LT3003

LT3003三通道LED Ballaster与PWM

特点

• 3% LED Current Matching 3％的LED电流匹配
• Up to 350mA Continuous Current per LED String 高达350mA的连续电流每个LED串
• Up to 3000:1 True Color PWMTM Dimming Range 高达3000:1的True Color PWMTM调光范围
• PWM Input Disconnects LED Strings PWM输入断开LED串
• Can Operate in Buck, Boost and Buck-Boost Modes可以工作在降压，升压和降压 - 升压模式
• Wide Input Range: 3V to 40V宽输入电压范围：3V至40V
• Overtemperature Outputs过热输出
• Works with LT1618, LT3477, LT3474, LT3475, LT3476, LTC3783 LT1618，LT3477，LT3474，LT3475，LT3476，LTC3783的兼容
• Thermally Enhanced 10-Pin MSOP Package耐热增强型10引脚MSOP封装
• 描述 The LT3003 drives three separate strings of LEDs up to 350mA/channel with 3% accurate current matching, resulting in uniform LED brightness and intensity. LT3003驱动3个独立的LED串350mA/channel 3％的电流匹配准确，一致的LED亮度和强度。 This approach is superior to conventional methods of running three separate channels with external ballast resistors requiring expensive factory calibration.这种方法优于传统方法需要昂贵的工厂校准与外部镇流器电阻运行三个独立的通道。

  The LT3003 operates in boost mode, “buck mode” and “buck-boost mode”. LT3003在升压模式运作，“降压模式”和“降压 - 升压模式”。 A True Color PWM Dimming ratio of up to 3000:1 is achievable using a logic-level signal at the PWM pin for all modes without the need for external level-shifting circuitry.在所有模式下的PWM引脚的逻辑电平信号，而不需要外部电平转换电路，是可以实现的一个真彩色PWM调光比高达3000:1。 For applications with input supply above and below the output voltage of the LED strings, the LT3003 allows the LEDs to be returned to the input supply (“buck-boost mode”) instead of being limited to only SEPIC solutions.为高于和低于LED串输出电压与输入电源的应用，LT3003允许LED要返回到输入电源（降压 - 升压模式“），而不是只限于SEPIC解决方案。

  The LT3003 is ideal for high power LED driver applications such as TFT LCD backlighting and heads-up displays. LT3003是理想的高功率LED驱动器应用，如TFT LCD背光和抬头显示器。 Additional overtemperature outputs allow appropriate system management for increased reliability.额外的过热输出允许适当的系统管理，提高了可靠性。

  The LT3003 is available in a small 10-pin MSE package. LT3003是一个小型的10针的MSE包。

  应用

  • High Power LED Ballaster大功率指示灯Ballaster的
  • Automotive Lighting汽车照明
  • Video Cameras摄像机
  • TFT LCD Backlighting TFT液晶显示屏背光源