嵌入式(shi)电(dian)(dian)(dian)路(lu)设计(ji)的电(dian)(dian)(dian)源(yuan)(yuan)为(wei)所(suo)有(you)(you)功(gong)(gong)能(neng)模块(kuai)提供能(neng)源(yuan)(yuan)，其效率(lv)(lv)和(he)功(gong)(gong)耗(hao)是反(fan)应电(dian)(dian)(dian)路(lu)设计(ji)成功(gong)(gong)与否的绝dui标志，故将稳压电(dian)(dian)(dian)源(yuan)(yuan)所(suo)涉及到的知(zhi)(zhi)识点梳理(li)总结(jie)以(yi)巩固知(zhi)(zhi)识点。在嵌入式(shi)系(xi)统设计(ji)中所(suo)使用(yong)均(jun)是小功(gong)(gong)率(lv)(lv)芯片，而诸如(ru)PC电(dian)(dian)(dian)源(yuan)(yuan)等大(da)(da)功(gong)(gong)率(lv)(lv)电(dian)(dian)(dian)源(yuan)(yuan)可(ke)以(yi)直接找专业开关电(dian)(dian)(dian)源(yuan)(yuan)厂(chang)商直接购(gou)买(mai)，且开发难度(du)非常大(da)(da)只有(you)(you)专业电(dian)(dian)(dian)源(yuan)(yuan)工(gong)程师(shi)才能(neng)把(ba)握。常用(yong)直流稳压电(dian)(dian)(dian)源(yuan)(yuan)可(ke)分为(wei)线性(xing)稳压电(dian)(dian)(dian)源(yuan)(yuan)（俗称LDO）和(he)开关稳压电(dian)(dian)(dian)源(yuan)(yuan)。前(qian)者调整元件工(gong)作(zuo)于线性(xing)放大(da)(da)区通过(guo)连续(xu)的电(dian)(dian)(dian)流所(suo)以(yi)其动(dong)态响(xiang)应较(jiao)好，但其功(gong)(gong)耗(hao)和(he)体积较(jiao)大(da)(da)转(zhuan)换效率(lv)(lv)很低，一般进行降(jiang)压转(zhuan)换处理(li)，使用(yong)在较(jiao)敏感模拟电(dian)(dian)(dian)路(lu)。后(hou)者体积和(he)功(gong)(gong)耗(hao)较(jiao)小转(zhuan)换效率(lv)(lv)高，但其电(dian)(dian)(dian)压输出纹波大(da)(da)，动(dong)态响(xiang)应差，可(ke)用(yong)于降(jiang)压或(huo)升(sheng)压转(zhuan)换处理(li)。什么是直流电(dian)(dian)(dian)源(yuan)(yuan)，直流电(dian)(dian)(dian)源(yuan)(yuan)的工(gong)作(zuo)原理(li)。RP7936A直流电(dian)(dian)(dian)源(yuan)(yuan)

嵌入(ru)式(shi)(shi)电(dian)(dian)(dian)(dian)路设计(ji)(ji)的(de)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)为所(suo)有功(gong)(gong)能(neng)模块提供能(neng)源(yuan)(yuan)(yuan)(yuan)(yuan)，其(qi)效率(lv)(lv)和功(gong)(gong)耗是反应(ying)电(dian)(dian)(dian)(dian)路设计(ji)(ji)成功(gong)(gong)与否的(de)绝dui标志。故将(jiang)稳(wen)(wen)压(ya)(ya)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)所(suo)涉及到的(de)知识(shi)点梳(shu)理总结以(yi)巩(gong)固知识(shi)点。在(zai)嵌入(ru)式(shi)(shi)系统设计(ji)(ji)中所(suo)使(shi)(shi)用(yong)均是小功(gong)(gong)率(lv)(lv)芯片。而(er)诸如PC电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)等(deng)大(da)功(gong)(gong)率(lv)(lv)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)可以(yi)直接找专业开关电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)厂商直接购买，且(qie)开发难(nan)度(du)非(fei)常大(da)只有专业电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)工(gong)(gong)程师才能(neng)把握。常用(yong)直流稳(wen)(wen)压(ya)(ya)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)可分为线(xian)性稳(wen)(wen)压(ya)(ya)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)（俗称LDO）和开关稳(wen)(wen)压(ya)(ya)电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)。前者调整元件工(gong)(gong)作于线(xian)性放大(da)区(qu)，通(tong)过连(lian)续的(de)电(dian)(dian)(dian)(dian)流所(suo)以(yi)其(qi)动态响应(ying)较(jiao)好，但(dan)其(qi)功(gong)(gong)耗和体积(ji)较(jiao)大(da)转(zhuan)换效率(lv)(lv)很(hen)低(di)，一般进行降(jiang)压(ya)(ya)转(zhuan)换处(chu)理，使(shi)(shi)用(yong)在(zai)较(jiao)敏感模拟电(dian)(dian)(dian)(dian)路。后者体积(ji)和功(gong)(gong)耗较(jiao)小转(zhuan)换效率(lv)(lv)高(gao)，但(dan)其(qi)电(dian)(dian)(dian)(dian)压(ya)(ya)输出纹波大(da)，动态响应(ying)差，可用(yong)于降(jiang)压(ya)(ya)或升(sheng)压(ya)(ya)转(zhuan)换处(chu)理。RP7936A直流电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)交流电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)和直流电(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)区(qu)别有哪些不同(tong).

