LT3591

• 产品介绍

LT3591采用3mm x 2mm DFN封装的白光LED驱动器，集成肖特基

特点

• Drives Up to Ten White LEDs from a 3V Supply 从3V电源驱动多达10个白光LED
• High Side Sense Allows “One Wire Current Source” 高压侧检测允许“一个单线电流源”
• Internal Schottky Diode 内部肖特基二极管
• One Pin Dimming and Shutdown一个引脚亮度和关机
• 80:1 True Color PWMTM Dimming Range 80:1真彩色PWMTM调光范围
• 42V Open LED Protection 42V开放式的LED保护
• 1MHz Switching Frequency 1MHz的开关频率
• ±5% Reference Accuracy参考精度±5％
• VIN Range: 2.5V to 12V VIN范围：2.5V至12V
• Requires Only 2.2µF Output Capacitor只需要2.2μF输出电容
• Low Profile 8-Lead DFN Package 8引脚薄型DFN封装
• (3mm × 2mm × 0.75mm) （3毫米×2mm的×0.75毫米）
• 描述 The LT3591 is a fixed frequency step-up DC/DC converter specifi cally designed to drive up to ten white LEDs in series from a Li-Ion cell.该器件是一个固定频率升压型DC / DC转换器的具体美云哄抬到10个白色LED串联，从锂离子电池。 Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors.系列LED的连接提供相同的LED电流，产生均匀的亮度，省去了镇流电阻器的需要。 The device features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler one wire LED connection.该设备具有独特的高侧LED电流检测，可以作为一个功能的一部分“一个单线电流源”的LED串的一侧可以返回到地面的任何地方，让一个简单的一条线LED连接。 Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.传统的LED驱动器使用一个接地电阻的LED电流检测，需要2线连接到LED串。 The high switching frequency allows the use of tiny inductors and capacitors.高开关频率允许使用小的电感器和电容器。 A single pin performs both shutdown and accurate LED dimming control.一个引脚执行关机和精确的LED调光控制。 Few external components are needed: open-LED protection and the Schottky diode are all contained inside a low profi le 3mm × 2mm DFN package.需要很少的外部元件：所有低利润勒采用3mm×2mm DFN封装包内所载的LED开路保护和肖特基二极管。 应用 Tape and Reel: Add #TR磁带和卷轴：添 加＃TR Lead Free: Add #PBF无铅：添 加＃TRPBF Lead Free Tape and Reel: Add #TRPBF无铅磁带和卷轴：添 加＃PBF