AL8807EV4

Issue 2 – May 2012

© Diodes Incorporated 2012

www.diodes.com

2 of 8

Quick Start Guide

Suitable Test Equipment

Count

Description

Manufacturer

Part Number

1

Adjustable Power Supply, 12V

2A

Thurlby Thandar

CPX400A

2

Digital Multimeter

Fluke

179

1

Digital Storage Oscilloscope

Tektronix

TDS2024B

2

LED, high brightness, “Dragon

Diamond”, series connected on

suitable heat conducting PCB

Osram

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 AL8807EV4 board to the equipment as in Figure 1 below. Set DMM1 and

DMM2 to measure current up to 2A.

Figure 1: Test Schematic using VDC Input

3.

Cover the LEDs to avoid dazzling.

4.

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

(DMM1) is approximately 690mA. The output current (DMM2) is approximately 1.12A. The

input voltage can be varied from approximately 9VDC 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!!

DMM

2

A

POWER SUPPLY

+

-

P2

P1

A

K

DMM

1

A

A