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PDF NSI45020T1G Data sheet ( Hoja de datos )
| Número de pieza | NSI45020T1G | |
| Descripción | Constant Current Regulator & LED Driver | |
| Fabricantes | ON Semiconductor | |
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NSI45020T1G
Constant Current Regulator
& LED Driver
45 V, 20 mA + 15%, 460 mW Package
The linear constant current regulator (CCR) is a simple, economical
and robust device designed to provide a cost−effective solution for
regulating current in LEDs (similar to Constant Current Diode, CCD).
The CCR is based on Self-Biased Transistor (SBT) technology and
regulates current over a wide voltage range. It is designed with a
negative temperature coefficient to protect LEDs from thermal
runaway at extreme voltages and currents.
The CCR turns on immediately and is at 25% of regulation with
only 0.5 V Vak. It requires no external components allowing it to be
designed as a high or low−side regulator. The high anode-cathode
voltage rating withstands surges common in Automotive, Industrial
and Commercial Signage applications. The CCR comes in thermally
robust packages and is qualified to be UL94−V0 certified.
Features
• Robust Power Package: 460 mW
• Wide Operating Voltage Range
• Immediate Turn-On
• Voltage Surge Suppressing − Protecting LEDs
• SBT (Self−Biased Transistor) Technology
• Negative Temperature Coefficient
• NSV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q101
Qualified and PPAP Capable
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Automobile: Chevron Side Mirror Markers, Cluster, Display &
Instrument Backlighting, CHMSL, Map Light
• AC Lighting Panels, Display Signage, Decorative Lighting, Channel
Lettering
• Switch Contact Wetting
• Application Note AND8391/D − Power Dissipation Considerations
• Application Note AND8349/D − Automotive CHMSL
MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
Rating
Symbol
Value
Unit
Anode−Cathode Voltage
Vak Max
45
V
Reverse Voltage
Operating and Storage Junction
Temperature Range
VR
TJ, Tstg
500
−55 to +150
mV
°C
ESD Rating: Human Body Model
Machine Model
ESD
Class 1C
Class B
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.
http://onsemi.com
Ireg(SS) = 20 mA
@ Vak = 7.5 V
Anode 2
Cathode 1
2
1
SOD−123
CASE 425
STYLE 1
MARKING DIAGRAM
AC M G
1 G2
AC = Device Code
M = Date Code
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping†
NSI45020T1G
SOD−123 3000 / Tape & Reel
(Pb−Free)
NSV45020T1G SOD−123 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, 2014
June, 2014 − Rev. 6
1
Publication Order Number:
NSI45020/D
1 page  
NSI45020T1G
APPLICATIONS INFORMATION
The CCR is a self biased transistor designed to regulate the
current through itself and any devices in series with it. The
device has a slight negative temperature coefficient, as
shown in Figure 2 – Tri Temp. (i.e. if the temperature
increases the current will decrease). This negative
temperature coefficient will protect the LEDS by reducing
the current as temperature rises.
The CCR turns on immediately and is typically at 20% of
regulation with only 0.5 V across it.
The device is capable of handling voltage for short
durations of up to 45 V so long as the die temperature does
not exceed 150°C. The determination will depend on the
thermal pad it is mounted on, the ambient temperature, the
pulse duration, pulse shape and repetition.
Single LED String
The CCR can be placed in series with LEDs as a High Side
or a Low Side Driver. The number of the LEDs can vary
from one to an unlimited number. The designer needs to
calculate the maximum voltage across the CCR by taking the
maximum input voltage less the voltage across the LED
string (Figures 7 and 8).
Figure 8.
Higher Current LED Strings
Two or more fixed current CCRs can be connected in
parallel. The current through them is additive (Figure 9).
Figure 7.
Figure 9.
http://onsemi.com
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