang)運行，并保持正(zheng)(zheng)常(chang)的(de)(de)監視和(he)(he)通信。在(zai)操作過(guo)程中，某些電(dian)(dian)源(yuan)(yuan)產品出現(xian)(xian)無緣無故復(fu)位情(qing)況。對大容量開關電(dian)(dian)源(yuan)(yuan)輔助(zhu)電(dian)(dian)源(yuan)(yuan)的(de)(de)設計(ji)分(fen)(fen)析表明，該輔助(zhu)電(dian)(dian)源(yuan)(yuan)在(zai)不(bu)同(tong)的(de)(de)交(jiao)(jiao)流輸入電(dian)(dian)壓(ya)和(he)(he)不(bu)同(tong)的(de)(de)負(fu)載條件下(xia)存在(zai)很(hen)多(duo)問(wen)題。常(chang)見(jian)問(wen)題有交(jiao)(jiao)流適應范圍，低負(fu)載能力，工(gong)作波(bo)形不(bu)穩(wen)定、不(bu)對稱(cheng)的(de)(de)情(qing)況，磁(ci)(ci)偏(pian)置，嚴重的(de)(de)電(dian)(dian)磁(ci)(ci)干擾(rao)等(deng)。直流電(dian)(dian)源(yuan)(yuan)技術的(de)(de)發展(zhan)現(xian)(xian)狀及應用(yong).大功率直流電(dian)(dian)源(yuan)(yuan)廠(chang)家(jia)

程控直(zhi)流電源選(xuan)購指南。RP7936A直(zhi)流電源

嵌入(ru)(ru)式電(dian)(dian)(dian)路(lu)設(she)計的電(dian)(dian)(dian)源(yuan)為所(suo)(suo)有功(gong)(gong)(gong)(gong)(gong)能模(mo)塊提供能源(yuan)，其(qi)效率(lv)(lv)和功(gong)(gong)(gong)(gong)(gong)耗是反(fan)應電(dian)(dian)(dian)路(lu)設(she)計成(cheng)功(gong)(gong)(gong)(gong)(gong)與否的絕(jue)dui標志，故(gu)將(jiang)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)所(suo)(suo)涉(she)及到的知識點(dian)梳理總結以(yi)鞏固(gu)知識點(dian)。在(zai)嵌入(ru)(ru)式系統設(she)計中所(suo)(suo)使用(yong)均是小功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)芯(xin)片而諸如(ru)PC電(dian)(dian)(dian)源(yuan)等(deng)大功(gong)(gong)(gong)(gong)(gong)率(lv)(lv)電(dian)(dian)(dian)源(yuan)可(ke)(ke)以(yi)直(zhi)接找專業開關(guan)電(dian)(dian)(dian)源(yuan)廠(chang)商(shang)直(zhi)接購(gou)買(mai)，且開發難度非(fei)常(chang)大只有專業電(dian)(dian)(dian)源(yuan)工(gong)程師(shi)才能把(ba)握。常(chang)用(yong)直(zhi)流(liu)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)可(ke)(ke)分為線性(xing)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)（俗(su)稱LDO）和開關(guan)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)。前者調(diao)整元件工(gong)作，于(yu)線性(xing)放大區(qu)通過連續的電(dian)(dian)(dian)流(liu)所(suo)(suo)以(yi)其(qi)動(dong)態(tai)響(xiang)應較(jiao)好，但其(qi)功(gong)(gong)(gong)(gong)(gong)耗和體積較(jiao)大轉(zhuan)(zhuan)換(huan)效率(lv)(lv)很(hen)低，一(yi)般進行(xing)降壓(ya)(ya)(ya)轉(zhuan)(zhuan)換(huan)處理，使用(yong)在(zai)較(jiao)敏感模(mo)擬(ni)電(dian)(dian)(dian)路(lu)。后者體積和功(gong)(gong)(gong)(gong)(gong)耗較(jiao)小轉(zhuan)(zhuan)換(huan)效率(lv)(lv)高，但其(qi)電(dian)(dian)(dian)壓(ya)(ya)(ya)輸出紋波大，動(dong)態(tai)響(xiang)應差，可(ke)(ke)用(yong)于(yu)降壓(ya)(ya)(ya)或升壓(ya)(ya)(ya)轉(zhuan)(zhuan)換(huan)處理。RP7936A直(zhi)流(liu)電(dian)(dian)(dian)源(yuan)

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