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LT3491

Part Number	LT3491
Manufacturer	Linear Technology
Description	White LED Driver
Published	Jan 16, 2010
Detailed Description	LT3491 White LED Driver with Integrated Schottky in SC70 and 2mm × 2mm DFN DESCRIPTIO The LT®3491 is a fixed frequency s...
Datasheet	LT3491 PDF File

Overview

LT3491 White LED Driver with Integrated Schottky in SC70 and 2mm × 2mm DFN DESCRIPTIO The LT®3491 is a fixed frequency step-up DC/DC converter specifically designed to drive up to six 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 ...

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