LT3591 - LT3591是White LED Driver with Integrated Schottky in 3mm x 2mm DFN

LT3591是LINEAR凌力尔特公司的一款升压型 LED 驱动器产品，LT3591是LT3591是White LED Driver with Integrated Schottky in 3mm x 2mm DFN，本站介绍了LT3591的封装应用图解、特点和优点、功能等，并给出了与LT3591相关的LINEAR元器件型号供参考。

LT3591 - LT3591是White LED Driver with Integrated Schottky in 3mm x 2mm DFN - 升压型 LED 驱动器 - 电源管理 - 凌力尔特

LT3591 - White LED Driver with Integrated Schottky in 3mm x 2mm DFN

LT3591 - White LED Driver with Integrated Schottky in 3mm x 2mm DFN - Linear Technology（凌力尔特）

功能描述

The LT3591 is a fixed frequency step-up DC/DC converter speci? cally designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. 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. Traditional LED drivers use a grounded resistor to sense LED current, requiring a 2-wire connection to the LED string.

The high switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. Few external components are needed: open-LED protection and the Schottky diode are all contained inside a low pro? le 3mm × 2mm DFN package.

特点

Drives Up to Ten White LEDs from a 3V Supply

High Side Sense Allows “One Wire Current Source”

Internal Schottky Diode

One Pin Dimming and Shutdown

80:1 True Color PWMTM Dimming Range

42V Open LED Protection

1MHz Switching Frequency

±5% Reference Accuracy

VIN Range: 2.5V to 12V

Requires Only 2.2µF Output Capacitor

Low Profile 8-Lead DFN Package