LT3465

LT34651.2MHz/2.4MHz白光LED升压型转换器内置肖特基在采用ThinSOT

特点

• Inherently Matched LED Current 固有匹配的LED电流
• Drives Up to Six LEDs from a 3.6V Supply 从一个3.6V电源驱动多达六个LED
• No External Schottky Diode Required 无需外部肖特基二极管
• 1.2MHz Switching Frequency (LT3465) 1.2MHz的开关频率（LT3465）
• 2.4MHz Switching Frequency Above AM Broadcast Band (LT3465A) 2.4MHz的开关频率高于AM广播波段（LT3465A）
• Automatic Soft-Start (LT3465)自动软启动（LT3465）
• Open LED Protection LED开路保护
• High Efficiency: 81% (LT3465) 79% (LT3465A) Typical高效率：81％（LT3465）79％（LT3465A）的典型
• Requires Only 0.22µF Output Capacitor只需要0.22μF的输出电容
• Low Profile (1mm) SOT-23 Packaging低调（1毫米）SOT-23封装
• 描述

  The LT ^® 3465/LT3465A are step-up DC/DC converters designed to drive up to six LEDs in series from a Li-Ion cell. ^{LT®3465/LT3465A}升压型DC / DC转换器设计，从锂离子电池驱动多达6个串联LED。 Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors.系列LED的连接提供相同的LED电流，无需镇流电阻器的需要。 These devices integrate the Schottky diode required externally on competing devices.这些器件集成了同类器件的外部肖特基二极管的需要。 Additional features include output voltage limiting when LEDs are disconnected, onepin shutdown and dimming control.附加功能包括输出电压限制LED断接时，onepin关闭和调光控制。 The LT3465 has internal soft-start. LT3465具有内部软启动。

  The LT3465 switches at 1.2MHz, allowing the use of tiny external components. LT3465开关频率为1.2MHz，允许使用纤小的外部元件。 The faster LT3465A switches at 2.4MHz.更快LT3465A在2.4MHz的转换。 Constant frequency switching results in low input noise and a small output capacitor.恒定频率开关在低输入噪声和输出电容小的结果。 Just 0.22µF is required for 3-, 4- or 5-LED applications. 0.22μF只需要3 - ，4 - 或5-LED应用。

  The LT3465 and LT3465A are available in low profile (1mm) 6-lead SOT-23 (ThinSOT™) packages. LT3465和LT3465A可用低调（1mm）的6引脚SOT-23（采用ThinSOT™）封装。

• 应用

  • Cellular Phones手机
  • PDAs, Handheld Computers掌上电脑，手持电脑
  • Digital Cameras数码相机
  • MP3 Players MP3播放器
  • GPS Receivers GPS接收机