AL5811EV1 User Guide

75mA, 60V Low-side Adjustable Linear LED Driver

AL5811EV1 Rev2

Page 3 of 8

January 2013

www.diodes.com

1. By default, the evaluation board is preset at 75mA as low side current LED configuration.

2. Ensure that the DC source is switched OFF or disconnected.

5. Connect the cathode wire of external LED string to LED terminal of the board.

6. Load 10KΩ to R1 on the board. Do not load any components on R2 and R3.

7. Ensure that the area around the board is clear and safe, and preferably that the board and

LEDs are enclosed in a transparent safety cover.

8. Turn on the main switch. LED string should light up with LED.

Other Typical Circuit Design Options

I) Current LED String Procedure in High side current LED configuration

1. The evaluation can be configured as High side current LED configuration.

2. Ensure that the DC source is switched OFF or disconnected.

4. Connect the GND wire of the DC power supply to GND terminals on the board.

5. Connect the anode wire of external LED string to floating GND of the board.

6. Connect the cathode wire of external LED string to earth GND of the DC power supply.

7. Load 10KΩ to R1 on the board. Do not load any components on R2 and R3.

8. Observe MAX 60V differential between VIN and floating GND when applied VIN > 60V.

caution and try not to touch any components on the board or input leads.

10. Turn on the main switch. LED string should light up with LED.