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RT8575 是一款支持40V I/O 接口的高效率 LED 驱动器，设计用于驱动一个 LED 数组作为 LCD 屏的背光源。它包含一个电流模式 Boost 转换器，用于驱动多达4个并联连接的 LED 串，每串 LED 可以是多达18只 LED 的串联，与每串 LED 连接的电流源的吸入电流匹配误差在最大 ±1% 以内，确保各 LED 串之间的亮度一致性。为了给电流源吸入电流的操作预留足够的空间，Boost 控制器对各个回馈引脚中的最低电压进行监测并进行调节，同时确保得到一个最优的转换效率。RT8575 的输入电压范围为 4.2V~24V ，可输出 50mA~150mA 可调的 LED 电流，其内部功率开关的导通电阻为 150mΩ ，耐压为 60V ，工作在电流模式的控制器提供逐周期的过流保护，集成化的 PWM 调光功能可实现精确的 LED 电流控制。 PWM 输入调光信号的频率范围可在 120Hz~1kHz 之间进行选择，调光过程不会导致 LED 上的冲击电流和电感上的冲击电流。功率开关的切换频率也是可调的，其范围为 150kHz~500kHz，这使得效率和组件尺寸的选择可以很灵活。RT8575 的封装有 WDFN-16L 和 DIP-16(BW) 两种可供选择。
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<div class="spec-list"><ul class="lv1"><li>输入电压范围：4.2V~24V </li><li>最高输出电压：60V </li><li>可调工作频率范围： 150kHz~500kHz </li><li>支持多达4串 LED 负载 </li><li>1% 的 LED 电流精度 </li><li>1% 的 LED 电流一致性 </li><li>可程序设计过压保护 </li><li>内建软启动、过温保护功能 </li><li>LED 短路/开路检测 </li><li>符合 RoHS 规范，不含卤素 </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>White LED Backlighting </li></ul></div>
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