AL88070B

Document number: DS36191 Rev. 1 - 2

2 of 18

www.diodes.com

March 2014

© Diodes Incorporated

AL8807B

Pin Descriptions

Pin Name

Pin

Number

Function

SET

1

Set Nominal Output Current Pin. Configure the output current of the device.

GND

2, 3

GND Pins

CTRL

4

Dimming and On/Off Control Input.



Leave floating for normal operation.



Drive to voltage below 0.4V to turn off output current



A PWM signal (

 2.5V) allows the output current to be adjusted below the level set by the resistor

connected to SET input pin.

SW

5, 6

Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.

N/C

7

no connection

8

Input Supply Pin. Must be locally decoupled to GND with > 2.2µF X7R ceramic capacitor – see

applications section for more information.

EP

EP

Exposed pad/TAB connects to GND and thermal mass for enhanced thermal impedance. Should not be

used as electrical ground conduction path.

Functional Block Diagram