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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> 一文讀懂TVS瞬態抑制二極管單雙方向區分及不同點 </h1> <div class="meg"> <div class="firsts">發布時間：2021-08-04</div> <div class="">已被瀏覽：<span>4722</span>次</div> <div class="shape"> <span>分享到：</span> <div class="bdsharebuttonbox" style="display:inline-block;vertical-align:middle;"><a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空間"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人網"></a></div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script> </div> </div> </div> <div class="con"> <span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">前言：<a href="http://www.forsakring-online.com/products/category-470/"><span style="color:#FF0000;"><strong>TVS管</strong></span></a>又叫瞬態電壓抑制二極管，英文稱：Transient Voltage Suppressor；簡稱TVS，是一種二極管形式的高效能保護器件。一旦確認客戶的產品需要防止過高的電壓和瞬態浪涌，相信大多數工程師會優先考慮TVS瞬態抑制二極管是否能滿足客戶產品的保護要求。而直流保護一般采用單向TVS管，交流保護一般采用雙向TVS管，多路保護采用TVS陣列元件，大功率保護采用TVS專用保護模塊。<br /> <img alt="一文讀懂TVS瞬態抑制二極管單雙方向區分及不同點" src="/u_file/2104/photo/2104/2021040717342770.jpeg" /><br /> 但是相比其他的電路保護器件直接的選型應用，TVS二極管在測試前還是先區分其單雙向。雖然最終作用相同，但是單向和雙向TVS二極管的適用范圍仍然不同。雙向TVS二極管適用于交流電路，單向TVS二極管一般用于直流電路。而初學者工程師剛接觸TVS二極管時，是沒辦法迅速區分TVS二極管的單向和雙向。而這篇文章則整理了快速區分TVS瞬態抑制二極管的單向和雙向資料。<br /> <br /> 一、區分TVS瞬態抑制二極管單雙向<br /> （1）看型號。僅從型號表面就可以判斷，不同品牌的命名方法不同，但有規律。<br /> （2）閱讀規格書時通常在第一頁。雙向是雙向導通，單向是單向導通。<br /> （3）用萬用表測，測量二極管的檔位，單向一邊通，雙向兩邊都有電壓; 測直流，雙向對稱，單向只有反向是雪崩擊穿特性，一般1mA下測。<br /> （4）所有TVS管放大后都會有陰極線，用于區分二極管的正負極，與單向和雙向無關。<br /> <br /> 二、TVS瞬態抑制二極管單雙向使用上不同點<br /> （1）單向TVS二極管用于直流，并且只能保護正脈沖或負脈沖；而雙向TVS二極管用于交流；用于保護裝置的一端與要保護的線路連接，一端接地，無論是從反向還是從正向ESD脈沖釋放，更有效地保護集成電路。<br /> （2）TVS管有單向與雙向之分，單向TVS管的正向特性與普通穩壓二極管相同，反向擊穿拐點處近似“直角”的硬擊穿為典型的PN結雪崩。當有瞬時過壓脈沖時，器件的電流急驟增加而反向電壓則上升到箝位電壓值，并保持在這一水平上;雙向TVS管的V-I特性曲線如同兩只單向TVS“背靠背”組合，其正反兩個方向都具有相同的雪崩擊穿特性和箝位特性，正反兩面擊穿電壓的對稱關系為0.9≤VBR(正)/VBR (反) ≤1.1。一旦加在它兩端的干擾電壓超過箝位電壓Vc就會立刻被抑制掉。<br /> （3）極間電容Cj，單向的比雙向的大，以LRC的為例，單向的電容C有65PF，雙向的只有15PF;<br /> （4）USB數據線上全部用的雙向;<br /> （5）電流曲線不同。單方向的TVS管的電路符號與普通的穩壓管相同，其正向特性與普通二極管相同，反向特性為典型的PN結雪崩器件。雙向二極管正反向都是典型的PN結雪崩器件。<br /> <br /> 拓展相關資料：<br /> 雙向TVS二極管能不能用單向TVS二極管來用<br /> TVS管在市場上的應用范圍更廣，在產品單價上基本沒有差別，關鍵參數電容C越低越好，導致電子市場和小型工廠普遍采用雙向TVS管。但是通過以上分析比較，單向TVS二極管和雙向TVS二極管有很多不同，當然很多地方可以用雙向TVS二極管代替單向TVS二極管，但是最重要的是看項目的電路設計，有些只能用單向TVS二極管。<br /> <br /> 以上內容主要介紹TVS瞬態抑制二極管單雙方向區分及不同點，如需要TVS瞬態抑制二極管相關產品請留言聯系或<span style="color:#FF0000;">撥打：0755-28100016；</span>海量TVS瞬態抑制二極管現貨庫存，規格齊全。歡迎來咨詢價格或拿樣測試。<br /> <br /> 深圳順?？萍加邢薰臼且患乙源頌橹鞯碾娮釉骷?、半導體器件、保護器件的整合供應商，主營TVS瞬態抑制二極管、ESD靜電保護器、GDT陶瓷氣體放電管、TSS半導體放電管、NTC熱敏電阻、壓敏電阻、保險絲、合金電阻、貼片電阻、精密電阻、晶圓電阻、貼片保險絲、自恢復保險絲、貼片電容、鉭電容、電解電容、鋁電解電容、超級電容、連接器等相關產品線，品牌可選華德、碩凱、薩瑞微、億能、特思嘉、基美(KEMET)、天二、旺詮、大毅、村田、太誘、TDK、AVX、威世、風華、華新科、三瑩、國巨、立隆、厚聲、光頡、順絡、麥捷、禾伸堂等知名品牌。</span></span></span> </div> <div id="page" class="wow fadeInUp wrap"> <div class="page-btn prev">上一篇 : <a href="/faq/news-i01410i1.html">了解TSS半導體放電管基本知識一篇就夠</a></div> </div> <div class="returns"> <a href="/faq/category-15/page-2.html" class="returns"><img oncontextmenu="return false;" src="/images/return.png" /> 返回列表</a> </div> <div class="relate-title">相關知識解答</div> <div 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