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basicInfoTitle
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Product Spec Banner
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RT8543A 是高效率的白光 LED 驱动器，设计用于驱动作为 LCD 屏光源的 LED 阵列。集成了功率开关的电流模式 Boost 转换器可驱动6串并联连接的 LED 串，每串可有多达10只 LED 连接在一起。每个内置电流源支持最大 ±2% 的电流误差，确保每串 LED 都有优异的亮度一致性。为了提供足够的操作余量给每个电流源， Boost 控制器对每个回馈端子进行监控并调节至最优化之输出电压以获取最好之效率。</br> RT8543A 可以 2.5V~24V 之宽阔的输入电压范围输出 5mA~50mA 可调之电流，内部 200mΩ、43V功率开关以电流模式控制方式提供逐周期过流保护，还集成了 PWM 和模拟调光功能以取得精确的 LED 电流控制。PWM 调光信号的频率范围在 100Hz~20kHz 之间，调光时不会在 LED 中感应冲击电流或是感应器。</br>RT8543A 的封装为 WQFN-20L 4x4。
RT8543A 电路图
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basicInfoImageSection
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productDetailSection
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buttonFindOtherCategory
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<div class="spec-list"><ul class="lv1"><li>宽输入电压范围： 2.5V~24V </li><li>高输出电压：V<sub>OUT</sub> 高达 43V </li><li>电流模式升压调节器 <ul class="lv2"> <li></li><li>600kHz~1.2MHz开关频率 </li><li>频率高达85% </li></ul> </li><li>可调节电流范围：5mA~50mA ；匹配误差：2% </li><li>通道电流调整精度：±3% </li><li>调光控制 <ul class="lv2"> <li></li><li>直接 PWM 调光频率高达 20kHz，最小导通时间为500ns </li><li>PWM 转“类比+PWM”混合式调光，信号频率可高达 20kHz，最高解析度可达8位 </li></ul> </li><li>无需外部电容，内建软起动避免冲击电流 </li><li>关机模式下断开 LED 连接 </li><li>保护 <ul class="lv2"> <li></li><li>LED 串开路保护 </li><li>电流限制保护 </li><li>可调节过压保护 </li><li>过温保护 </li></ul> </li><li>20引脚 WQFN 封装 </li><li>符合 RoHS 规范，不含卤素 </li></ul></div>
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productFeatureSection
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orderingInformationSection
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RT8543A 订购信息
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productSection
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evbSection
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orderingDetailSection
technical-documents
RT8543A
technicalDocumentMultipleTable
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technicalDocumentationSection
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RT8543A
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designToolSection
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rt-blue-800
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24
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<div class="spec-list"><ul class="lv1"><li>笔记型电脑背光源 </li></ul></div>
applicationContent
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35
keywordList
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56
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applicationSection
rt-blue-800
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supportCards
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i18n(support-card-item.technical-support.learn-more-text)
i18n(support-card-item.technical-support.url)
technicalSupportCard
i18n(support-card-item.ordering.title)
i18n(support-card-item.ordering.description)
i18n(support-card-item.ordering.learn-more-text)
i18n(support-card-item.ordering.url)
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i18n(support-card-item.sales.description)
i18n(support-card-item.sales.learn-more-text)
i18n(support-card-item.sales.url)
salesSupportCard
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fixed-width
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