22V雙向TVS二極管
發表日期:2021-12-24瀏覽:1274
有客(ke)戶問:工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)22V的(de)(de)瞬態抑制(zhi)(zhi)TVS二(er)(er)極管,有哪些型號?22V雙向TVS二(er)(er)極管,該(gai)怎么選(xuan)型選(xuan)用?同(tong)樣都是22V電(dian)(dian)(dian)壓(ya)TVS管,SMAJ22CA、SMBJ22CA、SMCJ22CA、SMDJ22CA、5.0SMDJ22CA之間又有什么區別(bie)……瞬態抑制(zhi)(zhi)二(er)(er)極管選(xuan)型過程中,其工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)是一個很(hen)關鍵的(de)(de)參數(shu),TVS管的(de)(de)工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)要大于被保護電(dian)(dian)(dian)路(lu)的(de)(de)最高工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)。在TVS工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)以(yi)(yi)下,TVS處(chu)于截(jie)止狀態,不導通(tong)的(de)(de),也不會影(ying)響電(dian)(dian)(dian)路(lu)的(de)(de)正常運行。TVS工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)低至(zhi)3.3V,高達600V,甚至(zhi)更(geng)高。目前業內把工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)大于200V成為高壓(ya)TVS,工(gong)(gong)(gong)作(zuo)(zuo)電(dian)(dian)(dian)壓(ya)200V以(yi)(yi)下均為低壓(ya)TVS。
那(nei)么(me),工(gong)作電壓22V的瞬(shun)態抑制TVS二極(ji)管(guan),有哪些型號呢(ni)?查看國產TVS廠商(shang)東沃電子(DOWOSEMI)供(gong)應的TVS二極(ji)管(guan)產品手冊可知,22V工(gong)作電壓TVS管(guan)常用(yong)型號有:
1)SOD-123封裝TVS:SMF22A、SMF22CA、TPSMF22A、SMF4L22A;
2)DO-214AC(SMA)封裝TVS:SMAJ22A、SMAJ22CA、TPSMAJ22A、TPSMAJ22CA、SMA6J22A、SMA6J22CA;
3)DO-214AA(SMB)封(feng)裝TVS:SMBJ22A、SMBJ22CA、TPSMBJ22A、TPSMBJ22CA、SMB10J22A、SMB10J22CA;
4)DO-214AB(SMC)封裝TVS:SMCJ22A、SMCJ22CA、TPSMCJ22A、TPSMCJ22CA、SMDJ22A、SMDJ22CA、TPSMDJ22A、TPSMDJ22CA、5.0SMDJ22A、5.0SMDJ22CA、TP5.0SMDJ22A、TP5.0SMDJ22CA;
5)P600(R-6)封(feng)裝TVS:3KP22A、3KP22CA、5KP22A、5KP22CA、LDP22A、LDP22CA、15KP22A、15KP22CA、20KP22A、20KP22CA;
6)DO-218AB封裝TVS:SM5S22A、SM6S22A、SM8S22A、SM8S22CA、SM8T22A、SM8T22CA;
……
從以上型號可以看出,其中尾綴后面A的是單向TVS,尾綴后面CA的是雙向TVS。具體如何選用,先來了解下SMAJ22CA、SMBJ22CA、SMCJ22CA、SMDJ22CA、5.0SMDJ22CA之間的區別,查看產品手冊會發現,這四個物料的工作電壓、擊穿電壓、鉗位電壓、漏電流都是一樣的,不同的是其封裝形式、峰值脈沖電流、峰值脈沖功率。不可否認,它們浪涌防護能力從大到小的排序是:5.0SMDJ22CA > SMDJ22CA > SMCJ22CA > SMBJ22CA > SMAJ22CA。那么,問題來了,TVS二極管(guan)選(xuan)型,是不是選浪涌防護能力越強的越好呢?
答案當然:不是。TVS二極(ji)管選型選用,是需要根據電路情況、保護需求、測試條件、成本預算等多方面因素來選擇。TVS具體選型,可直接咨詢東沃電子:136 7581 6901(微信同號)朱經理!