AL8806EV4

Issue 2 – July 2011

© Diodes Incorporated 2011

www.diodes.com

2 of 12

Quick Start Guide

Suitable Test Equipment

Count

Description

Manufacturer

Part Number

1

Adjustable Power Supply, up to

30V 2A

Thurlby Thandar

CPX400A

2

Digital Multimeter

Fluke

179

1

Digital Storage Oscilloscope

Tektronix

TDS2024B

2

LED, high brightness, 2A,

connected on suitable heat

conducting PCB

Lamp Operation

1.

Set the power supply to 12.0V but do not switch on. Set the current limit to 2.0A.

2.

Connect up the AL8806EV4 board to the equipment as in Figure 1 below. Set DMM1 and

DMM2 to measure current up to 2A.

Figure 1: Test Schematic

3.

Cover the LEDs to avoid dazzling.

4.

Switch on the power supply. This should illuminate the LEDs. Note that the input current

(DMM1) depends on the LED volt drop. The input current is approximately 900mA if the total

LED volt drop is about 6.9V. The output current (DMM2) is approximately 1.47A. The input

voltage can be varied from approximately 8.5VDC to 30VDC and the current regulation

observed is typically within ±2%.

CAUTION:

The LEDs are very bright.

Ensure they are

hidden from direct view, or covered with a dispersing

filter. The lid from an aerosol can is convenient for this.

Also the LEDs are very hot. Do not touch!!