嵌入式(shi)電(dian)(dian)(dian)(dian)路(lu)(lu)設(she)計的電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)為(wei)所(suo)(suo)有功(gong)(gong)(gong)能模(mo)(mo)塊提供能源(yuan)(yuan)(yuan)(yuan)，其(qi)(qi)效率(lv)(lv)和(he)(he)功(gong)(gong)(gong)耗是(shi)反應(ying)電(dian)(dian)(dian)(dian)路(lu)(lu)設(she)計成功(gong)(gong)(gong)與否的絕dui標志，故將穩壓(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)所(suo)(suo)涉及到的知識(shi)點梳理(li)總(zong)結以鞏固知識(shi)點。在(zai)嵌入式(shi)系統(tong)設(she)計中(zhong)所(suo)(suo)使用(yong)均是(shi)小功(gong)(gong)(gong)率(lv)(lv)芯片，而諸(zhu)如PC電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)等(deng)大(da)(da)功(gong)(gong)(gong)率(lv)(lv)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可(ke)以直接找(zhao)專業(ye)開(kai)關(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)廠(chang)商直接購(gou)買，且開(kai)發難度非常大(da)(da)只有專業(ye)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)工程師才能把握。常用(yong)直流(liu)穩壓(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可(ke)分(fen)為(wei)線(xian)(xian)性(xing)穩壓(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)（俗稱LDO）和(he)(he)開(kai)關(guan)穩壓(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)。前者調整元(yuan)件工作于(yu)線(xian)(xian)性(xing)放(fang)大(da)(da)區通過連續的電(dian)(dian)(dian)(dian)流(liu)所(suo)(suo)以其(qi)(qi)動態響應(ying)較(jiao)好，但其(qi)(qi)功(gong)(gong)(gong)耗和(he)(he)體積較(jiao)大(da)(da)轉(zhuan)換(huan)效率(lv)(lv)很低(di)，一般進(jin)行降壓(ya)轉(zhuan)換(huan)處理(li)，使用(yong)在(zai)較(jiao)敏感(gan)模(mo)(mo)擬電(dian)(dian)(dian)(dian)路(lu)(lu)。后者體積和(he)(he)功(gong)(gong)(gong)耗較(jiao)小轉(zhuan)換(huan)效率(lv)(lv)高，但其(qi)(qi)電(dian)(dian)(dian)(dian)壓(ya)輸出紋波大(da)(da)，動態響應(ying)差，可(ke)用(yong)于(yu)降壓(ya)或(huo)升壓(ya)轉(zhuan)換(huan)處理(li)。什么是(shi)直流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，直流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的工作原理(li)。RP7936A直流(liu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)

嵌入式(shi)(shi)電(dian)(dian)(dian)路(lu)設(she)計(ji)的(de)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)為所有(you)功(gong)能模塊提供能源(yuan)(yuan)(yuan)，其效率和(he)(he)(he)功(gong)耗(hao)是(shi)反應(ying)電(dian)(dian)(dian)路(lu)設(she)計(ji)成(cheng)功(gong)與否的(de)絕dui標志(zhi)。故將(jiang)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)所涉(she)及到(dao)的(de)知(zhi)識點梳(shu)理(li)總(zong)結以鞏固(gu)知(zhi)識點。在(zai)嵌入式(shi)(shi)系統(tong)設(she)計(ji)中(zhong)所使用(yong)均是(shi)小功(gong)率芯片。而諸如PC電(dian)(dian)(dian)源(yuan)(yuan)(yuan)等(deng)大(da)(da)功(gong)率電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可以直(zhi)接找專業(ye)開(kai)關(guan)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)廠商(shang)直(zhi)接購買，且開(kai)發難度非常(chang)大(da)(da)只有(you)專業(ye)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)工程師(shi)才能把(ba)握。常(chang)用(yong)直(zhi)流(liu)(liu)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)可分為線性穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)（俗稱LDO）和(he)(he)(he)開(kai)關(guan)穩(wen)壓(ya)(ya)(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)。前者調(diao)整(zheng)元件工作(zuo)于線性放大(da)(da)區，通過連續的(de)電(dian)(dian)(dian)流(liu)(liu)所以其動(dong)態(tai)響應(ying)較好，但其功(gong)耗(hao)和(he)(he)(he)體積較大(da)(da)轉換(huan)效率很低(di)，一(yi)般進行降(jiang)壓(ya)(ya)(ya)轉換(huan)處(chu)理(li)，使用(yong)在(zai)較敏感模擬電(dian)(dian)(dian)路(lu)。后者體積和(he)(he)(he)功(gong)耗(hao)較小轉換(huan)效率高，但其電(dian)(dian)(dian)壓(ya)(ya)(ya)輸(shu)出(chu)紋波大(da)(da)，動(dong)態(tai)響應(ying)差(cha)，可用(yong)于降(jiang)壓(ya)(ya)(ya)或(huo)升壓(ya)(ya)(ya)轉換(huan)處(chu)理(li)。RP7936A直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)交流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)和(he)(he)(he)直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)區別(bie)有(you)哪些不同.

