NUD4011
Low Current LED Driver
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).
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 70 mA
• Offered in Surface Mount Package Technology (SO−8)
• Pb−Free Package is Available
1
8
7
6
5
V
I
I
in
out
out
2
3
4
Boost
Benefits
Current
Set Point
R
ext
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
PWM
I
out
Typical Applications
• Portables: For Battery Back−up Applications, also Simple Ni−CAD
Battery Charging
• Industrial: General Lighting Applications and Small Appliances
MARKING
DIAGRAM
8
1
4011
AYWWG
G
• Automotive: Tail Lights, Directional Lights, Back−up Light,
SO−8
CASE 751
8
Dome Light
1
PIN FUNCTION DESCRIPTION
A
Y
WW
= Assembly Location
= Year
= Work Week
Pin
1
Symbol
Description
V
in
Positive input voltage to the device
G
= Pb−Free Package
(Note: Microdot may be in either location)
2
Boost
This pin may be used to drive an external transistor
as described in the App Note AND8198/D.
3
4
R
An external resistor between R and V pins sets
ext in
ext
ORDERING INFORMATION
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.
Device
Package
Shipping
NUD4011DR2
NUD4011DR2G
SO−8
2500 / Tape & Reel
2500 / Tape & Reel
SO−8
(Pb−Free)
5, 6, 7, 8
I
The LEDs are connected from these pins to ground
out
†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. 3
NUD4011/D