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).
http://onsemi.com
PIN CONFIGURATION
AND SCHEMATIC
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
1
8
7
V
I
I
in
out
out
Boost
2
Benefits
Current
Set Point
R
3
4
6
5
I
out
• 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
ext
GND
I
out
Typical Applications
• Portables: For Battery Back−up Applications, also Simple Ni−CAD
Battery Charging
MARKING
DIAGRAM
• Industrial: Low Voltage Lighting Applications and Small Appliances
8
SO−8
CASE 751
STYLE 25
• Automotive: Tail Lights, Directional Lights, Back−up Light,
4001
AYWW
G
8
Dome Light
1
1
PIN FUNCTION DESCRIPTION
4001 = Specific Device Code
Pin
1
Symbol
Description
A
Y
= Assembly Location
= Year
V
in
Positive input voltage to the device
WW = Work Week
2
Boost
This pin may be used to drive an external transistor
as described in the App Note AND8198/D.
G
= Pb−Free Device
3
R
ext
An external resistor between R and V pins sets
ext in
different current levels for different application needs
ORDERING INFORMATION
4
GND
Ground
†
Device
Package
Shipping
5, 6, 7, 8
I
The LEDs are connected from these pins to ground
out
NUD4001DR2
NUD4001DR2G
SO−8
2500 / Tape & Reel
2500 / Tape & Reel
SO−8
(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
Publication Order Number:
June, 2006 − Rev. 6
NUD4001/D