嵌入(ru)式電(dian)(dian)(dian)路設(she)計的(de)(de)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)為所(suo)(suo)(suo)有(you)功(gong)能(neng)(neng)模塊(kuai)提供能(neng)(neng)源(yuan)(yuan)(yuan)(yuan)其(qi)(qi)(qi)效(xiao)率(lv)(lv)(lv)和功(gong)耗是反應(ying)電(dian)(dian)(dian)路設(she)計成功(gong)與否的(de)(de)絕dui標志，故將(jiang)穩(wen)壓(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)所(suo)(suo)(suo)涉(she)及到的(de)(de)知識(shi)點梳理總結以(yi)鞏(gong)固知識(shi)點。在嵌入(ru)式系統設(she)計中(zhong)所(suo)(suo)(suo)使(shi)用均是小功(gong)率(lv)(lv)(lv)芯片，而諸(zhu)如(ru)PC電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)等(deng)大(da)功(gong)率(lv)(lv)(lv)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可以(yi)直接(jie)找專業(ye)開(kai)(kai)關電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)廠商直接(jie)購(gou)買，且開(kai)(kai)發難度非常(chang)大(da)只有(you)專業(ye)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)工程師才能(neng)(neng)把握。常(chang)用直流(liu)穩(wen)壓(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)可分(fen)為線性穩(wen)壓(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)（俗稱(cheng)LDO）和開(kai)(kai)關穩(wen)壓(ya)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)。前者(zhe)調整元件工作于線性放大(da)區，通過(guo)連續的(de)(de)電(dian)(dian)(dian)流(liu)所(suo)(suo)(suo)以(yi)其(qi)(qi)(qi)動態(tai)響(xiang)應(ying)較(jiao)好但其(qi)(qi)(qi)功(gong)耗和體積(ji)較(jiao)大(da)轉(zhuan)換(huan)效(xiao)率(lv)(lv)(lv)很低一般進行降(jiang)壓(ya)轉(zhuan)換(huan)處(chu)理，使(shi)用在較(jiao)敏感模擬電(dian)(dian)(dian)路。后(hou)者(zhe)體積(ji)和功(gong)耗較(jiao)小轉(zhuan)換(huan)效(xiao)率(lv)(lv)(lv)高，但其(qi)(qi)(qi)電(dian)(dian)(dian)壓(ya)輸出紋波大(da)，動態(tai)響(xiang)應(ying)差，可用于降(jiang)壓(ya)或(huo)升壓(ya)轉(zhuan)換(huan)處(chu)理。

