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NSI45090JDT4G の電気的特性と機能

NSI45090JDT4GのメーカーはON Semiconductorです、この部品の機能は「Adjustable Constant Current Regulator & LED Driver」です。


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部品番号 NSI45090JDT4G
部品説明 Adjustable Constant Current Regulator & LED Driver
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NSI45090JDT4G Datasheet, NSI45090JDT4G PDF,ピン配置, 機能
NSI45090JDT4G
Adjustable Constant Current
Regulator & LED Driver
45 V, 90 − 160 mA + 15%, 2.7 W Package
The adjustable 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 20% of regulation with
only 0.5 V Vak. The Radj pin allows Ireg(SS) to be adjusted to higher
currents by attaching a resistor between Radj (Pin 3) and the Cathode
(Pin 4). The Radj pin can also be left open (No Connect) if no
adjustment is required. 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. This device is
available in a thermally robust package and is qualified to stringent
AEC−Q101 standard, which is lead-free RoHS compliant and uses
halogen-free molding compound, and UL94−V0 certified.
Features
Robust Power Package: 2.7 Watts
Adjustable up to 160 mA
Wide Operating Voltage Range
Immediate Turn-On
Voltage Surge Suppressing − Protecting LEDs
UL94−V0 Certified
SBT (Self−Biased Transistor) Technology
Negative Temperature Coefficient
Eliminates Additional Regulation
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
http://onsemi.com
Ireg(SS) = 90 − 160 mA
@ Vak = 7.5 V
Anode
1
3
Radj
4
Cathode
4
12
3
DPAK
CASE 369C
MARKING DIAGRAM
1
A
Radj
YWW
NSI
90JG
C
Y = Year
WW = Work Week
NSI90J = Specific Device Code
G = Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping
NSI45090JDT4G
DPAK 2500/Tape & Reel
(Pb−Free)
NSV45090JDT4G DPAK 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 Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2014
April, 2014 − Rev. 3
1
Publication Order Number:
NSI45090JD/D

1 Page





NSI45090JDT4G pdf, ピン配列
NSI45090JDT4G
THERMAL CHARACTERISTICS
Characteristic
Symbol
Max
Unit
Total Device Dissipation (Note 5) TA = 25°C
Derate above 25°C
PD
1771
mW
14.16
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 5)
Thermal Reference, Junction−to−Lead 4 (Note 5)
Total Device Dissipation (Note 6) TA = 25°C
Derate above 25°C
RθJA
RψJL4
PD
70.6
6.8
2083
16.67
°C/W
°C/W
mW
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 6)
Thermal Reference, Junction−to−Lead 4 (Note 6)
Total Device Dissipation (Note 7) TA = 25°C
Derate above 25°C
RθJA
RψJL4
PD
60
6.3
2080
16.64
°C/W
°C/W
mW
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 7)
Thermal Reference, Junction−to−Lead 4 (Note 7)
Total Device Dissipation (Note 8) TA = 25°C
Derate above 25°C
RθJA
RψJL4
PD
60.1
6.5
2441
19.53
°C/W
°C/W
mW
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 8)
Thermal Reference, Junction−to−Lead 4 (Note 8)
Total Device Dissipation (Note 9) TA = 25°C
Derate above 25°C
RθJA
RψJL4
PD
51.2
5.9
2309
18.47
°C/W
°C/W
mW
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 9)
Thermal Reference, Junction−to−Lead 4 (Note 9)
Total Device Dissipation (Note 10) TA = 25°C
Derate above 25°C
RθJA
RψJL4
PD
54.1
6.2
2713
21.71
°C/W
°C/W
mW
mW/°C
Thermal Resistance, Junction−to−Ambient (Note 10)
RθJA
46.1 °C/W
Thermal Reference, Junction−to−Lead 4 (Note 10)
RψJL4
5.7 °C/W
Junction and Storage Temperature Range
TJ, Tstg
−55 to +175
°C
NOTE: Lead measurements are made by non−contact methods such as IR with treated surface to increase emissivity to 0.9.
Lead temperature measurement by attaching a T/C may yield values as high as 30% higher °C/W values based upon empirical
measurements and method of attachment.
5. FR−4 @ 300 mm2, 1 oz. copper traces, still air.
6. FR−4 @ 300 mm2, 2 oz. copper traces, still air.
7. FR−4 @ 500 mm2, 1 oz. copper traces, still air.
8. FR−4 @ 500 mm2, 2 oz. copper traces, still air.
9. FR−4 @ 700 mm2, 1 oz. copper traces, still air.
10. FR−4 @ 700 mm2, 2 oz. copper traces, still air.
http://onsemi.com
3


3Pages


NSI45090JDT4G 電子部品, 半導体
NSI45090JDT4G
Other Currents
The adjustable CCR can be placed in parallel with any
other CCR to obtain a desired current. The adjustable CCR
provides the ability to adjust the current as LED efficiency
increases to obtain the same light output (Figure 11).
LEDs on and off for a portion of a single cycle. This on/off
cycle is called the Duty cycle (D) and is expressed by the
amount of time the LEDs are on (Ton) divided by the total
time of an on/off cycle (Ts) (Figure 13).
Figure 11.
Dimming using PWM
The dimming of an LED string can be easily achieved by
placing a BJT in series with the CCR (Figure 12).
Figure 12.
The method of pulsing the current through the LEDs is
known as Pulse Width Modulation (PWM) and has become
the preferred method of changing the light level. LEDs being
a silicon device, turn on and off rapidly in response to the
current through them being turned on and off. The switching
time is in the order of 100 nanoseconds, this equates to a
maximum frequency of 10 Mhz, and applications will
typically operate from a 100 Hz to 100 kHz. Below 100 Hz
the human eye will detect a flicker from the light emitted
from the LEDs. Between 500 Hz and 20 kHz the circuit may
generate audible sound. Dimming is achieved by turning the
Figure 13.
The current through the LEDs is constant during the period
they are turned on resulting in the light being consistent with
no shift in chromaticity (color). The brightness is in proportion
to the percentage of time that the LEDs are turned on.
Figure 14 is a typical response of Luminance vs Duty Cycle.
6000
5000
4000
3000
2000
1000
Lux
Linear
0
0 10 20 30 40 50 60 70 80 90 100
DUTY CYCLE (%)
Figure 14. Luminous Emmitance vs. Duty Cycle
Reducing EMI
Designers creating circuits switching medium to high
currents need to be concerned about Electromagnetic
Interference (EMI). The LEDs and the CCR switch
extremely fast, less than 100 nanoseconds. To help eliminate
EMI, a capacitor can be added to the circuit across R2.
(Figure 12) This will cause the slope on the rising and falling
edge on the current through the circuit to be extended. The
slope of the CCR on/off current can be controlled by the
values of R1 and C1.
The selected delay / slope will impact the frequency that
is selected to operate the dimming circuit. The longer the
delay, the lower the frequency will be. The delay time should
not be less than a 10:1 ratio of the minimum on time. The
frequency is also impacted by the resolution and dimming
steps that are required. With a delay of 1.5 microseconds on
the rise and the fall edges, the minimum on time would be
30 microseconds. If the design called for a resolution of 100
dimming steps, then a total duty cycle time (Ts) of 3
milliseconds or a frequency of 333 Hz will be required.
http://onsemi.com
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部品番号部品説明メーカ
NSI45090JDT4G

Adjustable Constant Current Regulator & LED Driver

ON Semiconductor
ON Semiconductor


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