一、dcdc電源模塊原理是什么
dcdc電(dian)(dian)源模塊原理:假設Q為(wei)開(kai)關管(guan)(guan),L為(wei)儲能(neng)(neng)(neng)(neng)電(dian)(dian)感,D為(wei)整(zheng)流(liu)(liu)(liu)管(guan)(guan),C為(wei)濾(lv)波電(dian)(dian)容,RL為(wei)負載。當煽動脈沖為(wei)高(gao)電(dian)(dian)往常,開(kai)關管(guan)(guan)Q豐滿(man)導(dao)通,整(zheng)流(liu)(liu)(liu)管(guan)(guan)D截(jie)止,輸(shu)入電(dian)(dian)壓(ya)加在(zai)電(dian)(dian)感L上,電(dian)(dian)感L以磁(ci)能(neng)(neng)(neng)(neng)辦法存儲能(neng)(neng)(neng)(neng)量(liang),當Q截(jie)止時(shi)期,整(zheng)流(liu)(liu)(liu)管(guan)(guan)D導(dao)通,電(dian)(dian)感L貯(zhu)存的(de)能(neng)(neng)(neng)(neng)量(liang)經(jing)D開(kai)釋,在(zai)電(dian)(dian)容C兩頭發作直流(liu)(liu)(liu)電(dian)(dian)壓(ya),然后為(wei)負載RL供應供電(dian)(dian)電(dian)(dian)源。在(zai)給定條件下,輸(shu)出端電(dian)(dian)壓(ya)的(de)凹凸由Q的(de)豐滿(man)導(dao)通時(shi)刻(ke)長短挑選,即由基極所加煽動電(dian)(dian)壓(ya)的(de)脈沖寬度挑選。
二、dcdc電源模塊的優點有哪些
1、采(cai)用隔離式設(she)計,可以有效的(de)(de)隔離來(lai)自一次(ci)側設(she)備帶(dai)來(lai)的(de)(de)共(gong)模干擾對系(xi)統的(de)(de)影響,使負載能夠穩定的(de)(de)工(gong)作。
2、可以(yi)進行電(dian)(dian)壓(ya)轉(zhuan)換(huan),不同的負載需要(yao)(yao)不同的供電(dian)(dian)電(dian)(dian)壓(ya),例如(ru)控制IC需要(yao)(yao)5V、3.3V、1.8V等;信號采(cai)集用的運(yun)放(fang)則(ze)需要(yao)(yao)±15V;繼(ji)電(dian)(dian)器(qi)則(ze)需要(yao)(yao)12V,24V。而母(mu)線(xian)電(dian)(dian)壓(ya)多(duo)為(wei)24V,因此需要(yao)(yao)進行電(dian)(dian)壓(ya)轉(zhuan)換(huan)。
3、輸(shu)出穩(wen)定、母線電壓(ya)在長距離傳(chuan)輸(shu)過程中(zhong)會存在線損,故到(dao)PCB板級時電壓(ya)較低,而負(fu)載需要穩(wen)定的電壓(ya),因(yin)此需要寬壓(ya)輸(shu)入,穩(wen)壓(ya)輸(shu)出。
4、具(ju)備保(bao)護功能,電源需要在異常情(qing)況(kuang)下,保(bao)護系統的(de)負載(zai)和(he)本身不壞。