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Cyntec電源適配器模快DC/DC電(dian)(dian)(dian)(dian)源(yuan)線適(shi)(shi)配器指電(dian)(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)(dian)壓(ya)轉(zhuan)變為電(dian)(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)(dian)壓(ya)的(de)電(dian)(dian)(dian)(dian)源(yuan)線適(shi)(shi)配器，從此基(ji)本(ben)概念上(shang)看，LDO(低(di)電(dian)(dian)(dian)(dian)壓(ya)差(cha)規則化電(dian)(dian)(dian)(dian)源(yuan)穩壓(ya)器)單(dan)片(pian)機芯片(pian)也理應歸到DC/DC電(dian)(dian)(dian)(dian)原(yuan)線，但應該只將電(dian)(dian)(dian)(dian)流(liu)調節到電(dian)(dian)(dian)(dian)流(liu)，且一種轉(zhuan)變方案(an)是(shi)過(guo)旋鈕方案(an)做完的(de)電(dian)(dian)(dian)(dian)原(yuan)線又(you)稱DC/DC交流(liu)電(dian)(dian)(dian)(dian)源(yuan)。

一(yi)個功率(lv)(lv)變換(huan)器，當輸(shu)入、負載和(he)控(kong)制均為固定(ding)值(zhi)時(shi)的(de)(de)工作(zuo)狀態，在(zai)開關電源中，被(bei)稱為穩態。穩態下(xia)，功率(lv)(lv)變換(huan)器中的(de)(de)電感(gan)(gan)滿意電感(gan)(gan)電壓伏秒(miao)(miao)平衡規律(lv)：對(dui)于(yu)已(yi)工作(zuo)在(zai)穩態的(de)(de)Cyntec電源模(mo)塊DC/DC功率(lv)(lv)變換(huan)器，有(you)源開關導通(tong)時(shi)加(jia)在(zai)濾波電感(gan)(gan)上的(de)(de)正向(xiang)伏秒(miao)(miao)必定(ding)等于(yu)有(you)源開關截至時(shi)加(jia)在(zai)該電感(gan)(gan)上的(de)(de)反向(xiang)伏秒(miao)(miao)。

Cyntec電源模塊DC/DC芯(xin)片主要是經過反饋電壓與內部基準電壓的的比較，然后調理MOS管驅動波形的占空比，來確保輸出電壓的安穩。

由于二極(ji)管導(dao)通時(shi)至少存(cun)在(zai)0.3V的(de)壓降，因此續流(liu)二極(ji)管D所耗(hao)費(fei)的(de)功率將會(hui)稱為DC/DC電源主要功耗(hao)，然后(hou)嚴(yan)重約束(shu)了效率的(de)提高(gao)。為處理該問題，以導(dao)通電阻極(ji)小的(de)MOS管替代續流(liu)二極(ji)管。然后(hou)經過控(kong)制器同(tong)時(shi)控(kong)制開(kai)關管和(he)同(tong)步整(zheng)流(liu)管，要確保兩(liang)個MOS管不能同(tong)時(shi)導(dao)通，負責將會(hui)發(fa)生短路。

Cyntec電源模塊DC/DC電路的硬件(jian)規劃(hua)參數挑選規范

1.設置輸出電壓(ya)：先(xian)挑(tiao)選合適的(de)R2,R2過(guo)小(xiao)會導(dao)致靜(jing)態電流過(guo)大，然后導(dao)致加(jia)大損耗；R2太(tai)大會導(dao)致靜(jing)態電流過(guo)小(xiao)，而導(dao)致FB引腳(jiao)的(de)反饋電壓(ya)對噪(zao)聲靈(ling)敏(min)，一般在數據(ju)手冊中(zhong)有推薦(jian)值規模(mo)參閱。

2.電(dian)(dian)(dian)(dian)(dian)感：電(dian)(dian)(dian)(dian)(dian)感的選(xuan)擇要(yao)滿意率(lv)終究(jiu)會輸出最窄標準規(gui)定(ding)感應(ying)功率(lv)時，電(dian)(dian)(dian)(dian)(dian)感感應(ying)功率(lv)也維持重復。在電(dian)(dian)(dian)(dian)(dian)感選(xuan)著時候中的需求(qiu)整理輸出感應(ying)功率(lv)、紋(wen)波、體(ti)積(ji)計算等兩個緣(yuan)由做好充(chong)分考慮。很(hen)大的的電(dian)(dian)(dian)(dian)(dian)感將引(yin)致較(jiao)小的紋(wen)波感應(ying)功率(lv)，后來(lai)引(yin)致較(jiao)低的紋(wen)波的電(dian)(dian)(dian)(dian)(dian)壓，僅是電(dian)(dian)(dian)(dian)(dian)感越大，將有著較(jiao)高的初中物(wu)理占地面積(ji)計算，較(jiao)高的串(chuan)連熱敏(min)電(dian)(dian)(dian)(dian)(dian)阻和(he)更低的飽(bao)和(he)感應(ying)功率(lv)。

3.輸(shu)出(chu)電(dian)(dian)容：輸(shu)出(chu)電(dian)(dian)容的(de)挑選(xuan)主要是依據規劃(hua)中所需求(qiu)的(de)輸(shu)出(chu)紋(wen)波(bo)(bo)的(de)要求(qiu)來進行選(xuan)取。電(dian)(dian)容發(fa)(fa)生(sheng)的(de)紋(wen)波(bo)(bo):相對(dui)很小，能夠忽略不(bu)計(ji);電(dian)(dian)容等效(xiao)電(dian)(dian)感發(fa)(fa)生(sheng)的(de)紋(wen)波(bo)(bo):在300KHz~500KHz以下，能夠忽略不(bu)計(ji)；電(dian)(dian)容等效(xiao)電(dian)(dian)阻(zu)發(fa)(fa)生(sheng)的(de)紋(wen)波(bo)(bo)：與ESR和流(liu)過電(dian)(dian)容電(dian)(dian)流(liu)成正比，該電(dian)(dian)流(liu)紋(wen)波(bo)(bo)主要是和開(kai)(kai)關(guan)(guan)管的(de)開(kai)(kai)關(guan)(guan)頻率有關(guan)(guan)，根(gen)本(ben)為開(kai)(kai)關(guan)(guan)頻率的(de)n次諧波(bo)(bo)，為了減(jian)少紋(wen)波(bo)(bo)，讓ESR盡量小。

鄭(zheng)州市立維創展科枝大部分能(neng)提供(gong)紅(hong)外光耗油率放小器基帶芯片和進囗(wei)的電源包(bao)塊(kuai)包(bao)塊(kuai)物料，加盟(meng)企業涵蓋AMCOM、PICO、Cyntec、CUSTOM MMIC、RF-LAMBDA、ADI、QORVO、MA-COM、SOUTHWEST東(dong)南紅(hong)外光等(deng)，立(li)維創展專業專注為的客(ke)戶具備高的品質、優安全性能、成本辦理公證(zheng)的紅(hong)外光元電子(zi)器件貨品。立(li)維創展授權管理經售(shou)商(shang)經售(shou)Cyntec長線產品，并且還為華人中國內地的市場展示 技術鼓勵。喜愛咨(zi)詢(xun)了解。