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RT8420是一款高效率的電流連續模式電感降壓轉換器，被設計用於從比LED串電壓高的電壓源對單只或多隻串聯連接的LED進行驅動，其工作電壓範圍是7V-50V，採用滯回式控制方式，使用高端電流檢測電阻對流過LED的電流進行參數設定。<BR>RT8420採用功率開關在低端、輸出電流檢測在高端的電路結構，只需一隻外接電阻即可對需要的平均輸出電流進行設定。LED的亮度可通過類比調光信號進行控制，當亮度百分比較低時，最高開關工作頻率會受到限制。<BR>RT8420採用具有外露散熱焊盤的MSOP-8和PSOP-8封裝，具有很好的散熱能力。
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<div class="spec-list"><ul class="lv1"><li>輸入電壓範圍：7V至50V </li><li>採用高端電流檢測方式的滯回式控制技術 </li><li>內部N-MOSFET的R<sub>DS(ON)</sub>為350mΩ </li><li>1.2A輸出能力 </li><li>效率高達97% </li><li>LED電流精準度為±5% </li><li>通過ADJ引腳進行模擬調光和PWM調光 </li><li>調光至低端時對最高開關工作頻率進行限制 </li><li>輸入欠壓鎖定保護 </li><li>熱關機保護 </li><li>符合RoHS規範，不含鹵素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>汽車LED照明 </li><li>大功率LED照明 </li><li>指示燈和應急照明 </li><li>建築照明 </li><li>低電壓工業照明 </li><li>招牌和裝飾LED照明 </li></ul></div>
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