NUD4001 Datasheet, PDF (1/8 Pages) ON Semiconductor – High Current LED Driver

NUD4001
High Current LED Driver
This device is designed to replace discrete solutions for driving
LEDs in low voltage AC−DC applications 5.0 V, 12 V or 24 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 500 mA
• Offered in Surface Mount Package Technology (SO−8)
• Pb−Free Package is Available
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: Low Voltage Lighting Applications and Small Appliances
• Automotive: Tail Lights, Directional Lights, Back−up Light,
Dome Light
PIN FUNCTION DESCRIPTION
Pin Symbol
Description
1
V_in 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
R_ext An external resistor between R_ext and V_in pins sets
different current levels for different application needs
4
GND Ground
5, 6, 7, 8 I_out The LEDs are connected from these pins to ground
http://onsemi.com
PIN CONFIGURATION
AND SCHEMATIC
V_in 1
Boost 2
R_ext 3
GND 4
Current
Set Point
8 I_out
7 I_out
6 I_out
5 I_out
8
1
SO−8
CASE 751
STYLE 25
MARKING
DIAGRAM
8
4001
AYWW
G
1
4001 = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Device
ORDERING INFORMATION
Device
Package
Shipping^†
NUD4001DR2
SO−8 2500 / Tape & Reel
NUD4001DR2G SO−8 2500 / Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
1
June, 2006 − Rev. 6
Publication Order Number:
NUD4001/D