嵌入(ru)式电(dian)(dian)路设计(ji)的电(dian)(dian)源(yuan)(yuan)为所(suo)(suo)有(you)(you)功能(neng)(neng)模(mo)块提供(gong)能(neng)(neng)源(yuan)(yuan)其效率(lv)和功耗是反应电(dian)(dian)路设计(ji)成(cheng)功与否的绝dui标志，故将稳压(ya)(ya)(ya)电(dian)(dian)源(yuan)(yuan)所(suo)(suo)涉及到的知(zhi)识点梳理(li)(li)(li)总(zong)结以(yi)巩固知(zhi)识点。在嵌入(ru)式系统(tong)设计(ji)中所(suo)(suo)使(shi)用(yong)均是小(xiao)功率(lv)芯片(pian)，而诸如PC电(dian)(dian)源(yuan)(yuan)等(deng)大(da)功率(lv)电(dian)(dian)源(yuan)(yuan)可以(yi)直(zhi)接找专(zhuan)业(ye)开关电(dian)(dian)源(yuan)(yuan)厂商(shang)直(zhi)接购买，且开发难度非常大(da)只有(you)(you)专(zhuan)业(ye)电(dian)(dian)源(yuan)(yuan)工程(cheng)师(shi)才能(neng)(neng)把握。常用(yong)直(zhi)流稳压(ya)(ya)(ya)电(dian)(dian)源(yuan)(yuan)可分为线(xian)性稳压(ya)(ya)(ya)电(dian)(dian)源(yuan)(yuan)（俗(su)称LDO）和开关稳压(ya)(ya)(ya)电(dian)(dian)源(yuan)(yuan)。前者(zhe)调(diao)整元件工作于线(xian)性放大(da)区，通过连(lian)续的电(dian)(dian)流所(suo)(suo)以(yi)其动(dong)态响应较好但其功耗和体(ti)积较大(da)转(zhuan)换(huan)效率(lv)很低(di)一(yi)般(ban)进行降压(ya)(ya)(ya)转(zhuan)换(huan)处理(li)(li)(li)，使(shi)用(yong)在较敏感模(mo)拟电(dian)(dian)路。后者(zhe)体(ti)积和功耗较小(xiao)转(zhuan)换(huan)效率(lv)高，但其电(dian)(dian)压(ya)(ya)(ya)输出(chu)纹波大(da)，动(dong)态响应差(cha)，可用(yong)于降压(ya)(ya)(ya)或升压(ya)(ya)(ya)转(zhuan)换(huan)处理(li)(li)(li)。

