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buttonDatasheet
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buttonContactUs
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basicInfoSubtitle
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RT8577A 是4通道的 LED 驱动器，每个通道的输出能力高达 120mA 。它是一个输入电压范围为 5.5V~40V 、可通过 RT 引脚对工作频率进行 200kHz~2.1MHz 调节的电流模式 Boost 转换器。</br>其 PWM 输出电压调节回路选择 LED 串电压最高的通道的 LED 引脚作为电压回馈点并使之稳定在 0.6V ，借此确保各通道 LED 串电压不一致的情况下仍能获得稳定的电流输出。RT8577A 自动对各 LED 串进行开路、断路检测并自动断开有问题通道的电路连接以避免输出电压 V<sub>OUT</sub> 出现过压状况。各 LED 通道的电流可通过一只电阻进行设定，各通道之间的电流一致性误差在1.5%以内。通过将 PWM 信号施加在 PWM 引脚上可以获得具有极高对比的真数位 PWM 调光效果。</br>当出现不正常状态如开路、短路和过热时，一个状态信号将被传送给系统以实现关机进行问题处理的机会。
RT8577A 电路图
anchor
productDetailSection
i18n(anchor-tab.product-detail-section.title)
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orderingInformationSection
i18n(anchor-tab.ordering-information-section.title)
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technicalDocumentationSection
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designToolSection
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applicationSection
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supportSection
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i18n(tabs.product-detail.title)
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i18n(tab-item.product-feature-section.title)
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buttonSeeProductDifferences
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buttonFindOtherCategory
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scrollable-table
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<div class="spec-list"><ul class="lv1"><li>宽输入电压范围： 5.5V~40V </li><li>Boost 转换器的工作频率可在 200kHz~2.1MHz 之间进行调节 </li><li>可程式设计输出电流 </li><li>通道间电流一致性误差：±1.5% </li><li>外部调光控制 </li><li>Boost MOSFET 开关过流保护 </li><li>自动 LED 开路、短路保护以防范输出过压 </li><li>VCC 欠压锁定保护 </li><li>可调过压保护 </li><li>欠压保护 </li><li>热关机保护 </li><li>开路、短路、过热等异常状态指示 </li><li>AEC-Q100 Grade 3认证 </li><li>符合 RoHS 规范，不含卤素 </li></ul></div>
24
24
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i18n(tabs.ordering-information.title)
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i18n(tab-item.ordering-detail-section.title)
orderingDetailSection
orderingDetailSectionTab
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productImageSwitcher
RT8577A 订购信息
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products
productTable
evbImageSwitcher
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technical-documents
RT8577A
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design-tools
RT8577A
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rt-blue-800
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<div class="spec-list"><ul class="lv1"><li>汽车资讯娱乐 </li><li>LCD TV, 显示器背光 </li><li>LED驱动器应用 </li><li>通用恒定电流源 </li></ul></div>
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keywordList
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salesSupportCard
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32