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数控CCFL背光灯电源

SMBus™控制的CCFL电源,提供明亮的无闪烁工作,提供有效的灯管保护

产品详情

主要特征

简化框图

Technical Docs

数据资料 数控CCFL背光灯电源 Sep 01, 1996

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主要特征

  • Direct Digital Control of CCFL Brightness
  • Low Supply Current:
    • 3mA Max Operating
    • 20µA Max Shutdown
  • Low-Voltage Operation, Down to 4.5V
  • Internal 26V, 0.7Ω Power Switch
  • Protection Against Open or Shorted Lamps
  • Supports Isolated Transformer Secondary Winding
  • SMBus Serial Interface (MAX1611)
  • No Flicker at Low Brightness (internal 280Hz current chopping)
  • High Power-to-Light Efficiency
  • Selectable 290kHz/145kHz Switching Frequency
  • Oscillator SYNC Input
  • 16-Pin Narrow SO Package

应用/用途

  • 仪表显示器
  • 笔记本电脑
  • 销售终端机(POS)
  • 便携式医疗设备

描述

The MAX1610/MAX1611 are fully integrated, high-efficiency drivers for cold-cathode fluorescent lamps (CCFLs). They operate from a 4.5V to 26V power source. An on-board, high-switching-frequency power MOSFET reduces external component count and magnetics size. The MAX1610/MAX1611 protect against open or shorted lamps. The CCFL can be driven from an isolated transformer secondary winding to improve efficiency and avoid flicker at dim tube settings. Brightness is adjusted by scaling the lamp current, or by operating with a fixed lamp current and chopping the CCFL on and off at a rate faster than the eye can detect.

The MAX1610's digital inputs increment, decrement, or clear an internal, 5-bit up/down counter, which sets CCFL brightness. The MAX1611 uses a System Management Bus (SMBus) 2-wire serial interface to directly set CCFL brightness. Both devices include micropower shutdown and a linear regulator that eliminates the need for a separate logic supply. The digital interface remains active in shutdown, preserving the brightness setting.

简化框图

MAX1610、MAX1611:引脚配置 MAX1610、MAX1611:引脚配置 Zoom icon

Technical Docs

数据资料 数控CCFL背光灯电源 Sep 01, 1996

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