开关整流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)辅(fu)(fu)助(zhu)电(dian)(dian)(dian)(dian)源(yuan)的一般工作原(yuan)理是输入(ru)交流(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)源(yuan)，将(jiang)其整流(liu)(liu)(liu)(liu)(liu)为(wei)(wei)高(gao)压(ya)(ya)直流(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)源(yuan)，然后(hou)将(jiang)电(dian)(dian)(dian)(dian)路(lu)(lu)转换(huan)为(wei)(wei)低(di)压(ya)(ya)高(gao)频方波(bo)(bo)(bo)，然后(hou)将(jiang)整流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)滤波(bo)(bo)(bo)电(dian)(dian)(dian)(dian)路(lu)(lu)转换(huan)为(wei)(wei)系统转换(huan)为(wei)(wei)低(di)压(ya)(ya)直流(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)源(yuan)所需的稳(wen)(wen)定(ding)性。电(dian)(dian)(dian)(dian)压(ya)(ya)由三端稳(wen)(wen)压(ya)(ya)器(qi)(qi)控(kong)(kong)制(zhi)，直流(liu)(liu)(liu)(liu)(liu)输出为(wei)(wei)高(gao)频转换(huan)驱(qu)动(dong)脉冲控(kong)(kong)制(zhi)环(huan)路(lu)(lu)提供电(dian)(dian)(dian)(dian)压(ya)(ya)反(fan)馈信号。主功(gong)率转换(huan)电(dian)(dian)(dian)(dian)路(lu)(lu)中(zhong)的串联电(dian)(dian)(dian)(dian)阻样本用(yong)作电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)反(fan)馈信号，并(bing)(bing)且功(gong)率转换(huan)管驱(qu)动(dong)脉冲由控(kong)(kong)制(zhi)芯片(例如(ru)UC3844)及其wai围电(dian)(dian)(dian)(dian)路(lu)(lu)产生(sheng)：　　可以看到(dao)，当交流(liu)(liu)(liu)(liu)(liu)输入(ru)电(dian)(dian)(dian)(dian)压(ya)(ya)低(di)且没有电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)反(fan)馈时(shi)，辅(fu)(fu)助(zhu)变压(ya)(ya)器(qi)(qi)无(wu)法正常(chang)工作，波(bo)(bo)(bo)形的脉冲宽(kuan)(kuan)度(du)不同，存在抖动(dong)，并(bing)(bing)且示波(bo)(bo)(bo)器(qi)(qi)无(wu)法稳(wen)(wen)定(ding)地(di)捕获波(bo)(bo)(bo)形。对于电(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)反(fan)馈，波(bo)(bo)(bo)形的脉冲宽(kuan)(kuan)度(du)宽(kuan)(kuan)而(er)(er)窄，占空(kong)比高(gao)达47%，而(er)(er)UC3844的*'大占空(kong)比jin为(wei)(wei)50%。增加负(fu)载(zai)(zai)将(jiang)降低(di)输出电(dian)(dian)(dian)(dian)压(ya)(ya)。　　在交流(liu)(liu)(liu)(liu)(liu)输入(ru)的上限和(he)下(xia)限电(dian)(dian)(dian)(dian)压(ya)(ya)下(xia)稳(wen)(wen)定(ding)地(di)操(cao)(cao)作辅(fu)(fu)助(zhu)电(dian)(dian)(dian)(dian)源(yuan)，并(bing)(bing)且在从(cong)空(kong)转到(dao)过载(zai)(zai)的整个负(fu)载(zai)(zai)范围内，通常(chang)很难(nan)稳(wen)(wen)定(ding)地(di)正常(chang)操(cao)(cao)作辅(fu)(fu)助(zhu)电(dian)(dian)(dian)(dian)源(yuan)。技(ji)术(shu)问题(ti)：功(gong)率器(qi)(qi)件的介电(dian)(dian)(dian)(dian)强度(du)和(he)过载(zai)(zai)能力，高(gao)频变压(ya)(ya)器(qi)(qi)的设计，控(kong)(kong)制(zhi)脉冲控(kong)(kong)制(zhi)回路(lu)(lu)的参数选择。大功(gong)率直流(liu)(liu)(liu)(liu)(liu)电(dian)(dian)(dian)(dian)源(yuan)定(ding)义以及优势。

当(dang)(dang)今的(de)(de)(de)智能开(kai)关电(dian)(dian)源(yuan)(yuan)(yuan)具(ju)有(you)用(yong)于内(nei)(nei)部(bu)(bu)监(jian)视(shi)和(he)(he)(he)通(tong)信(xin)的(de)(de)(de)内(nei)(nei)部(bu)(bu)微处理(li)器(qi)(qi)(qi)或DSP。微处理(li)器(qi)(qi)(qi)芯片具(ju)有(you)非常(chang)(chang)(chang)高(gao)的(de)(de)(de)功率(lv)(lv)要求，所需的(de)(de)(de)幅度非常(chang)(chang)(chang)稳定，更不用(yong)说会(hui)引(yin)起电(dian)(dian)磁干扰的(de)(de)(de)大尖峰(feng)和(he)(he)(he)毛刺，并(bing)且辅(fu)(fu)助(zhu)电(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)(de)交流(liu)(liu)适(shi)应(ying)性大于整流(liu)(liu)器(qi)(qi)(qi)的(de)(de)(de)正常(chang)(chang)(chang)工(gong)作范围(wei)(wei)必须宽泛。当(dang)(dang)整流(liu)(liu)器(qi)(qi)(qi)连接到(dao)交流(liu)(liu)电(dian)(dian)源(yuan)(yuan)(yuan)时，监(jian)视(shi)部(bu)(bu)分必须首先(xian)正常(chang)(chang)(chang)运行(xing)，执行(xing)自检和(he)(he)(he)各种条件以查看整流(liu)(liu)器(qi)(qi)(qi)是(shi)否可(ke)以打开(kai)如果交流(liu)(liu)电(dian)(dian)压过高(gao)或过低，整流(liu)(liu)器(qi)(qi)(qi)将停(ting)止工(gong)作。但是(shi)，监(jian)视(shi)部(bu)(bu)分必须继续正常(chang)(chang)(chang)运行(xing)，并(bing)保持正常(chang)(chang)(chang)的(de)(de)(de)监(jian)视(shi)和(he)(he)(he)通(tong)信(xin)。在操作过程中，某(mou)些电(dian)(dian)源(yuan)(yuan)(yuan)产品(pin)出现无缘无故复位(wei)情(qing)况。对(dui)大容量开(kai)关电(dian)(dian)源(yuan)(yuan)(yuan)辅(fu)(fu)助(zhu)电(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)(de)设计分析(xi)表明(ming)，该辅(fu)(fu)助(zhu)电(dian)(dian)源(yuan)(yuan)(yuan)在不同(tong)(tong)的(de)(de)(de)交流(liu)(liu)输入电(dian)(dian)压和(he)(he)(he)不同(tong)(tong)的(de)(de)(de)负(fu)载条件下(xia)存在很多(duo)问(wen)题。常(chang)(chang)(chang)见问(wen)题有(you)交流(liu)(liu)适(shi)应(ying)范围(wei)(wei)，低负(fu)载能力，工(gong)作波形(xing)不稳定、不对(dui)称的(de)(de)(de)情(qing)况，磁偏置，严重的(de)(de)(de)电(dian)(dian)磁干扰等(deng)。直流(liu)(liu)电(dian)(dian)源(yuan)(yuan)(yuan)技术的(de)(de)(de)发展现状及(ji)应(ying)用(yong).大功率(lv)(lv)直流(liu)(liu)电(dian)(dian)源(yuan)(yuan)(yuan)厂家

