48V Buck Mode LED Driver Powers Ten 50mA LEDs

Series connection of the LEDs provides identical LED currents up to 50mA, resulting in uniform brightness and eliminating the need of ballast resistors. Dimming is adjusted via the CTRL pin and ratios as high as 200:1 can be attained. Its switching frequency of 850kHz enables the use of tiny inductors and ceramic capacitors while providing efficiency as high as 91%. Combined with a 2mm x 2mm DFN or SC-70 package, it offers a very compact solution for driving high current LEDs.

The LT3590 utilizes a fixed frequency current mode architecture which offers stable operation over a wide range of input and output voltages. A 200mV feedback voltage offers ±5% accuracy, ensuring consistent LED brightness.

The LT3590 is available from stock in either a 2mm x 2mm DFN-6 or 8-lead SC-70 package. 1,000-piece pricing starts at $1.40 each for both versions.