開關(guan)整(zheng)流(liu)(liu)器(qi)(qi)輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源的(de)(de)(de)一(yi)般工作(zuo)原理是輸入(ru)(ru)交(jiao)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源，將(jiang)其(qi)整(zheng)流(liu)(liu)為(wei)(wei)高(gao)(gao)(gao)壓(ya)直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源，然后將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)轉(zhuan)換(huan)為(wei)(wei)低(di)(di)壓(ya)高(gao)(gao)(gao)頻方波(bo)，然后將(jiang)整(zheng)流(liu)(liu)器(qi)(qi)濾(lv)波(bo)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)轉(zhuan)換(huan)為(wei)(wei)系統轉(zhuan)換(huan)為(wei)(wei)低(di)(di)壓(ya)直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源所需(xu)的(de)(de)(de)穩(wen)(wen)定(ding)性(xing)。電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)由(you)三端穩(wen)(wen)壓(ya)器(qi)(qi)控(kong)制(zhi)(zhi)(zhi)，直流(liu)(liu)輸出為(wei)(wei)高(gao)(gao)(gao)頻轉(zhuan)換(huan)驅動脈(mo)沖(chong)控(kong)制(zhi)(zhi)(zhi)環路(lu)(lu)提供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)反饋(kui)信號。主功(gong)(gong)率(lv)(lv)轉(zhuan)換(huan)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中的(de)(de)(de)串聯電(dian)(dian)(dian)(dian)(dian)(dian)阻樣本用作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)反饋(kui)信號，并且(qie)(qie)功(gong)(gong)率(lv)(lv)轉(zhuan)換(huan)管驅動脈(mo)沖(chong)由(you)控(kong)制(zhi)(zhi)(zhi)芯片(pian)(例(li)如UC3844)及(ji)其(qi)wai圍電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)產(chan)生：　　可以看到(dao)(dao)，當(dang)交(jiao)流(liu)(liu)輸入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)低(di)(di)且(qie)(qie)沒有電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)反饋(kui)時(shi)，輔(fu)助變壓(ya)器(qi)(qi)無法正常工作(zuo)，波(bo)形(xing)的(de)(de)(de)脈(mo)沖(chong)寬(kuan)度不同，存在抖動，并且(qie)(qie)示波(bo)器(qi)(qi)無法穩(wen)(wen)定(ding)地(di)捕獲波(bo)形(xing)。對于電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)反饋(kui)，波(bo)形(xing)的(de)(de)(de)脈(mo)沖(chong)寬(kuan)度寬(kuan)而窄，占空比(bi)高(gao)(gao)(gao)達47%，而UC3844的(de)(de)(de)*'大占空比(bi)jin為(wei)(wei)50%。增(zeng)加負(fu)載(zai)將(jiang)降(jiang)低(di)(di)輸出電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。　　在交(jiao)流(liu)(liu)輸入(ru)(ru)的(de)(de)(de)上限(xian)和下限(xian)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下穩(wen)(wen)定(ding)地(di)操作(zuo)輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源，并且(qie)(qie)在從空轉(zhuan)到(dao)(dao)過載(zai)的(de)(de)(de)整(zheng)個(ge)負(fu)載(zai)范(fan)圍內，通常很(hen)難(nan)穩(wen)(wen)定(ding)地(di)正常操作(zuo)輔(fu)助電(dian)(dian)(dian)(dian)(dian)(dian)源。技術問題：功(gong)(gong)率(lv)(lv)器(qi)(qi)件的(de)(de)(de)介電(dian)(dian)(dian)(dian)(dian)(dian)強度和過載(zai)能力，高(gao)(gao)(gao)頻變壓(ya)器(qi)(qi)的(de)(de)(de)設計，控(kong)制(zhi)(zhi)(zhi)脈(mo)沖(chong)控(kong)制(zhi)(zhi)(zhi)回路(lu)(lu)的(de)(de)(de)參數選擇。大功(gong)(gong)率(lv)(lv)直流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)(dian)源定(ding)義(yi)以及(ji)優勢。

