一、dcdc電源模塊原理是什么
dcdc電(dian)(dian)(dian)源模(mo)塊原理(li):假設Q為(wei)(wei)(wei)開(kai)關(guan)管(guan),L為(wei)(wei)(wei)儲(chu)能電(dian)(dian)(dian)感(gan)(gan),D為(wei)(wei)(wei)整流(liu)(liu)管(guan),C為(wei)(wei)(wei)濾波電(dian)(dian)(dian)容,RL為(wei)(wei)(wei)負載(zai)。當煽動脈沖(chong)為(wei)(wei)(wei)高電(dian)(dian)(dian)往(wang)常,開(kai)關(guan)管(guan)Q豐滿(man)導通,整流(liu)(liu)管(guan)D截(jie)止(zhi),輸(shu)入(ru)電(dian)(dian)(dian)壓(ya)加在電(dian)(dian)(dian)感(gan)(gan)L上(shang),電(dian)(dian)(dian)感(gan)(gan)L以磁能辦(ban)法存儲(chu)能量,當Q截(jie)止(zhi)時(shi)期(qi),整流(liu)(liu)管(guan)D導通,電(dian)(dian)(dian)感(gan)(gan)L貯存的(de)能量經D開(kai)釋,在電(dian)(dian)(dian)容C兩頭發作(zuo)直流(liu)(liu)電(dian)(dian)(dian)壓(ya),然后(hou)為(wei)(wei)(wei)負載(zai)RL供應供電(dian)(dian)(dian)電(dian)(dian)(dian)源。在給定(ding)條件下,輸(shu)出端電(dian)(dian)(dian)壓(ya)的(de)凹(ao)凸由Q的(de)豐滿(man)導通時(shi)刻(ke)長短(duan)挑選(xuan),即由基極所加煽動電(dian)(dian)(dian)壓(ya)的(de)脈沖(chong)寬(kuan)度挑選(xuan)。
二、dcdc電源模塊的優點有哪些
1、采用(yong)隔(ge)離式設計,可以有效(xiao)的隔(ge)離來(lai)自一次(ci)側設備帶(dai)來(lai)的共(gong)模干擾對系統(tong)的影(ying)響(xiang),使負載能夠穩定的工作。
2、可以進行(xing)電(dian)(dian)壓(ya)(ya)轉換(huan),不同的(de)負載(zai)需(xu)要不同的(de)供電(dian)(dian)電(dian)(dian)壓(ya)(ya),例(li)如控制(zhi)IC需(xu)要5V、3.3V、1.8V等;信號采集用的(de)運放(fang)則需(xu)要±15V;繼電(dian)(dian)器則需(xu)要12V,24V。而母線(xian)電(dian)(dian)壓(ya)(ya)多為24V,因此需(xu)要進行(xing)電(dian)(dian)壓(ya)(ya)轉換(huan)。
3、輸(shu)出(chu)穩定、母線電壓(ya)在長距離傳(chuan)輸(shu)過程中會存(cun)在線損,故到(dao)PCB板級時電壓(ya)較低,而負載需(xu)要(yao)穩定的(de)電壓(ya),因此需(xu)要(yao)寬壓(ya)輸(shu)入(ru),穩壓(ya)輸(shu)出(chu)。
4、具備保護(hu)功能,電(dian)源需要(yao)在異常情(qing)況下,保護(hu)系統(tong)的負載和本身不(bu)壞。