NSSM032A Datasheet, PDF (15/17 Pages) NICHIA CORPORATION – rohs compliant

NICHIA STS-DA1-3207A <Cat.No.150528>
(2) Directions for Use
● In designing a circuit, the current through each LED die must not exceed the Absolute Maximum Rating current
specified for each die.
It is recommended that each LED die is driven at a constant current.
● When having the two or more dice within this product on at the same time, the total power dissipation for the LED package
must be within the absolute maximum value specified in this specification.
● This product should be operated using forward current. Ensure that the product is not subjected to
either forward or reverse voltage while it is not in use. In particular, subjecting it to continuous reverse voltage
may cause migration, which may cause damage to the LED die. When used in displays that are not used for a long time,
the main power supply should be switched off for safety.
● It is recommended to operate the LEDs at a current greater than 10% of the sorting current to stabilize the LED characteristics.
● Care must be taken to ensure that the reverse voltage will not exceed the Absolute Maximum Rating
when using the LEDs with matrix drive.
● Ensure that excessive voltages such as lightning surges are not applied to the LEDs.
● Aging is recommended for detecting manufacturing and assembly defects. In particular, ensure that excessive current
and/or voltage is not applied to the LEDs. This aging should be conducted in environments where water condensation
does not occur.
● This product can be used in both indoor and outdoor applications; however, when the LEDs are used in the following environments,
incorporate sufficient measures into the display to prevent debris, water/moisture and gases
that will adversely affect the product.
- where water vapor is abundant
- where water condensation is likely to occur
- where water is likely to splash onto the LEDs
- where frost is likely to form on the surface of the LEDs (e.g. freezer, ice skating rink, etc.)
- where dust, dirt, debris, loose metallic materials and/or gases that will adversely affect the product are present
● When this product is used for displays that will be installed outside, the leads of the LEDs should be covered with silicone resin
to avoid exposure to outdoor environments. When silicone resin is filled up to the height of the 1-pin mark of the LED,
the LED lens will absorb less moisture. Choose a silicone resin that is sufficient to prevent water/moisture penetration
and salt damage.
● Reducing direct sunlight will be able to extend the life (Example: using a louver).
● The loss of luminous output due to sunlight can be minimized if the LEDs are used with louvers
and mounted in an orientation where the LED dice are vertically arranged in BGR order (Blue on top).
● In areas where hydrogen sulfide, which is a sulfide-based gas, is present (e.g. hot springs and volcanic areas),
and where salt is abundant (e.g. coastal areas), the life may be shortened.
● When power is applied for the first time after installation, the display should not be powered at 100% wattage
since the LEDs may have absorbed moisture. Before normal use of this display, operate the display at approximately 20% wattage
for an initial time period.
● If the display units will be rented, those units should be selected carefully to ensure that the display as a whole
will appear the same color and brightness.
● If the display units are loaded onto and/or transported by ship, the damp environment on the vessel will cause condensation;
the display units should be packaged to prevent moisture absorption.
● If a display that has been, or is being, used is relocated, it is possible that degradation of the LED has occurred.
When transporting this display, provide sufficient protection for the LEDs in addition to the moisture-proof packaging
for the display. When this display is reinstalled, ensure to follow the installation instructions for environments and use.
(3) Handling Precautions
● Do not handle the LEDs with bare hands as it will contaminate the LED surface and may affect the optical characteristics:
it might cause the LED to be deformed and/or the wire to break, which will cause the LED not to illuminate.
The lead could also cause an injury.
● When handling the product with tweezers, be careful not to apply excessive force to the resin.
Otherwise, The resin can be cut, chipped, delaminate or deformed, causing wire-bond breaks and catastrophic failures.
● Dropping the product may cause damage.
● Do not stack assembled PCBs together. Failure to comply can cause the resin portion of the product to be cut, chipped,
delaminated and/or deformed. It may cause wire to break, leading to catastrophic failures.
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