LITE-ON TECHNOLOGY CORPORATION

Property of Lite

Property of Lite

Property of Lite

Property of Lite -

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- O n Only

On Only

On Only

On Only

CAUTIONS

1. Application limitation

The LEDs described here are intended to be used for ordinary electronic equipment (such as office equipment,

communication equipment and household application.) Consult Liteon’s sales in advance for information on

application in which exceptional quality and reliability are required, particularly when the failure or malfunction

of the LEDs may directly jeopardize life or health (such as airplanes, automobiles, traffic control equipment, life

support system and safety devices).

5. Storage

After being shipped from Liteon the LEDs should be kept at 30°C or less and 70%RH or less.

The LEDs should be used within 3 months. They can be stored for a year in a sealed container with a nitrogen

atmosphere and moisture absorbent material. Please avoid rapid transitions in ambient temperature in high

humidity environments where condensation may occur.

5. Cleaning

Use alcohol-based cleaning solvents such as isopropyl alcohol to clean the LED.

4. Forming & Mounting

When forming a lead, the leads should be bent at a point at least 3mm from the base of epoxy bulb. Do not use

the base of the leadframe as a fulcrum during forming. Lead forming must be done before soldering at normal

temperature. When mounted through hole type LED lamp, avoid the occurrence of residual mechanical stress

due to clinching.

5. Soldering

When soldering, leave a minimum of 2mm clearance from the resin to the soldering point.

Dipping the resin into the solder must be avoided.

Do not apply any stress to the lead frame during soldering while the LED is at high temperature.

Recommended soldering condition

Soldering iron

Wave soldering

Temperature

Soldering time

300°C Max.

3 sec. Max.

(one time only)

Pre-heat

Pre-heat time

Solder wave

Soldering time

100°C Max.

60 sec. Max.

260°C Max.

10 sec. Max.

6. Drive Method

LED is a current operated device, and therefore, requires some kind of current limiting incorporated into the

drive circuit. This current limiting typically takes the form of a current limiter resistor placed in series with

the LED. Consider worst case voltage variations that could occur across the current limiting resistor.

The forward current should not be allowed to change by more than 40% of its desired value.

Circuit model A

Circuit model B

LED

LED

(A) Recommended circuit.

(B) The difference of brightness between LEDs could be found due to the Vf-If characteristics of LED

Part No. : LTL-4223-051A

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