程控直流(liu)电(dian)(dian)源选购指(zhi)南(nan)。RP7936A直流(liu)电(dian)(dian)源

嵌(qian)入式电(dian)(dian)(dian)路(lu)设计(ji)的电(dian)(dian)(dian)源(yuan)(yuan)(yuan)为(wei)所有功(gong)能模块提供能源(yuan)(yuan)(yuan)，其(qi)(qi)效率(lv)(lv)和功(gong)耗是反(fan)应电(dian)(dian)(dian)路(lu)设计(ji)成功(gong)与否的绝dui标志，故将稳压(ya)电(dian)(dian)(dian)源(yuan)(yuan)(yuan)所涉及到的知(zhi)识点梳理(li)总结以(yi)巩固知(zhi)识点。在嵌(qian)入式系统(tong)设计(ji)中所使(shi)(shi)用(yong)均是小功(gong)率(lv)(lv)芯片而诸如(ru)PC电(dian)(dian)(dian)源(yuan)(yuan)(yuan)等大(da)(da)功(gong)率(lv)(lv)电(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)以(yi)直(zhi)(zhi)接找专(zhuan)业开(kai)关电(dian)(dian)(dian)源(yuan)(yuan)(yuan)厂商直(zhi)(zhi)接购买，且开(kai)发难度非常大(da)(da)只(zhi)有专(zhuan)业电(dian)(dian)(dian)源(yuan)(yuan)(yuan)工程师才能把握。常用(yong)直(zhi)(zhi)流稳压(ya)电(dian)(dian)(dian)源(yuan)(yuan)(yuan)可(ke)分(fen)为(wei)线(xian)性稳压(ya)电(dian)(dian)(dian)源(yuan)(yuan)(yuan)（俗称(cheng)LDO）和开(kai)关稳压(ya)电(dian)(dian)(dian)源(yuan)(yuan)(yuan)。前者调(diao)整元件工作，于(yu)(yu)线(xian)性放大(da)(da)区通过连续的电(dian)(dian)(dian)流所以(yi)其(qi)(qi)动态响应较(jiao)好(hao)，但(dan)其(qi)(qi)功(gong)耗和体积(ji)(ji)较(jiao)大(da)(da)转换(huan)效率(lv)(lv)很(hen)低，一般进(jin)行(xing)降压(ya)转换(huan)处理(li)，使(shi)(shi)用(yong)在较(jiao)敏感模拟电(dian)(dian)(dian)路(lu)。后者体积(ji)(ji)和功(gong)耗较(jiao)小转换(huan)效率(lv)(lv)高，但(dan)其(qi)(qi)电(dian)(dian)(dian)压(ya)输出纹波大(da)(da)，动态响应差，可(ke)用(yong)于(yu)(yu)降压(ya)或(huo)升(sheng)压(ya)转换(huan)处理(li)。RP7936A直(zhi)(zhi)流电(dian)(dian)(dian)源(yuan)(yuan)(yuan)

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