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PDF NSI50350AST3G Data sheet ( Hoja de datos )
| Número de pieza | NSI50350AST3G | |
| Descripción | Constant Current Regulator & LED Driver | |
| Fabricantes | ON Semiconductor | |
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NSI50350AST3G
Constant Current Regulator
& LED Driver
50 V, 350 mA + 10%, 5.8 W 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. 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 20% 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 AEC−Q101 standard and
UL94−V0 Certified.
Also available in DPAK: NSI50350ADT4G.
Features
• Robust Power Package: 5.8 W
• Wide Operating Voltage Range
• Immediate Turn−On
• Voltage Surge Suppressing − Protecting LEDs
• UL94−V0 Certified
• 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
Typical Applications
• Automobile: Chevron Side Mirror Markers, Cluster, Display &
Instrument Backlighting, CHMSL, Map Light
• AC Lighting Panels, Display Signage, Decorative Lighting, Channel
Lettering
• Application Note AND8349/D − Automotive CHMSL
• Application Notes AND8391/D, AND9008/D − Power Dissipation
Considerations
Mechanical Characteristics
• CASE: Void-free, transfer-molded, thermosetting plastic
• FINISH: All external surfaces are corrosion resistant and leads are
readily solderable
• MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
260°C for 10 seconds
• LEADS: Modified L−Bend providing more contact area to bond pads
• POLARITY: Cathode indicated by molded polarity notch
• MOUNTING POSITIONS: Any
http://onsemi.com
Ireg(SS) = 350 mA
@ Vak = 7.5 V
Anode 2
Cathode 1
1
2
SMC
CASE 403
MARKING DIAGRAM
AYWW
1 350AG 2
G
350A = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping†
NSI50350AST3G
SMC
(Pb−Free)
2500 / Tape &
Reel
NSV50350AST3G SMC
(Pb−Free)
2500 / 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, 2014
August, 2014 − Rev. 5
1
Publication Order Number:
NSI50350AS/D
1 page  
NSI50350AST3G
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 50 V so long as the die temperature does
not exceed 175°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.
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| PDF Descargar | [ Datasheet NSI50350AST3G.PDF ] | |
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