DESCRIPTION
The LT®3476 is a quad output DC/DC converter designed to operate as a constant-current source for driving high current LEDs. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. A frequency adjust pin allows the user to program switching frequency between 200kHz and 2MHz to optimize efficiency and external component size.

FEATUREs
■ True Color PWMTM Dimming Delivers Up to 5000:1 Dimming Ratio (In Boost Configuration)
■ LED Current Regulation with High-Side Sense
■ VADJ Pin Accurately Sets LED Current Sense Threshold Over Range 10mV to 120mV
■ Four Independent Driver Channels with 1.5A, 36V Internal NPN Switches
■ Frequency Adjust Pin: 200kHz to 2MHz
■ High Efficiency Conversion = Up to 96%
■ Open LED Protection
■ Low Shutdown Current < 10µA
■ Wide VIN Range: 2.8V to 16V
■ Thermally Enhanced, 38-Lead, 5mm × 7mm QFN Package

APPLICATIONS
■ RGGB Lighting
■ Automotive and Avionic Lighting
■ TFT LCD Backlighting
■ Constant-Current Sources