AL8806

HIGH EFFICIENCY 30V 1.5A BUCK LED DRIVER

AL8806

Document number: DS35144 Rev. 2 - 2

11 of 15

www.diodes.com

June 2011

© Diodes Incorporated

PCB Layout

When laying out the PCB for the AL8806 the following should be observed:

1.

2.

3.

The anode of the freewheel diode (D1), the SW pin and the inductor have to be placed as close as possible to each

other to avoid ringing.

AL8806

C2

R

SET

C1

D1

L1

To avoid

radiated EMI

keep dashed

tracks as

short as

possible

Figure 6. PCB Layout

The AL8806 has two evaluation boards available on request (AL8806EV4 and AL8806EV6). Information can be found on the

Diodes website and from a Diodes’ sales representative.

Application Example

conventional electromagnetic transformers or electronic transformers.

As a replacement for MR16 halogen lamps, LED lamps offer a more energy efficient solution - radiating no heat and no Ultra

Violet light. The low thermal impedance of the AL8806 and its 1.5A switch capability allows it drive some of the latest multi-

die LEDs; which increases the lamp’s luminance.

This application example is intended to fit into the base connector space of an MR16 style LED lamp. The design has been

optimized for part count and thermal performance for a multi-die LED in the Lens section as well as EMI conformance.

Figure 7. MR16 Schematic