LT3491ESC8#PBF - 

Led Driver, 1 Output, Boost (Step Up), 2.5V-12V in, 2.3MHz switch, SC-70-8

LT3491ESC8#PBF - Led Driver, 1 Output, Boost (Step Up), 2.5V-12V in, 2.3MHz switch, SC-70-8

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Product Information

Boost (Step Up)
MSL 1 - Unlimited
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Product Overview

The LT3491ESC8#PBF 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 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 2.3MHz switching frequency allows the use of tiny inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control.
  • Internal Schottky diode
  • One pin dimming and shutdown
  • ±5% Reference accuracy
  • Requires only 1µF output capacitor
  • High-side sense allows 'one wire current source'


Consumer Electronics, Computers & Computer Peripherals, Portable Devices, Audio

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