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Product Spec Banner
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RT4831A是供可擕式設備使用的液晶屏偏置電源兼4通道WLED背光源驅動器，其WLED背光源驅動器可以最高29V電壓驅動4個並聯的WLED串，各串電流可用I<SUP>2</SUP>C介面和/或外部PWM輸入進行控制以獲得60μA~30mA的輸出，其解析度高達11位，可表現為指數或線性特性。供給液晶屏的偏置電源由一個Boost轉換器、一個線性穩壓器和一個實現極性反轉的電荷泵提供正、負壓輸出，其負載能力可達150mA，輸出電壓可經I<SUP>2</SUP>C介面在±4V~±6.5V之間以50mV的級差進行設定。RT4831A的封裝形式為WL-CSP-24B 1.84x2.68(BSC)。
RT4831A 電路圖
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<div class="spec-list"><ul class="lv1"><li>系統 <ul class="lv2"> <li></li><li>硬體使能引腳 </li><li>I<sup>2</sup>C控制介面 </li><li>過熱保護 </li></ul> </li><li>WLED背光源驅動器 <ul class="lv2"> <li></li><li>輸入電壓範圍：2.7V~5V </li><li>驅動多達4串並聯連接的WLED串 </li><li>輸出電壓最高29V </li><li>使用外部PWM輸入和I<sup>2</sup>C介面進行亮度控制 </li><li>11位元解析度的指數或線性亮度控制 </li><li>可程式控制的過壓保護 </li><li>可程式控制的過流保護 </li><li>自動工作頻率：250kHz, 500kHz, 1MHz </li><li>WLED電流增、減過程平滑順暢 </li></ul> </li><li>液晶屏偏置電源 <ul class="lv2"> <li></li><li>輸入電壓範圍：2.7V~5V </li><li>可程式控制正/負壓輸出範圍：±4V~±6.5V，級差50mV </li><li>可程式控制Boost輸出電壓範圍：4V~7.15V，級差50mV </li><li>負載能力：150mA </li><li>輸出短路保護 </li></ul> </li></ul></div>
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RT4831A 訂購資訊
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RT4831A
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RT4831A
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<div class="spec-list"><ul class="lv1"><li>多达32颗LED背光源的液晶屏 </li><li>智能手机 </li><li>平板电脑 </li></ul></div>
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