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[ UTZ-SC0567_0]

2018/06/11

(1) Operating method



The LD shall change its forward voltage requirement and optical output power according to temperature change. Also, the

LD will require more operation current to maintain same output power as it degrades. In order to maintain output power, use

of APC (Automatic Power Control) is recommended, which use feedback of the optical output power to adjust the operation

current.



Confirm that the optical output power generated by spike current when switching on and off does not exceed the maximum

absolute rating.

Also, employ appropriate countermeasures to reduce chattering and/or overshooting in the Circuit.

(2) Design Consideration



LDs may fail as either a short circuit or an open circuit. If an LD shorts during operation, the forward voltage of the LD

may fluctuate greatly. When designing a circuit, ensure that both short and open circuits are considered and that there will

be no issues if a short or open circuit occurs.

(3) Static Electricity



Static electricity or electrical surges will reduce and degrade the reliability of the LDs. It is recommended to use a wrist

strap or anti-electrostatic glove when handling the Product.

(4) Absolute Maximum Rating



Active layer of LDs shall have high current density and generate high electric field during its operation.

In order to

prevent excessive damage, the LD must be operated strictly below Absolute Max Rating.



During operation, if the forward current and/or optical output power are increased the lifetime of the LDs will decrease.

Ensure that the LDs are operated within the recommended conditions.

(5) Others



Nichia LDs described in this brochure are intended to be used for ordinary electronic equipment (such as office equipment,

communications equipment, measurement instruments and household appliances). Consult Nichia’s sales staff in advance

for information on the applications in which exceptional quality and reliability are required, particularly when the failure or

malfunction of the LDs may directly jeopardize life or health (such as for airplanes, aerospace, submersible repeaters,

nuclear reactor control systems, automobiles, traffic control equipment, life support systems and safety devices).



The Purchaser must acknowledge that any LD can statistically fail and must design its equipments in a fail safe design.

Prior to use of the LD, please confirm that the LD, as described in Nichia’s specifications, meets the life expectancy needs

of, and provides the features required by the Circuit and any related modules, equipment and/or systems.



Due to its short wavelength and high optical output power, optical depositions on optical path may occur depending on

surrounding conditions. Appropriate design or countermeasures should be used to avoid optical depositions.



Nichia prohibits Purchaser from reverse engineering, disassembling, or taking any other steps to derive the structure or

design of the LD.



The appearance and specifications of the product may be modified for improvement without notice. The formal

specifications must be exchanged and signed by both parties before large volume purchase begins.



No unauthorized transmission or reproduction of this document, either in whole or in part, is permitted.