LITE-ON TECHNOLOGY CORPORATION

P r o p e r t y o f L i t e - O n O n l y

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).

2. 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.

3. 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.

temperature might seriously result in serious melting of the housing.

6. Drive Method

LED, a current operated device, requires specific current limit incorporated into the driving circuit. The current

control can be achieved by using a resistor in series with the LED. In order to prevent to exceed the allowed

value of 40% over desired forward current, the resistor should be well chosen for possible voltage variation. Two

possible circuit designs are shown below. The circuit A is recommended, and the circuit B will probably result in

uneven brightness between LEDs because of the Vf-If characteristics of LEDs.

Circuit model A

Circuit model B

LED

LED

Part

No. : LTL307JGT

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