NUD4011 Datasheet | onsemi

Features - Supplies Constant LED Current for Varying Input Voltages - External Resistor Allows Designer to Set Current - up to 70 m A - 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 ponent 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 Vin Positive input voltage to the device Boost This pin may be used to drive an external transistor as described in the App Note AND8198/D. Rext An external resistor between Rext and Vin pins sets different current levels for different application needs PWM For high voltage applications (higher than 48 V), pin 4 is connected to the LEDs array. For low voltage applications (lower than 48 V), pin 4 is connected to ground. 5, 6, 7, 8 Iout The LEDs are connected from these pins to ground DATA SHEET .onsemi. 8 1 SO- 8 CASE 751 MARKING DIAGRAM 4011 AYWWG G 1 = Assembly...