NICHIA STS-DA1-2851F <Cat.No.150622>

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(5) Electrostatic Discharge (ESD)

● The products are sensitive to static electricity or surge voltage. ESD can damage a die and its reliability.

When handling the products, the following measures against electrostatic discharge are strongly recommended:

Eliminating the charge

Grounded wrist strap, ESD footwear, clothes, and floors

Grounded workstation equipment and tools

ESD table/shelf mat made of conductive materials

● Ensure that tools, jigs and machines that are being used are properly grounded and

that proper grounding techniques are used in work areas. For devices/equipment that mount the LEDs,

protection against surge voltages should also be used.

● If tools or equipment contain insulating materials such as glass or plastic,

the following measures against electrostatic discharge are strongly recommended:

Dissipating static charge with conductive materials

Preventing charge generation with moisture

Neutralizing the charge with ionizers

● The customer is advised to check if the LEDs are damaged by ESD

when performing the characteristics inspection of the LEDs in the application.

Damage can be detected with a forward voltage measurement or a light-up test at low current (≤1mA).

● ESD damaged LEDs may have current flow at a low voltage or no longer illuminate at a low current.

(6) Thermal Management

● Proper thermal management is an important when designing products with LEDs. LED die temperature is affected

by PCB thermal resistance and LED spacing on the board. Please design products in a way that the LED die temperature

● The following equations can be used to calculate the junction temperature of the products.

(7) Cleaning

● The LEDs should not be cleaned with water, benzine, and/or thinner.

● If required, isopropyl alcohol (IPA) should be used. Other solvents may cause premature failure to the LEDs

due to the damage to the resin portion. The effects of such solvents should be verified prior to use.

In addition, the use of CFCs such as Freon is heavily regulated.

● When dust and/or dirt adheres to the LEDs, soak a cloth with Isopropyl alcohol (IPA), then squeeze it before wiping the LEDs.

● Ultrasonic cleaning is not recommended since it may have adverse effects on the LEDs

depending on the ultrasonic power and how LED is assembled.

If ultrasonic cleaning must be used, the customer is advised to make sure the LEDs will not be damaged prior to cleaning.