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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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<li class="mv5"> Wide Current Range : 5mA to 60mA<br /> </li><li class="mv5"> Programmable Channel Current (8-bit Resolutions)<br /> </li><li class="mv5"> Low Dropout Voltage : 400mV at 60mA<br /> </li><li class="mv5"> Support Dot Correlation Function<br /> </li><li class="mv5"> Support HDR Mode<br /> </li><li class="mv5"> Dimming Mode : <br /> ► PWM Mode for Scan and Non-Scan Type<br /> ► Direct PWM Mode<br /> ► DC Mode<br /> </li><li class="mv5"> ±2% Accuracy Current for Wide Current Range<br /> </li><li class="mv5"> LED Current Rising and Falling Slop Control<br /> </li><li class="mv5"> Fault Detection for LED Open/Short<br /> </li><li class="mv5"> Under-Voltage Lockout and Thermal Shutdown<br /> </li><li class="mv5"> Integrated Dynamic Headroom Control (DHC)<br /> </li><li class="mv5"> Support 1D/2D/3D Dimming (Programmable Channel Delay, Individual PWM Duty Control, Automatic VSYNC Synchronization)<br /> </li><li class="mv5"> 25MHz Max SPI Interface with Daisy chain<br /> </li><li class="mv5"> Flexible Daisy-Chained SPI Interface<br /> </li><li class="mv5"> RoHS Compliant and Halogen Free</li>
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<li class="mv5"> LCD TV, MNT Display Backlight<br /> </li><li class="mv5"> General Purpose Constant Current Source<br /> </li><li class="mv5"> Architectural and Decorative LED Lighting</li>
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