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AS3812型

AS3812型LED Driver

Highly Accurate 16-Channel Integrated Current Sinks for LED Backlighting in 4K Ultra HD and HDR LCD Display Applications

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Individual and Global Dimming Capable for Uniform Brightness Control

AS3812 LCD背光LED驱动器集成了16个高精度电流接收器和数字控制技术，以改善4K和HDR LCD显示器的亮度控制。绝对电流精度优于+/-1%，结合高分辨率调光控制，可实现整个面板的最高亮度均匀性。

The AS3812 offers 12-bit individual dimming control. This feature reduces power consumption and increases contrast ratio through optimized local dimming. A single, 10-bit global dimming control also provides uniform brightness control over the full panel.

Enhanced DC/DC feedback control for up to two external DC/DC converters controlled by an SPI bus and a full array of protection features makes the AS3812 flexible and fully protected for any LCD display system.

Features

  • 16-channel LED driver with internal current sink MOSFET
  • 集成电流设置电阻器，降低成本
  • 每个通道的最大输出电压为30V
  • Highly accurate absolute current accuracy of ±1%
  • 每个输出单独12位PWM和一个10位全局模拟调光控制
    • Improves contrast ratio and saves power via local dimming
  • Comprehensive protection features:
    • Individual LED short protection
    • 外部复位输入-保持输出关闭，直到系统准备就绪
    • Register Lock/Unlock
    • LED开路故障检测
    • 超温保护

Features

  • SPI菊花链接口简化了设计时，支持超过16个LED字符串
  • 3 SPI communication protection modes in one LED driver
  • Internal PLL ensures jitter-free operation even with noisy VSYNC signal

雷竞技安卓下载

  • LCD Backlighting for Ultra HD/4K HDR TVs
  • HDR Notebooks/Monitor Displays

方块图

功能框图
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Typical Applications Diagram

资源

Product Briefs and Summaries
日期 Version
AS3812型Product Summary 19/12/2019 版次。1.01

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