NUD4700 D

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).
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Anode
Control
Circuit
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 mA
Available with White Package
This is a Pb−Free Device
Cathode
Anode
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
POWERMITE[
CASE 457
MARKING DIAGRAM
M
MNHG
Anode
Cathode
M
= Date Code
MNH = Device Code
G
= Pb−Free Package
PIN FUNCTION DESCRIPTION
Pin
Description
Anode
Positive Input Voltage to the Device
Cathode
Negative Input Voltage to the Device
ORDERING INFORMATION
Device
Package
Shipping†
NUD4700SNT1G
POWERMITE
(Black)
3000/Tape &
Reel
NUD4700WSNT1G POWERMITE
(White)
3000/Tape &
Reel
†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, 2016
May, 2016 − Rev. 9
1
Publication Order Number:
NUD4700/D
NUD4700
MAXIMUM RATINGS (Maximum ratings are those, that, if exceeded, may cause damage to the device. Electrical Characteristics are
not guaranteed over this range)
Rating
Symbol
Value
Unit
VDM
−0.3 to 10
V
Peak Repetitive Off State Voltage (Anode to Cathode)
Average On−State Current, (TA = 25°C),
(Note 1)
(Note 2)
IT(AVG)
A
1.3
0.376
Thermal Resistance, Junction−to−Air
(Note 1)
(Note 2)
°C/W
QJA
Thermal Resistance, Junction−to−Lead
80
277
°C/W
35
QJL
Power Dissipation (TA = 25°C)
(Note 1)
(Note 2)
PMAX
W
Operating Temperature Range
TJ
−40 to 150
°C
Non−Operating Temperature Range
TJ
150
°C
Lead Temperature, Soldering (10 Sec)
TL
260
°C
1.56
0.45
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Mounted onto a 1“ x 1” square copper pad.
Normally this device would be mounted on the same copper heat sink and adjacent to the LED. If the LED were to go open, then the NUD4700
shunt would now dissipate the power using the same copper heat sink. Since the NUD4700 has a voltage that is nominally 30% of the LED,
then the power dissipation would be easily handled by the same heat sink as the LED.
2. Device mounted on minimum copper pad.
ELECTRICAL CHARACTERISTICS (Unless otherwise noted: TA = 25°C)
Characteristics
Symbol
Min
Typ
Max
Unit
Off−State Current
(VAnode = 5 V)
ILEAK
−
100
250
mA
Breakdown Voltage
(IBR = 1 mA)
V(BR)
5.5
−
7.5
V
Holding Current
(VAnode = 10 V, Iinitial = 100 mA)
IH
−
6.0
12
mA
Latching Current
(VAnode = 10 V)
IL
−
35
70
mA
VT
−
−
−
1.0
1.0
1.0
1.2
−
−
V
dV/dt
250
−
−
V/ms
On−State Voltage
(IT = 0.350 A)
(IT = 0.750 A)
(IT = 1.0 A)
DYNAMIC CHARACTERISTICS
Critical Rate−of−Rise of Off State Voltage
(Vpk = Rated V(BR), TJ = 125°C, Exponential Method)
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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2
NUD4700
TYPICAL PERFORMANCE CURVES
(TA = 25°C unless otherwise noted)
6
35
IH, HOLDING CURRENT (mA)
IL, LATCHING CURRENT (mA)
40
30
25
20
15
10
5
0
−50
−25
0
25
50
75
100
125
3
2
1
−25
0
25
50
75
100
125
150
TA, AMBIENT TEMPERATURE (°C)
TA, AMBIENT TEMPERATURE (°C)
Figure 1. Latching Current vs Temperature
Figure 2. Holding Current vs Temperature
IDSS, LEAKAGE CURRENT (mA)
450
90
80
70
60
50
0
1
2
3
4
400
350
300
250
200
150
100
50
0
−50
5
25
50
75
100
125
150
TA, AMBIENT TEMPERATURE (°C)
Figure 4. Leakage Current vs Temperature
1.2
1.2
1.1
IT @ 1.0 mA
1
IT @ 350 mA
0.6
0.4
IT @ 750 mA
0.2
−25
0
25
50
75
100
125
150
1
0.9
0.8
0.7
0.6
0.5
0.25
0
−50
0
VOLTS (V)
1.4
0.8
−25
Figure 3. Capacitance vs Voltage
VT, ON−STATE VOLTAGE (V)
Cd, CAPACITANCE (pF)
4
0
−50
150
100
VT, ON−STATE VOLTAGE (V)
5
175
0.35
0.45
0.55
0.65
0.75
0.85
0.95
TEMPERATURE (°C)
IT, ON−STATE CURRNT (A)
Figure 5. On−State Voltage vs. Temperature
Figure 6. On−State Voltage vs. On−State
Current (IT) at 255C
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3
1.05
NUD4700
TYPICAL APPLICATION CIRCUIT
Q1
AC/DC
Converter
NUD4001
R1
Current
Source
NUD4700
Control
Circuit
NUD4700
Control
Circuit
NUD4700
Control
Circuit
NUD4700
Control
Circuit
NUD4700
Control
Circuit
Figure 7. Typical Application Circuit
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4
NUD4700
TYPICAL OPERATION WAVEFORMS
Switching event
LED being opened
LED Current
NUD4700 voltage
Off state
NUD4700 voltage
ON−state
NUD4700 switching
waveforms (Powermite)
Figure 8. NUD4700 Switching Waveforms
Switching event
LED being opened
Current overshoot
due to response time
of current source
LED Current
NUD4700 voltage
Off state
NUD4700 voltage
ON−state
NUD4700 switching
waveforms (zoom in)
Figure 9. Zoom in of Figure 8
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5
NUD4700
PACKAGE DIMENSIONS
POWERMITE
CASE 457−04
ISSUE F
F
0.08 (0.003)
C
−A−
J
T B
M
C
S
S
S
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH, PROTRUSIONS OR GATE BURRS. MOLD
FLASH, PROTRUSIONS OR GATE BURRS SHALL
NOT EXCEED 0.15 (0.006) PER SIDE.
DIM
A
B
C
D
F
H
J
K
L
R
S
PIN 1
−B−
K
PIN 2
R
L
J
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
1.75
2.05 0.069
0.081
1.75
2.18 0.069
0.086
0.85
1.15 0.033
0.045
0.40
0.69 0.016
0.027
0.70
1.00 0.028
0.039
-0.05
+0.10 -0.002 +0.004
0.10
0.25 0.004
0.010
3.60
3.90 0.142
0.154
0.50
0.80 0.020
0.031
1.20
1.50 0.047
0.059
0.50 REF
0.019 REF
D
H
−T−
0.08 (0.003)
M
T B
S
C
S
SOLDERING FOOTPRINT*
0.635
0.025
2.67
0.105
0.762
0.030
2.54
0.100
1.27
0.050
SCALE 10:1
mm Ǔ
ǒinches
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
POWERMITE is a registered trademark of and used under a license from Microsemi Corporation.
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are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
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coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
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NUD4700/D