Issue 1 – August 2010

www.diodes.com

© Diodes Incorporated, 2010

AL8805EV2 EVALUATION BOARD USER GUIDE

DESCRIPTION

AL8805EV2 is an evaluation board showing the application of the Diodes Incorporated AL8805 LED driver device

on a board suitable for use in an MR16 lamp.

The board has four main connections: two power inputs P1 and P2, and two LED connections Anode (A) and

Cathode (C).

The evaluation board is preset to drive 680mA into a single LED.

The operating voltage is nominally 12VAC or DC. The 33uH inductor used in the circuit is based on

this nominal supply, which should be connected across the P1 and P2 pins.

Note: The input bridge rectifier provides the board with reverse battery protection.

The nominal current, 680mA, is set with the 0R15 sense resistor, R1.

The CTRL Terminal is not used in this application.

Warning: At 12V nominal operation with 680mA output, the LED will be hot and very bright

Figure 1:

Figure 2:

12-20VDC

12VAC