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href="http://www.520peixun.com/products/category-74/">合金電阻</a></strong>在設備中起著電流檢測或保護的作用。并有較大的封裝或采用多重并聯和以滿足大電流采樣的要求常用的<a href="http://www.520peixun.com"><strong>采樣電阻</strong></a>從0805封裝到2512封裝不等。1206封裝和分別用于usb-c輸出電流檢測和電池電流檢測的移動電源和快速充電充電器的<strong>貼片合金電阻</strong>。</span></span></span> <div style="text-align: center;"><img alt="貼片合金電阻，采樣精密合金電阻" src="/u_file/2201/photo/2201/2022012323313524.jpeg" style="height: 224px; width: 350px;" title="貼片合金電阻，采樣精密合金電阻" /></div> <span style="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;"> 充電器的核心是安全。只有安全的充電器才能放心使用。<br /> 為什么快速充電需要過流保護<br /> 在充電器中，除了防止設備熱擊穿的過熱保護外，主要保護功能是過電流保護。過流保護用于限制流經初級階段的電流，這由控制器實現。在開始的時候用于限制輸出功率和防止流經初級開關的電流超過開關的安全操作區域和導致充電器初級設備損壞。<br /> 二次過流保護由輸出過流保護協議芯片實現。通常，USB PD供電設備將根據信息中給出的參數調整最大輸入電流，該電流不會超過充電器信息的電流。然而，充電器內部二次側的過電流保護功能仍然是必要的，以防止其他風險，如過熱或短路電纜導致的連接器損壞。<br /> 圖為USB PD快速充電電路圖。紅色框中的R12是一次電流采樣電阻，R7是二次采樣電阻?？刂破魍ㄟ^檢測電阻上的電壓降來計算電流。觸發保護動作當電阻上的電壓降超過閾值時并根據電流值選擇不同的保護功能。</span></span></span> <hr /><span style="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;">?方案推薦： <a href="http://www.520peixun.com/products/category-159/"><strong>光頡合金電阻</strong></a></span></span></span><a href="http://www.520peixun.com/products/category-159/"><strong><img src="/u_file/2205/photo/2205/2022051714053670.png" /></strong></a> </div> <div id="page" class="wow fadeInUp wrap"> <div class="prev fl">上一篇 : <a href="/info/news-i01926i1.html">解釋一次性溫控貼片保險絲選擇中的常見參數和術語</a></div> <div class="next fr">下一篇 : <a href="/info/news-i01924i1.html">精密合金貼片電阻為什么能成為電器的重要組成部分？</a></div> <div class="clear"></div> </div> <div class="returns"> <a href="/info/category-6/page-4.html" class="returns"><img oncontextmenu="return false;" src="/images/return.png" /> 返回列表</a> </div> <div class="relate-title">相關新聞</div> <div class="relate-list"> <div class="list fl"> <div class="list-title fl text-over"><span>» </span><a href="/info/news-i01939i1.html">保險絲斷開容量在實際應用中的意義是什么</a></div> <div class="list-time 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