NUD4011

Low Current LED Driver NUD4011 This device is designed to replace discrete solutions for driving LEDs in AC/DC high voltage applications (up to 200 V). An external resistor allows the circuit designer to set the drive current for different LED arrays. This discrete integration technology eliminates individual components by combining them into a single package, which results in a significant reduction of both system cost and board space. The device is a small surface mount package (SO−8). Features Supplies Constant LED Current for Varying Input Voltages External Resistor Allows Designer to Set Current – up to 70 mA Offered in Surface Mount Package Technology (SO−8) This is a Pb−Free Device Benefits Maintains a Constant Light Output During Battery Drain One Device can be used for Many Different LED Products Reduces Board Space and Component Count Simplifies Circuit and System Designs Typical Applications Portables: For Battery Back−up Applications, also Simple Ni−CAD Battery Charging Industrial: General Lighting Applications and Small Appliances Automotive: Tail Lights, Directional Lights, Back−up Light, Dome Light PIN FUNCTION DESCRIPTION Pin Symbol Description 1 Vin Positive input voltage to the device 2 Boost This pin may be used to drive an external transistor as described in the App Note AND8198/D. 3 Rext An external resistor between Rext and Vin pins sets different current levels for different application needs 4 PWM For high voltage ap...