一、dcdc電源模塊原理是什么
dcdc電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)模塊原理(li):假設Q為開(kai)關管(guan)(guan)(guan),L為儲(chu)能(neng)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan),D為整流(liu)管(guan)(guan)(guan),C為濾波電(dian)(dian)(dian)(dian)(dian)(dian)容,RL為負載。當煽(shan)動脈(mo)沖為高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)往常(chang),開(kai)關管(guan)(guan)(guan)Q豐滿(man)導通,整流(liu)管(guan)(guan)(guan)D截止,輸入電(dian)(dian)(dian)(dian)(dian)(dian)壓加在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)L上,電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)L以磁能(neng)辦法(fa)存儲(chu)能(neng)量,當Q截止時期,整流(liu)管(guan)(guan)(guan)D導通,電(dian)(dian)(dian)(dian)(dian)(dian)感(gan)L貯存的(de)(de)能(neng)量經D開(kai)釋,在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)容C兩頭發作直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)壓,然后為負載RL供應供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)。在(zai)給定條件(jian)下,輸出端電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)凹(ao)凸由Q的(de)(de)豐滿(man)導通時刻長(chang)短挑選(xuan),即由基極所加煽(shan)動電(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)脈(mo)沖寬(kuan)度挑選(xuan)。
二、dcdc電源模塊的優點有哪些
1、采用隔離式設計,可(ke)以有效的(de)(de)隔離來自一(yi)次側(ce)設備(bei)帶(dai)來的(de)(de)共模干擾對系統的(de)(de)影響,使負載能夠穩定的(de)(de)工作。
2、可以(yi)進行(xing)電壓(ya)(ya)轉換,不同的負載需(xu)要(yao)不同的供(gong)電電壓(ya)(ya),例如控制IC需(xu)要(yao)5V、3.3V、1.8V等;信號采集用的運放則需(xu)要(yao)±15V;繼電器則需(xu)要(yao)12V,24V。而(er)母線電壓(ya)(ya)多為24V,因此(ci)需(xu)要(yao)進行(xing)電壓(ya)(ya)轉換。
3、輸(shu)出穩定(ding)、母(mu)線電(dian)壓(ya)(ya)(ya)(ya)在長距(ju)離傳(chuan)輸(shu)過程中會存在線損,故(gu)到PCB板(ban)級(ji)時電(dian)壓(ya)(ya)(ya)(ya)較低,而(er)負載需要(yao)穩定(ding)的電(dian)壓(ya)(ya)(ya)(ya),因此需要(yao)寬壓(ya)(ya)(ya)(ya)輸(shu)入,穩壓(ya)(ya)(ya)(ya)輸(shu)出。
4、具備保護功能(neng),電源需要(yao)在異常情況下,保護系(xi)統的(de)負(fu)載和本身不壞(huai)。