LT3591

• Product Introduction

The LT3591 is a white LED driver in a 3mm x 2mm DFN package with integrated Schottky

peculiarity

• Drives Up to Ten White LEDs from a 3V Supply Drive up to 10 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 42V Open LED Protection
• 1MHz Switching Frequency 1MHz switching frequency
• ±5% Reference Accuracy±5%
• VIN Range: 2.5V to 12V VIN Range: 2.5V to 12V
• Requires Only 2.2μF Output Capacitor
• Low Profile 8-Lead DFN Package 8-pin low-profile DFN package
• (3mm × 2mm × 0.75mm) (3mm×2mm ×0.75mm)
• description 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. 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 profi le 3mm × 2mm DFN package×. apply Tape and Reel: Add #TR磁带和卷轴: Add #TR Lead Free: Add #PBF无铅: Add #TRPBF Lead Free Tape and Reel: Add #TRPBF无铅磁带和卷轴: Add #PBF