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有源点阵液晶显示器(AMLCD)电源

低噪声集成方案,为有源矩阵TFT LCD显示器供电

产品详情

主要特征

简化框图

Technical Docs

数据资料 有源点阵液晶显示器(AMLCD)电源 Apr 01, 1998

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主要特征

  • Integrates All Active Circuitry for Three DC-DC Converters
  • Ultra-Small External Components (ceramic capacitors, 2µH to 5µH inductors)
  • DC-DC Converters Phase-Locked to Backplane Frequency for Lowest Noise
  • Low Operating Voltage (down to +2.8V)
  • Adjustable Output Voltage from VIN to +5.5V
  • Load Currents Up to 500mA
  • Adjustable TFT Gate Driver Output:
    • Positive, VIN to +28V
    • Negative, 0 to -10V (-20V with added components)
  • Includes 0.35Ω Backplane Driver
  • 1µA Shutdown Current
  • Power-Ready Output Signal

应用/用途

  • LCD模块
  • LCD面板表

描述

The MAX1664 integrates power-supply and backplane drive circuitry for active-matrix thin-film-transistor (TFT) liquid crystal displays. Included are a single-output, pulse-width-modulation boost converter (0.25Ω switch), a dual-output (positive and negative) gate-driver supply using one inductor, an LCD backplane driver, and a simple phase-locked loop to synchronize all three outputs.

High switching frequency (1MHz nominal) and phase-locked operation allow the use of small, minimum-height external components while maintaining low output noise. A +2.8V to +5.5V input voltage range allows operation with any logic supply. Output voltages are adjustable to +5.5V (DC-DC 1) and to +28V and-10V (DC-DC 2). The negative output voltage can be adjusted to -20V with additional components. Also included are a logic-level shutdown and a "Ready" output (RDY) that signals when all three outputs are in regulation.

The boost-converter operating frequency can be set at 16, 24, or 32 times the backplane clock. This flexibility allows a high DC-DC converter frequency to be used with LCD backplane clock rates ranging from 20kHz to 72kHz. The MAX1664 is supplied in a 1.1mm-high TSSOP package.

简化框图

MAX1664:典型工作电路 MAX1664:典型工作电路 Zoom icon

Technical Docs

数据资料 有源点阵液晶显示器(AMLCD)电源 Apr 01, 1998

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心