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LTC3217
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LTC3217

  • 所属类别：LED驱动
  • 产品名称：600mA 低噪声多 LED 相机照明灯充电泵
  • 厂商：LT
  • 生产批号：11+
  • 封装：QFN
  • 库存状态：有库存
  • 库存量：5000
  • 最低订购量：1
  • 详细资料：点击查找LTC3217的pdf资料
  • 点击询价
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  • Product Introduction

LTC3217

600mA Low Noise Multi LED Camera Lighting Charging Pump

peculiarity

  • 充电泵提供了高效率和自动模式切换
  • 多模式运作：1x、1.5x、2x
  • 4 个低压降 LED 输出
  • 高达 600mA 的总输出电流
  • 独立的电筒和闪光灯 ISET 及使能引脚
  • 低噪声恒定频率操作
  • 通过 EN2 引脚来进行 PWM 亮度控制
  • 低停机电流：4µA
  • 内部软起动功能限制了启动和模式切换期间的浪涌电流
  • 开路/短路 LED 保护
  • 无电感器
  • (3mm x 3mm) 16 引脚 QFN 塑料封装
  •  

description

The LTC®3217 is a low-noise charge pump DC/DC converter designed to power 4 high-current LEDs. LTC3217 requires only 4 small ceramic capacitors and two current-setting resistors to form a complete LED power supply and current controller.

内部软起动电路可防止在启动和模式变更期间产生过大的waveChung电流。高开关频率允许采用小的外部电容器。独立的高电流和低电流设定值由两个外部电阻器来设置。停机模式和电流输出电平通过两个逻辑输入来选择。

The current flowing through the LEDs is set through the ISET1 and ISET2 pins. In addition, the brightness can be controlled by pulse width modulation of the EN2 pin.

The charging pump optimizes efficiency based on the voltage across the LED current source. The device is powered on in 1x mode and automatically switches to boost mode when either enabled LED current source begins to enter a voltage drop state. The first voltage drop will convert the device to 1.5x mode, and the subsequent voltage drop will switch the device to 2x mode. When the device is shut down, LTC3217 resets to 1x mode.

LTC3217 is available in a flat 16-pin (3mm x 3mm x 0.75mm) QFN package.

apply

  • 用于蜂窝电话/DSC/PDA 的多 LED 相机照明灯电源

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