AL8808EV1

Issue 1 – January 2013

www.diodes.com

© Diodes Incorporated 2013

2

AL8808 DEVICE DESCRIPTION

The AL8808 is a continuous mode inductive driver in a TSOT25 package, for driving one or more

series-connected LEDs efficiently from a voltage source higher than the LED voltage. The device

includes the output switch and a current sense circuit, which requires an external sense resistor to set

the nominal current up to 1000mA.

AL8808 DEVICE FEATURES

•

Drives one or more series-connected LEDs

•

LEDs up to 1000mA.

•

Internal 30V switch.

•

Wide input voltage: 6V to 30V.

•

Inherent open circuit LED protection.

•

Built in over temperature protection.

•

Brightness control using DC or PWM.

DEVICE APPLICATIONS

•

LED flashlights.

•

High Power LED driving.

•

Low-voltage halogen replacement LEDs.

•

Automotive lighting.

•

Illuminated signs.

AL8808 Device Package, Pin and Definitions

TSOT25 package

Pin Definition

Name

Pin No

Description

SW

1

Drain of NDMOS switch.

GND

2

Ground (0V).

CTRL

3

Internal voltage ref. pin (5V) :

•

Leave floating for normal operation.

•

Connect to GND to turn off output current.

•

Drive with DC voltage (0.4V to 2.5V) or with PWM (up to 5V

logic level) signal to adjust output current.

SET

4

Connect a sense resistor, R1, from the SET pin to VIN to sense the

VIN

5

Input voltage: 6V to 30V. Decouple to ground with a 2.2uF or higher

ceramic capacitor.

ORDERING INFORMATION

EVALBOARD ORDER NUMBER

AL8808EV1

DEVICE ORDER NUMBER

AL8808WT-7

NOTE: Evaluation boards are subject to availability and qualified sales leads.