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RT8511B是可驱动多达10只串联的 WLED 的驱动器,由集成了43V/2.2A功率开关的电流模式 Boost 转换器构成,工作频率为固定的500kHz,工作电压范围为2.7V~24V,其输出给LED的电流可由一只电阻进行设定,回馈电压为 200mV (典型值)。在其工作期间,LED的电流可经由 PWM 进行控制,其责任周期决定了参考电压的值。为了进行调光,RT8511B可维持对 LED电流的稳定控制,不会在输出电容上生成音频噪声。它还具有可程序设计的过压保护引脚,可防止在LED开路期间的输出电压超过其绝对最大承受能力。RT8511B的封装为WDFN-8L 2x2。
宽输入电压范围:2.7V~24V
输出电压可高达 43V
PWM 调光控制信号的频率范围为 100Hz~8kHz
软启动和补偿电路全部内建
200mV 参考电压
有内部滤波器对 PWM 调光信号进行处理
可程序设计过压保护
有过温保护
有电流限制保护
8引脚 WDFN 封装
符合 RoHS 规范,不含卤素
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