NS2W123BT NICHIA CORPORATION, NS2W123BT Datasheet - Page 9

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NS2W123BT

Manufacturer Part Number
NS2W123BT
Description
Specifications For Nichia Chip Type White Led
Manufacturer
NICHIA CORPORATION
Datasheet

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(7) Cleaning
(8) Heat Generation
(9) Safety Guideline for Human Eyes
· It is recommended that isopropyl alcohol be used as a solvent for cleaning the LEDs.
· Do not clean the LEDs by the ultrasonic.
· Thermal design of the end product is of paramount importance.
· Please determine the operating current with consideration of the ambient temperature local to the LED
· The equation 1 indicates correlation between Tj and Ta, and the equation 2 indicates correlation
· The International Electrical Commission (IEC) published in 2006 IEC 62471:2006 Photobiological
other solvents, it should be confirmed beforehand whether the solvents will dissolve the package and the
resin or not.
cleaning on the LEDs depends on factors such as ultrasonic power and the assembled condition.
Before cleaning, a pre-test should be done to confirm whether any damage to the LEDs will occur.
of the LED when making the system design.
electric power is affected by the thermal resistance of the circuit board and density of LED placement
on the board, as well as other components.
within the maximum ratings given in this specification.
and refer to the plot of Ambient temperature vs. Allowable Forward Current on CHARACTERISTICS
in this specifications. Please also take measures to remove heat from the area near the LED to improve
the operational characteristics of the LED.
between Tj and Ts1.
safety of lamps and lamp systems which includes LEDs within its scope. Meanwhile LEDs were
removed from the scope of the IEC 60825-1:2007 laser safety standard, the 2001 edition of which
included LED sources within its scope. However, keep in mind that some countries and regions have
adopted standards based on the IEC laser safety standard IEC 60825-1:2001 which includes LEDs
within its scope.
Following IEC 62471:2006, most of Nichia LEDs can be classified as belonging to either Exempt
Group or Risk Group 1. Optical characteristics of a LED such as radiant flux, spectrum and light
distribution are factors that affect the risk group determination of the LED. Especially a high-power
LED, that emits light containing blue wavelengths, may be in Risk Group 2.
Great care should be taken when viewing directly the LED driven at high current or the LED with
optical instruments, which may greatly increase the hazard to your eyes.
Tj=Ta + Rja W
Tj = Dice Temperature : °C, Ta = Ambient Temperature : °C,
Ts1 = Solder Temperature (Cathode Side) : °C,
Rja = Heat resistance from Dice to Ambient temperature : °C /W,
Rjs1 = Heat resistance from Dice to Ts1 measuring point ≒ 40°C /W,
W = Inputting Power (I
Freon solvents should not be used to clean the LEDs because of worldwide regulations.
1
F
V
F
) : W
Tj=Ts1 + Rjs1 W
When it is absolutely necessary, the influence of ultrasonic
It is necessary to avoid intense heat generation and operate
The coefficient of temperature increase per input
-8-
2
Please consider the heat generation
Ts1 Point
Nichia STS-DA1-0500C
<Cat.No.090602>
When using
Cathode
Anode

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