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NUD4700
LED Shunt
The NUD4700 is an electronic shunt which provides a current bypass
in the case of a single LED going into open circuit. LEDs are by nature
quite fragile when subjected to transients and surge conditions. There
are also many cases where high reliability of the LED lighting must be
maintained such as headlights, lighthouses, bridges, aircraft, runways
and so forth. In these cases the low cost addition of the NUD4700 will
provide full assurance that an entire string of LEDs will not extinguish
should one LED fail. NUD4700 is also applicable to other loads where
circuit continuity is required. This device is designed to be used with
1 W LEDs (nominally 350 mA @ 3 V).
Features
? A Simple Two Terminal Device
? Automatically Resets Itself if the LED Heals Itself or is Replaced
? ON ? State Voltage Typically 1 V
? OFF ? State Current less than 250 m A
? This is a Pb ? Free Device
http://onsemi.com
Anode
Control
Circuit
Cathode
Typical Applications
? LEDs where Preventive Maintenance is Non Practical
? LED Headlights
? LEDs with High Reliability Requirements
? Crowbar Protection for Open Circuit Conditions
? Overvoltage Protection for Sensitive Circuits
Anode
Cathode
POWERMITE [
CASE 457
PLASTIC
MARKING DIAGRAM
Anode
M
MNH G
Cathode
M = Date Code
MNH = Device Code
G
= Pb ? Free Package
PIN FUNCTION DESCRIPTION
Pin
Anode
Cathode
Description
Positive Input Voltage to the Device
Negative Input Voltage to the Device
ORDERING INFORMATION
Device
Package
Shipping ?
NUD4700SNT1G POWERMITE 3000/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 Specifications
Brochure, BRD8011/D.
? Semiconductor Components Industries, LLC, 2010
March, 2010 ? Rev. 8
1
Publication Order Number:
NUD4700/D
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