LITE-ON

TECHNOLOGY

CORPORATION

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

Part

No. : LTW-M670GS

Page :

9

of

11

BNS-OD-C131/A4

CAUTIONS

1. Application

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

equipment, communication equipment and household applications).Consult Liteon’s Sales in advance

for information on applications in which exceptional reliability is required, particularly when the failure

or malfunction of the LEDs may directly jeopardize life or health (such as in aviation, transportation,

traffic control equipment, medical and life support systems and safety devices).

2. Storage

The storage ambient for the LEDs should not exceed 30°C temperature or 70% relative humidity.

It is recommended that LEDs out of their original packaging are IR-reflowed within one week.

For extended storage out of their original packaging, it is recommended that the LEDs be stored in a

sealed container with appropriate desiccant, or in desiccators with nitrogen ambient.

LEDs stored out of their original packaging for more than a week should be baked at about 60 deg C for

at least 24 hours before solder assembly.

3. Cleaning

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

4. Soldering

Recommended soldering conditions:

Reflow soldering

Wave Soldering

Soldering iron

Pre-heat

Pre-heat time

Soldering

Temp.

Soldering time

120~150°C

120 sec. Max.

260°C Max.

30 sec. Max.

Pre-heat

Pre-heat time

Solder wave

Soldering time

100°C Max.

60 sec. Max.

260°C Max.

10 sec. Max.

Temperature

Soldering time

300°C Max.

3 sec. Max.

(one time only)

5. Drive Method

An LED is a current-operated device. In order to ensure intensity uniformity on multiple LEDs

connected in parallel in an application, it is recommended that a current limiting resistor be incorporated

in the drive circuit, in series with each LED as shown in Circuit A below.

Circuit model A

Circuit model B

LED

LED

(A) Recommended circuit.

(B) The brightness of each LED might appear different due to the differences in the I-V characteristics of

those LEDs.

6. ESD (Electrostatic Discharge)

Static Electricity or power surge will damage the LED.

Suggestions to prevent ESD damage:

Use of a conductive wrist band or anti-electrostatic glove when handling these LEDs.

All devices, equipment, and machinery must be properly grounded.

Work tables, storage racks, etc. should be properly grounded.

Use ion blower to neutralize the static charge which might have built up on surface of the LED’s plastic

lens as a result of friction between LEDs during storage and handling.