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TVS二極管SMCJ36CA在DC24V電源防護中的應用

Update time:2019-05-04

對于經常跟電路保護元器件打交道的電子工程師而言,TVS瞬態抑制二極管型號、選型、應用、使用注意事項等方面知識必然是了然于胸。然而對于踏入電子行業的初級電子工程師和采購商而言,必要存在那么一段提升自我的學習歷程。關于SMCJ36CA,TVS管SMCJ系列常用型號之一,您知道多少?它是如何保護DC24V電源系統的?哪家廠家生產的SMCJ系列瞬態抑制二極管好呢?

QQ圖片206.jpg

SMCJ系列(lie)TVS二極管規格特點

東沃電(dian)(dian)子(zi)SMCJ系列TVS瞬態(tai)(tai)抑制二極(ji)管,其峰值脈沖功率為1500W,反(fan)向關態(tai)(tai)電(dian)(dian)壓值5.0V-440V,電(dian)(dian)壓誤差控(kong)制在(zai)5%上下,響(xiang)應速度ps級(ji),優良的電(dian)(dian)壓箝(qian)位能(neng)力,低漏電(dian)(dian)流,玻(bo)璃鈍化結,高可(ke)(ke)靠性,小尺寸DO-214AB封裝,可(ke)(ke)高溫焊接,無鹵素,符合ROHS標(biao)準,可(ke)(ke)提供單雙向兩種(zhong)TVS管產(chan)品選擇。

SMCJ系列型號詳(xiang)情:SMCJ5.0A/CA、SMCJ6.0A/CA、SMCJ6.5A/CA、SMCJ7.0A/CA、SMCJ7.5A/CA、SMCJ8.0A/CA、SMCJ8.5A/CA、SMCJ9.0A/CA、SMCJ10A/CA、SMCJ11A/CA、SMCJ12A/CA、SMCJ13A/CA、SMCJ14A/CA、SMCJ15A/CA、SMCJ16A/CA、SMCJ17A/CA、SMCJ18A/CA、SMCJ19A/CA、SMCJ20A/CA、SMCJ22A/CA、SMCJ24A/CA、SMCJ26A/CA、SMCJ28A/CA、SMCJ30A/CA、SMCJ33A/CA、SMCJ36A/CA、SMCJ40A/CA、SMCJ43A/CA、SMCJ45A/CA、SMCJ48A/CA、SMCJ51A/CA、SMCJ54A/CA、SMCJ58A/CA、SMCJ60A/CA、SMCJ64A/CA、SMCJ70A/CA、SMCJ75A/CA、SMCJ78A/CA、SMCJ80A/CA、SMCJ85A/CA、SMCJ90A/CA、SMCJ100A/CA、SMCJ110A/CA、SMCJ120A/CA、SMCJ130A/CA、SMCJ140A/CA、SMCJ150A/CA、SMCJ160A/CA、SMCJ170A/CA、SMCJ180A/CA、SMCJ190A/CA、SMCJ200A/CA、SMCJ220A/CA、SMCJ250A/CA、SMCJ300A/CA、SMCJ350A/CA、SMCJ400A/CA、SMCJ440A/CA

DC24V電(dian)源防護方案詳解

其中,SMCJ18A、SMCJ24A、SMCJ24CA、SMCJ30CA、SMCJ33CA、SMCJ36CA、SMCJ48A、SMCJ48CA、SMCJ58A、SMCJ64CA等(deng)型號TVS管,是(shi)東沃電子熱(re)賣、熱(re)銷(xiao)產品。接下來,東沃電子為大家分享的(de)是(shi):SMCJ36CA在(zai)DC24V電源防護方案中的(de)應用:

1)應用背景:全球氣(qi)(qi)候(hou)變暖(nuan),使得雷雨天氣(qi)(qi)增加,倘若(ruo)DC24V電源安全防護措施做不(bu)到位(wei)的(de)話(hua),容易(yi)遭受雷擊損壞,危害大,維修成本(ben)高,就目前(qian)形勢(shi)而言,高浪涌防護電源成為了行業的(de)趨勢(shi)。

2)防護方案:防護電路圖

DC24V電路防護圖_副本.jpg

從電路(lu)圖可以(yi)看出,電路(lu)中所使用的東沃電子電路(lu)保護元器件有:

√  TVS管(guan):SMCJ36CA

擊穿電(dian)(dian)(dian)壓(ya)值(zhi)40V-44.2V,反向關態電(dian)(dian)(dian)壓(ya)值(zhi)36V,箝位(wei)電(dian)(dian)(dian)壓(ya)最大值(zhi)58.1V,瞬時峰值(zhi)脈沖電(dian)(dian)(dian)流(liu)25.82A;

√ GDT:2R230TP

直(zhi)流標(biao)稱(cheng)電壓(ya)230±20%V,沖(chong)擊電流(8/20μS)5KA,電容值<1.0pF,電阻>1GΩ;

√ GDT:2R230TP1

直流標稱電壓230±20%V,沖擊電流(8/20μS)2KA,電容值<1.0pF,電阻>1GΩ;

2.jpg

SMCJ36CA在DC24V電源(yuan)防護方案(an)中(zhong)的(de)應用

從上(shang)面的(de)(de)防護電(dian)(dian)路(lu)圖可以(yi)看出,前級(ji)電(dian)(dian)路(lu)防護采(cai)用(yong)的(de)(de)是通(tong)流量很大、體積較小的(de)(de)貼片(pian)陶瓷氣體放電(dian)(dian)管(guan),中(zhong)間采(cai)用(yong)的(de)(de)是電(dian)(dian)感L做退耦,促使GDT釋放大電(dian)(dian)流,后級(ji)采(cai)用(yong)的(de)(de)是響應速度ps級(ji)、殘壓(ya)很低的(de)(de)TVS瞬(shun)態抑制二極管(guan)SMCJ36CA。東沃電(dian)(dian)子DC24V電(dian)(dian)源方(fang)案,滿足IEC61000-4-5、GB/T17626.5等浪涌測試的(de)(de)同(tong)時(shi),還通(tong)過了1.2/50μs-8/20μs浪涌測試。

此電(dian)(dian)源(yuan)(yuan)(yuan)防護(hu)方案(an)(an)同樣適用在(zai):球機電(dian)(dian)源(yuan)(yuan)(yuan)、電(dian)(dian)源(yuan)(yuan)(yuan)適配器(qi)、LED電(dian)(dian)源(yuan)(yuan)(yuan)、音樂播放器(qi)、數碼相框電(dian)(dian)源(yuan)(yuan)(yuan)、車載(zai)電(dian)(dian)源(yuan)(yuan)(yuan)等(deng)其他DC24V供電(dian)(dian)電(dian)(dian)源(yuan)(yuan)(yuan)中。可見,市場對于SMCJ36CA需求極大,高品質的(de)(de)TVS管(guan)為(wei)電(dian)(dian)路安全保駕(jia)護(hu)航。欲想了解(jie)更(geng)多有關SMCJ36CA在(zai)電(dian)(dian)路中的(de)(de)設計方案(an)(an),東沃電(dian)(dian)子FAE工程師隨時為(wei)您服務!

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