IW7027.

IW7027.

16-Channel, External Current Sinks LED Driver with Patented 2-pin Sensing to Protect Against LED Shorts

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16通道,外部电流槽LED驱动器

IW7027是一个16通道LED背光驱动器,可增强电视图像质量,并降低2D和3D LCD电视的BOM成本。它使用外部LED电流接收器和最多两个外部DC / DC转换器(升压,降压,LLC等),以实现易于电流和电压缩放。通过整合对话的专利BroadLED™technology, enabling a unique 2-pin LED open/short sensing technology to protect the external current sinks, the iW7027 eliminates the need for high voltage sensing components and reduces the required pin count resulting in a smaller, lower-cost package. The BroadLED technology also enables the use of loosely binned LED arrays, further reducing the total BOM cost.

Dialog’s patentedAnyMode™调光提供全面,简单,灵活的选择,可提高LED电视图像质量。它允许以相同或更高频率完全同步到视频帧的连续PWM信号或突发PWM信号。PWM占空比可以在每个视频帧中更新,并具有用户可配置的尾部或头延迟。这提供了更多选择减少运动模糊并提高对比度。即使使用嘈杂的VSYNC信号,也可以确保无抖动操作的内置PLL(锁相环)。

特征

  • 16通道LED驱动器控制器,每个通道无限LED电压
  • Patented BroadLED™ adaptive switch mode technology for high current matching at maximum efficiency
    • Enables patented 2-pin external LED open/short protection circuit
    • 允许使用更便宜,松散的LED阵列,以降低BOM成本
  • TQFP-44包 - 减少针计数和成本
  • Flexible input supply voltage rating: 5V/9V-16V
  • AnyMode™ comprehensive dimming control improves picture quality
    • 高频PWM调光高达4kHz
    • Scanning-mode PWM dimming
    • Configurable phase-shift dimming
    • 8位模拟调光
    • 12位PWM调光
    • Hybrid dimming (analog and PWM)
  • PWM dimming range: 0% to 99.9%
  • Scalable LED current
  • Supports 2D and 3D LCD TV modes
  • 支持图案延迟器(PR)和快门玻璃(SG)3D技术

特征

  • 全面保护功能:
    • 个人LED短路保护
    • 通道到通道短路保护
    • Current sink MOSFET drain-to-source short protection
    • Current sense resistor short protection
    • Microcontroller interrupt interface
    • LED open-fault detection
    • Over-temperature protection
  • Digitally controlled scanning mode
  • External LED current sink MOSFETs for maximum flexibility
  • SPI daisy-chain interface simplifies design when supporting more than 16 LED strings
  • 即使使用嘈杂的VSYNC信号,内部PLL也可以确保无抖动操作
  • Reduces BOM costs
    • 数字控制引擎消除了MCU的需求
    • 2-pin sensing removes need for external high voltage sensing components
    • 5V/9V-16V input supply voltage eliminates need for separate voltage rail

亚博国际官网平台网址

  • Direct and Edge-Lit LED TVs

Block Diagrams

典型的应用程序图亚博国际官网平台网址
Functional block diagram

Resources

产品简介和摘要
Date 版本
IW7027.Product Summary 30/03/2020 Rev. 1.0.

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