Electrical/Optical

These versatile bar graph arrays are composed of ten

light emitting diodes. The light from each LED is optically

stretched to form individual elements. The Red (HDSP-

4820) bar graph array LEDs use a p-n junction diffused

into a GaAsP epitaxial layer on a GaAs substrate. The Al-

GaAs Red (HLCP-J100) bar graph array LEDs use double

heterojunction AlGaAs on a GaAs substrate. HER (HDSP-

4830) and Yellow (HDSP-4840) bar graph array LEDs use

a GaAsP epitaxial layer on a GaP substrate. Green (HDSP-

4850) bar graph array LEDs use liquid phase GaP epi-

taxial layer on a GaP substrate. The multicolor bar graph

arrays (HDSP-4832/4836) have HER, Yellow, and Green

LEDs in one package. These displays are designed for

strobed operation. The typical forward voltage values

can be scaled from Figures 5 and 11. These values should

be used to calculate the current limiting resistor value

values for driver circuit design and maximum power dis-

Standard Red HDSP-4820 series

:)

t 5 mA

AlGaAs Red HLCP-J100 series

:)

d 20 mA

:)

t 20 mA

HER (HDSP-4830) and Yellow

(HDSP-4840) series

:)

For: 5 mA

:)

t 20 mA

Green (HDSP-4850) series

:)

For product information and a complete list of distributors, please go to our web site:

www.avagotech.com

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.

Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved. Obsoletes AV01-0277EN

AV02-1798EN - November 5, 2009

Figures 4 and 10 allow the designer to calculate the lu-

minous intensity at different peak and average currents.

The following equation calculates intensity at different

peak and average currents:

SHEET)

Where:

scaled from Figure 4 or 10.

For example, what is the luminous intensity of an HDSP-

4830 driven at 50 mA peak 1/5 duty factor?

Pcd

Therefore