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Part No. : LTPA-P3528SWL

BNS-OD-FC002/A4

Light LED

LTPA-P3528SWL

7.5 Drive Method

A 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

(A) Recommended circuit.

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

of those LEDs.

7.6 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.

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

ESD-damaged LEDs will exhibit abnormal characteristics such as high reverse leakage current, low forward Voltage, or

“no light-up” at low currents.

To verify for ESD damage, check for “light up” and Vf of the suspect LEDs at low currents.

The Vf of “good” LEDs should be>2.0V@0.1mA for InGaN product.forward voltage, or “no lightup” at low currents.

To verify for ESD damage, check

for “lightup” and VF of the suspect LEDs at low currents.

LED

LED