Description

The LT3590ESC8#PBF 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.

Specifications and features

■ 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

Application Scenarios

■ LED Fixed Signage
■ Traffic Signs
■ Neon Sign Replacement

Comparison

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