Nichia STSE-CC6065A-3
<Cat.No.070615>
7.CAUTIONS
The
LEDs are devices which are materialized by combining Blue LEDs and special phosphors.
Consequently, the color of the LEDs is changed a little by an operating current.
Care should be taken after due consideration when using LEDs.
(1) Moisture Proof Package
· When moisture is absorbed into the SMT package it may vaporize and expand during soldering.
There is a possibility that this can cause exfoliation of the contacts and damage the optical
characteristics of the LEDs.
For this reason, the moisture proof package is used to keep moisture
to a minimum in the package.
· The moisture proof package is made of an aluminum moisture proof bag. A package of
a moisture absorbent material (silica gel) is inserted into the aluminium moisture proof bag.
The silica gel changes its color from blue to pink as it absorbs moisture.
(2) Storage
· Storage Conditions
Before opening the package :
The LEDs should be kept at 30°C or less and 90%RH or less. The LEDs should be used within
a year.
When storing the LEDs, moisture proof packaging with absorbent material (silica gel)
is recommended.
After opening the package :
The LEDs should be kept at 30°C or less and 70%RH or less. The LEDs should be soldered
within 168 hours (7days) after opening the package.
If unused LEDs remain, they should be
stored in the moisture proof packages, such as sealed containers with packages of moisture
absorbent material (silica gel).
It is also recommended to return the LEDs to the original
moisture proof bag and to reseal the moisture proof bag again.
· If the moisture absorbent material (silica gel) has faded away or the LEDs have exceeded the storage
time, baking treatment should be performed using the following condition.
Baking treatment : more than 24 hours at 65 ± 5°C
· Nichia LED electrodes, leadframes and Die Heat sink are silver plated copper alloy.
The silver surface may be affected by environments which contain corrosive substances.
Please avoid conditions which may cause the LED to corrode, tarnish or discolor.
This corrosion or
discoloration might lower solderability or might affect on optical characteristics. There is a possibility
of accelerate corrosion if the LEDs are exposed to corrosive substances in high temperature.
· Please avoid rapid transitions in ambient temperature, especially in high humidity environments where
condensation can occur.
(3) Recommended circuit
· In designing a circuit, the current through each LED must not exceed its absolute maximum rating.
It is recommended to use Circuit B which regulates the current flowing through each LED.
In the meanwhile, when driving LEDs with a constant voltage in Circuit A, the current through
the LEDs may vary due to the variation in forward voltage (V
F
) of the LEDs. In the worst case,
some LED may be subjected to stresses in excess of the absolute maximum rating.
(A)
...
(B)
...
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NICHIA [ NICHIA CORPORATION ]
