LM3590 - National Semiconductor

LM3590 Series White LED Driver

The LM3590 is a White LED constant current driver capable of supplying up to 3 White LEDs connected in series with 20mA. This device operates over a wide 6V-12.6V input voltage range. The output can accomodate LEDs with a combined forward voltage of up to 11.5V, from a 12V input supply. The LED drive current is programmed by using an external resistor on the.

Features

n Drives up to 3 stacked white LEDs n 6.0V-12.6V input voltage range n Up to 20mA LED output current n Excellent LED current matching guaranteed by series configuration n Single connection to the White LEDs in the display module n Tightly controlled programmable current source n Low shutdown current (0.1µA typ.) n PWM brightness control n Very small solution size n SOT23-5 package: 3mm x 3mm x 1.0mm (LxWxH) Applications n White LED Display Backlights n Keypad Backlights n General purpose constant current driver for high forward-voltage LEDs Typical Application Circuit 20081301 © 2003 Nationa.