Avago Technologies

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ASMB-6WD0/ASMB-6WZ0

Data Sheet

Precautionary Notes

Application Precautions

a.

Drive current of the LED must not exceed the maximum allowable limit across temperature as stated in the datasheet.

Constant current driving is recommended to ensure consistent performance.

b.

LEDs do exhibit slightly different characteristics at different drive currents that might result in larger performance variations

(i.e., intensity, wavelength, and forward voltage). The user is recommended to set the application current as close as possible to

the test current to minimize these variations.

c.

LED is not intended for reverse bias. Do use other appropriate components for such purpose. When driving the LED in matrix

form, it is crucial to ensure that the reverse bias voltage is not exceeding the allowable limit of the LED.

d.

Do not use the LED in the vicinity of material with sulfur content, in environment of high gaseous sulfur compound and

corrosive elements. Examples of material that may contain sulfur are rubber gasket, RTV (room temperature vulcanizing)

silicone rubber, rubber gloves etc. Prolonged exposure to such environment may affect the optical characteristics and product

life.

e.

Avoid rapid change in ambient temperature especially in high humidity environment as this will cause condensation on the

LED.

f.

Number of reflow cycle and reflow temperature condition used may affect optical characteristics of the LED. It is

recommended to use LEDs with the same number of reflow cycle and same reflow temperature condition within the same

finished good.

Thermal Management

Optical, electrical and reliability characteristics of LED are affected by temperature. The junction temperature (TJ) of the LED must

be kept below allowable limit at all times. TJ can be calculated as below:

where

= ambient temperature [°C]

R

= forward current [A]

from system to system depending on design and is usually not known.

all maximum ratings stated in the datasheet.

Eye Safety Precautions

LEDs may pose optical hazards when in operation. It is not advisable to view directly at operating LEDs as it may be harmful to the

eyes. For safety reasons, use appropriate shielding or personal protective equipment.

where

= LED solder point temperature as shown in illustration below [°C]

R