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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> 講解“TVS二極管原理”及選用時“考慮因素”有哪些 </h1> <div class="meg"> <div class="firsts">發布時間：2021-10-08</div> <div class="">已被瀏覽：<span>1556</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%;"><a href="http://www.forsakring-online.com/products/category-470/"><span style="color:#FF0000;"><strong>TVS二極管</strong></span></a>工作原理<br /> 在規定的反向應用條件下，當承受高能瞬時過壓脈沖時，其工作阻抗可立即降至很低的導通值，允許大電流通過，并將電壓限制到預定水平。從而有效保護電子線路中的精密元件免受損壞。TVS能承受的瞬時脈沖功率可達數千瓦，其鉗位響應時間僅為1ps(10-12S)。TVS允許的正向浪涌電流在T=25℃、T=10ms的條件下達到50~200A。雙向TVS可以在正反方向吸收瞬時大脈沖功率，將電壓限制到預定水平。雙向TVS適用于交流電路，單向TVS一般用于DC電路。<br /> <img alt="講解“TVS二極管原理”及選用時“考慮因素”有哪些" src="/u_file/2104/photo/2104/2021040717342770.jpeg" /><br /> TVS二極管選用需考慮因素<br /> （1）如果TVS可能承受來自兩個方向的峰值脈沖電壓(浪涌電壓)的沖擊，則應選擇雙極性，否則可選擇單極性；<br /> （2）TVS的VC值應低于被保護元件的高電壓。VC是二極管在截止狀態下的電壓，即在ESD沖擊狀態下通過TVS的電壓。它不能大于被保護電路的極*電壓，否則設備將面臨損壞的危險；<br /> （3）TVS在正常工作狀態下不應處于擊穿狀態，優秀在VR以下，應綜合考慮VR和VC的要求，選擇合適的TVS；<br /> （4）如果你知道更準確的浪涌電流IPP，你可以使用VCIPP來確定功率；如果不能確定IPP的一般范圍，最好選擇功率較大的TVS；<br /> （5）TVS能承受的瞬態脈沖不重復，設備規定的脈沖重復頻率(持續時間與間歇時間之比)為0.01%。如果電路中出現重復性脈沖，應考慮脈沖功率的積累，否則可能會損壞TVS；<br /> （6）對于小電流負載的保護，可以有意識地在線路中增加限流電阻。只要限流電阻的電阻值合適，一般不會影響線路的正常運行，但限流電阻對干擾的電流會大大降低。但是，可以選擇峰值功率較小的TVS管來保護小電流負載線路；<br /> （7）電容C是由TVS雪結決定的，這是由特定的1-hz頻率決定的。因此，C是數據接口電路選擇TVS的重要參數。數據/信號頻率越高，二極管電容對電路的干擾越大，形成噪聲或衰減信號強度越大。因此，所選設備的電容范圍需要根據電路的特性來確定。一般來說，電容應盡可能選擇高頻電路(如LCTVS小于3pp)。電容要求不高于40pp；<br /> （8）為了滿足IEC61000-4-2的國際標準，TVS二極管必須達到可接觸的小*必須是k(接觸)(接觸)和15英鎊(空氣)；<br /> <br /> 以上內容主要介紹tvs二極管原理及選用時考慮因素，如需要TVS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-i01571i1.html">分享“TVS選型”及“應用”篇</a></div> <div class="page-btn next">下一篇 : <a href="/faq/news-i01417i1.html">淺談TVS二極管三大應用特點及注意事項</a></div> </div> <div class="returns"> <a href="/faq/category-15/page-1.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 class="relate-list"> <div class="list fl"> <div class="list-title fl text-over"><span>» </span><a href="/faq/news-i01572i1.html">一篇關于“MOS管選型”指南</a></div> <div class="list-time fr text-right">2021-10-08</div> <div class="clear"></div> </div> <div class="list fl"> <div 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