當今的(de)(de)(de)(de)(de)(de)智能開關電(dian)源(yuan)(yuan)(yuan)(yuan)具有(you)用于內部(bu)監視和(he)通信的(de)(de)(de)(de)(de)(de)內部(bu)微處理器(qi)(qi)或DSP。微處理器(qi)(qi)芯片具有(you)非常(chang)高(gao)的(de)(de)(de)(de)(de)(de)功率(lv)要(yao)求，所需的(de)(de)(de)(de)(de)(de)幅度非常(chang)穩定，更(geng)不用說(shuo)會引起電(dian)磁干擾的(de)(de)(de)(de)(de)(de)大尖(jian)峰和(he)毛刺，并(bing)且輔助電(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)交(jiao)(jiao)流(liu)適應(ying)性(xing)大于整流(liu)器(qi)(qi)的(de)(de)(de)(de)(de)(de)正(zheng)常(chang)工(gong)作(zuo)范圍(wei)必須(xu)寬泛。當整流(liu)器(qi)(qi)連接到交(jiao)(jiao)流(liu)電(dian)源(yuan)(yuan)(yuan)(yuan)時，監視部(bu)分(fen)(fen)必須(xu)首先正(zheng)常(chang)運行(xing)(xing)，執行(xing)(xing)自(zi)檢和(he)各種條件(jian)(jian)以(yi)查看(kan)整流(liu)器(qi)(qi)是否(fou)可以(yi)打開如果交(jiao)(jiao)流(liu)電(dian)壓過(guo)(guo)(guo)高(gao)或過(guo)(guo)(guo)低，整流(liu)器(qi)(qi)將停止工(gong)作(zuo)。但是，監視部(bu)分(fen)(fen)必須(xu)繼續正(zheng)常(chang)運行(xing)(xing)，并(bing)保持正(zheng)常(chang)的(de)(de)(de)(de)(de)(de)監視和(he)通信。在(zai)(zai)操作(zuo)過(guo)(guo)(guo)程(cheng)中，某些電(dian)源(yuan)(yuan)(yuan)(yuan)產品出(chu)現(xian)無(wu)(wu)緣無(wu)(wu)故復位情況(kuang)。對(dui)大容量開關電(dian)源(yuan)(yuan)(yuan)(yuan)輔助電(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)設計分(fen)(fen)析表明，該(gai)輔助電(dian)源(yuan)(yuan)(yuan)(yuan)在(zai)(zai)不同的(de)(de)(de)(de)(de)(de)交(jiao)(jiao)流(liu)輸入電(dian)壓和(he)不同的(de)(de)(de)(de)(de)(de)負載(zai)條件(jian)(jian)下(xia)存在(zai)(zai)很(hen)多(duo)問題(ti)。常(chang)見問題(ti)有(you)交(jiao)(jiao)流(liu)適應(ying)范圍(wei)，低負載(zai)能力，工(gong)作(zuo)波形不穩定、不對(dui)稱的(de)(de)(de)(de)(de)(de)情況(kuang)，磁偏(pian)置，嚴重的(de)(de)(de)(de)(de)(de)電(dian)磁干擾等(deng)。直(zhi)流(liu)電(dian)源(yuan)(yuan)(yuan)(yuan)技術(shu)的(de)(de)(de)(de)(de)(de)發展現(xian)狀及應(ying)用.大功率(lv)直(zhi)流(liu)電(dian)源(yuan)(yuan)(yuan)(yuan)廠家

程控直流電源(yuan)(yuan)選購指南。RP7936A直流電源(yuan)(yuan)

嵌入式電(dian)(dian)(dian)(dian)路設(she)計(ji)的(de)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)為所(suo)有功(gong)(gong)能(neng)模塊提供能(neng)源(yuan)(yuan)(yuan)，其效率(lv)(lv)和功(gong)(gong)耗是反應電(dian)(dian)(dian)(dian)路設(she)計(ji)成功(gong)(gong)與否的(de)絕dui標志，故(gu)將穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)所(suo)涉及到的(de)知識點梳理(li)總(zong)結(jie)以鞏(gong)固知識點。在(zai)嵌入式系統設(she)計(ji)中所(suo)使用均是小(xiao)功(gong)(gong)率(lv)(lv)芯(xin)片而諸(zhu)如PC電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)等大(da)功(gong)(gong)率(lv)(lv)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)以直接(jie)找專業開關(guan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)廠商直接(jie)購買，且開發難度非常大(da)只有專業電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)工程師才能(neng)把握。常用直流穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)分(fen)為線(xian)性穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)（俗(su)稱LDO）和開關(guan)穩壓(ya)(ya)(ya)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)。前(qian)者調整元件工作(zuo)，于(yu)(yu)線(xian)性放大(da)區通過連(lian)續的(de)電(dian)(dian)(dian)(dian)流所(suo)以其動(dong)態(tai)響應較(jiao)(jiao)(jiao)好，但其功(gong)(gong)耗和體積(ji)較(jiao)(jiao)(jiao)大(da)轉換效率(lv)(lv)很低，一般進行降壓(ya)(ya)(ya)轉換處(chu)理(li)，使用在(zai)較(jiao)(jiao)(jiao)敏感模擬(ni)電(dian)(dian)(dian)(dian)路。后(hou)者體積(ji)和功(gong)(gong)耗較(jiao)(jiao)(jiao)小(xiao)轉換效率(lv)(lv)高，但其電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)輸出紋波大(da)，動(dong)態(tai)響應差，可(ke)用于(yu)(yu)降壓(ya)(ya)(ya)或升壓(ya)(ya)(ya)轉換處(chu)理(li)。RP7936A直流電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)

本文(wen)來自四川精碳偉業環保(bao)科技有(you)限責任公司：//wasul.cn/Article/00a31699683.html