The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series from a 48V DC source. Series connection of the LEDs provides identical LED currents of up to 50mA, resulting in uniform brightness and eliminating the need for ballast resistors. A fixed frequency, current mode architecture results in stable operation over a wide range of input voltage and output voltage. The high switching frequency of 850kHz permits the use of tiny, low profile inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. The power switch, Schottky diode and control circuitry are all contained inside a space saving SC70 package or 2mm × 2mm DFN package to allow a small converter footprint and lower parts cost. Applications * LED Fixed Signage * Traffic Signs * Neon Sign Replacement * 4.5V to 55V Input Voltage Range * Up to 50mA LED Current * 80mA, 55V Switch * Internal Schottky Diode * 15µA Supply Current in Shutdown * 500µA Supply Current Operating, Not Switching * Switching Frequency: 850kHz * 200mV Feedback Voltage with ±5% Accuracy * CTRL Input Performs Dimming and Shutdown * 91% Efficiency (10 LEDs, 50mA) * Requires Only 1µF Output Capacitor * 8-Lead SC70 Package * 6-Lead 2mm × 2mm DFN Package https://elecena.pl/product/513811/48v-buck-mode-led-driver-in-sc70-and-2mm-2mm-dfn 2007-08-22 https://elecena.pl/product/513811/48v-buck-mode-led-driver-in-sc70-and-2mm-2mm-dfn 2014-06-11 https://elecena.pl/product/513811/48v-buck-mode-led-driver-in-sc70-and-2mm-2mm-dfn 2025-01-22