NUD4011 Datasheet, PDF (1/9 Pages) ON Semiconductor – Low Current LED Driver

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).
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
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
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
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 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
PWM 4
Current
Set Point
8 I_out
7 I_out
6 I_out
5 Iout
8
1
SO−8
CASE 751
MARKING
DIAGRAM
8
4011
AYWWG
G
1
A
= Assembly Location
Y
= Year
WW = Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
NUD4011DR2
NUD4011DR2G
Package
Shipping^†
SO−8 2500 / Tape & Reel
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. 3
Publication Order Number:
NUD4011/D