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Спецификация NUD4011 изготовлена «ON Semiconductor» и имеет функцию, называемую «Low Current LED Driver». |
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Детали детали
Номер произв | NUD4011 |
Описание | Low Current LED Driver |
Производители | ON Semiconductor |
логотип |
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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 Vin 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 Rext An external resistor between Rext and Vin 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 Iout The LEDs are connected from these pins to ground
http://onsemi.com
PIN CONFIGURATION
AND SCHEMATIC
Vin 1
Boost 2
Rext 3
PWM 4
Current
Set Point
8 Iout
7 Iout
6 Iout
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
June, 2006 − Rev. 3
1
Publication Order Number:
NUD4011/D
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NUD4011
MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
Rating
Symbol
Value
Unit
Input Voltage
Vin 200 V
Output Current
(For Vdrop ≤ 16 V) (Note 1)
Iout 70 mA
Output Voltage
Vout 198 V
Human Body Model (HBM)
ESD
500 V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Vdrop = Vin – 0.7 V − VLEDs.
THERMAL CHARACTERISTICS
Characteristic
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Total Power Dissipation (Note 2)
Derating above 25°C (Figure 3)
Thermal Resistance, Junction–to–Ambient (Note 2)
Thermal Resistance, Junction–to–Lead (Note 2)
2. Mounted on FR−4 board, 2 in sq pad, 1 oz coverage.
Symbol
TA
TJ
TSTG
PD
RqJA
RqJL
Value
−40 to +125
150
−55 to +150
1.13
9.0
110
77
Unit
°C
°C
°C
W
mW/°C
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Characteristic
Output Current1 (Note 3)
(Vin = 120 Vdc, Rext = 24 W, VLEDs = 90 V)
Output Current2 (Note 3)
(Vin = 200 Vdc, Rext = 68 W, VLEDs = 120 V)
Bias Current
(Vin = 120 Vdc, Rext = Open, Rshunt = 80 kW)
Voltage Overhead (Note 4)
3. Device’s pin 4 connected to the LEDs array (as shown in Figure 5).
4. Vover = Vin – VLEDs.
Symbol
Iout1
Iout2
IBias
Vover
Min Typ Max Unit
26.0 27.5 29.5
mA
11.5 14.0 15.5 mA
− 1.1 2.0 mA
5.0 − − V
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NUD4011
1000
100
10
1
1
TYPICAL PERFORMANCE CURVES
(TA = 25°C unless otherwise noted)
10 100
IOUT (mA)
Figure 1. Output Current (IOUT)
vs. External Resistor (Rext)
1000
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
−40 −25 −10 5 20 35 50 65 80 95 110 125 140 155
TJ, JUNCTION TEMPERATURE (°C)
Figure 2. Vsense vs. Junction Temperature
1.200
1.000
0.800
0.600
0.400
0.200
0.000
25 35 45 55 65 75 85 95 105 115 125
TA, AMBIENT TEMPERATURE (°C)
Figure 3. Total Power Dissipation (PD)
vs. Ambient Temperature (TA)
1.2
1.0
0.8
0.6
0.4
0.2
0.0
−40 −25 −10 5 20 35 50 65 80 95 110 125 140 155
TJ, JUNCTION TEMPERATURE (°C)
Figure 4. Current Regulation vs. Junction
Temperature
http://onsemi.com
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Номер в каталоге | Описание | Производители |
NUD4011 | Low Current LED Driver | ON Semiconductor |
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