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MOSFETS </a> </div> </div> <ul class="info_list"> <li class="item relative wow fadeInUp" data-wow-delay="0s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-10</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01572i1.html">一篇關于“MOS管選型”指南</a> </div> <div class="brief text-line trans"> MOS管選型 MOS管選型的第一步是確定是使用P溝道MOS管還是N溝道MOS管。這兩種MOS管驅動電壓完全不同。由于制造工藝的原因，P溝的MOS管通常比N溝的MOS管具有更大的導通電阻，這意味著導通功耗會更大。這是選擇時需要注意的地方。一般而言，如果是低邊開關應用，使用N溝MOS管是首選，驅動方便，選擇靈活。如果是高邊開關應用，P溝MOS管驅動相對簡單，但導通電阻相對較大，價格相對較高。N溝MOS管驅動比較復雜，一般需要額外的電源或者自動驅動。在選擇MOS管類型后，根據以下參數具體步驟進行選擇。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.1s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-10</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01571i1.html">分享“TVS選型”及“應用”篇</a> </div> <div class="brief text-line trans"> TVS選型及應用（1）TVS是用來防護浪涌電流的，如果知道要防護的最大電流Ipp最好。選型時首先確定TVS的Ipp；（2）再其次確定待防護電路的直流電壓或持續工作電壓。如果是交流電，應計算出最大值，即用有效值*1.414；（3）根據2中已知工作電壓，選擇TVS的Vrwm，要求Vrwm要大于工作電壓，否則工作電壓大于Vrwm會導致TVS反向漏電流增大，接近導通，或者雪崩擊穿，影響正常電路工作。（4）所選TVS的最大箝位電壓Vc不能大于被防護電路可以承受的最大電壓。否則，當TVS鉗在Vc時會對電路造成損壞；（5）其中2-4步可以先于1，如果不知Ipp，可以根據信號的功率確定Ipp；（6）單極性還是雙極性-常常會出現這樣的誤解即雙向TVS用來抑制反向浪涌脈沖，其實并非如此。雙向TVS用于交流電或來自正負雙向脈沖的場合。TVS有時也用于減少電容。如果電路只有正向電平信號，那麼單向TVS就足夠了。TVS操作方式如下：正向浪涌時,TVS處于反向雪崩擊穿狀態；反向浪涌時，TVS類似正向偏置二極管一樣導通并吸收浪涌能量。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.2s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-10</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01570i1.html">講解“TVS二極管原理”及選用時“考慮因素”有哪些</a> </div> <div class="brief text-line trans"> TVS二極管工作原理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。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.3s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">05</span> <span class="ym">2021-08</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" 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 class="brief text-line trans"> 瞬態電壓抑制器，簡稱TVS二級管，是一種二極管形式的高性能保護設備，有的文獻上也稱為TVP、AJTVS、SAJTVS等。當TVS二極管的兩極受到反向瞬態高能量沖擊時，它可以以10-12秒的速度將兩極之間的高阻抗變成低阻抗，并吸收數千瓦的浪涌功率。將兩極之間的電壓鉗位在預定值，有效地保護電子線路中的精密部件，以免損壞各種浪涌脈沖。TVS二級管具有響應時間快、瞬態功率大、漏電流低、破壞電壓偏差小、容易控制鉗位電壓、無破壞極限、體積小等優點。目前廣泛應用于計算機系統、通信設備、交流/DC電源、汽車、家用電器、儀器儀表等領域。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.4s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">05</span> <span class="ym">2021-08</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01416i1.html">談談TVS瞬態抑制二極管及壓敏電阻的特點與優勢</a> </div> <div class="brief text-line trans"> TVS管英文稱：TransientVoltageSuppresser，全稱：瞬態電壓抑制器，是一種新型高效電路保護裝置，響應時間快，浪涌吸收能力強。當兩端受到瞬間高能沖擊時，TVS管可以以極高的速度將兩端之間的阻抗值從高阻抗變為低阻抗，吸收瞬間的大電流，將兩端的電壓鉗在預定的數值上。從而保護后面的電路元件免受瞬態高壓峰脈沖的沖擊。正因為如此，TVS管可以用來保護設備或電路免受靜電、電感負載切換時產生的瞬時變壓和感應雷產生的過電壓TVS管是瞬時變壓抑制器的簡稱。 </div> </div> <div class="clear"></div> </li>  </ul> </div> <div class="wrap"> <div class="blank50"></div> <div id="turn_page"><span><font class='page_noclick'><em class='icon_page_prev'></em> 上一頁</font></span><span class='haha'><font class='page_item_current'>1</font></span><span class='haha2'><a href='/faq/category-0015/page-2.html' class='page_item'>2</a></span><span class='page_last'><a href='/faq/category-0015/page-2.html' 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