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RT8306 是一款 48 通道高精度恒流 LED 驱动器，具备 12-bit PWM 控制，适用于 LED 背光的时序扫描应用。RT8306 具有 48 通道灵活 PWM 发生器，以及独立 12-bit PWM 亮度控制，可控制每个通道的 LED 电流。此外，它具备一个全局高精度 8-bit IDAC，可设置 LED 峰值电流。另有 48 个独立 8-bit DAC，可用于提升或降低 LED 电流，以支持高动态范围应用。<br /><br />LED 驱动器上的恒流灌入通道可灌入 60mA 电流，其电流水平可通过寄存器地址 0561 [7:0] 设置，范围为 5mA 至 60mA。RT8306 为每个通道提供 ±2% 的高精度电流。它亦支持通过独立 PWM 发生器进行局部调光与全局调光，并具备可编程 PWM 占空比、周期与延迟。此外，RT8306 提供动态余量控制 (DHC) 功能，可产生反馈信号至 DC-DC 控制环路并调节输出电压。<br /><br />RT8306 亦提供 LED 开路 / 短路保护。若任何通道发生开路或短路，FLT 引脚将被拉低，且输出通道将单独关闭。RT8306 采用 WQFN-72L 8x8 封装，可实现针对 PCB 空间优化的解决方案。
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<div class="spec-list"><ul class="lv1"><li>Wide Current Range : 5mA to 60mA </li><li>Programmable Channel Current (8-bit Resolutions) </li><li>Low Dropout Voltage : 400mV at 60mA </li><li>Support Dot Correlation Function </li><li>Support HDR Mode </li><li>Dimming Mode : <ul class="lv2"> <li></li><li>PWM Mode for Scan and Non-Scan Type </li><li>Direct PWM Mode </li><li>DC Mode </li></ul> </li><li>±2% Accuracy Current for Wide Current Range </li><li>LED Current Rising and Falling Slop Control </li><li>Fault Detection for LED Open/Short </li><li>Under-Voltage Lockout and Thermal Shutdown </li><li>Integrated Dynamic Headroom Control (DHC) </li><li>Support 1D/2D/3D Dimming (Programmable Channel Delay, Individual PWM Duty Control, Automatic VSYNC Synchronization) </li><li>25MHz Max SPI Interface with Daisy chain </li><li>Flexible Daisy-Chained SPI Interface </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>LCD TV, MNT Display Backlight </li><li>General Purpose Constant Current Source </li><li>Architectural and Decorative LED Lighting </li></ul></div>
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