MPZ2012S300A datasheet(2/15 Pages) DIODES

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AL8806

Document number: DS35144 Rev. 5 - 2

2 of 15

www.diodes.com

July 2013

AL8806

Pin Descriptions

Name

Pin Number

Function

MSOP-8EP

5, 6

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

GND

2, 3

GND Pin

CTRL

Dimming and On/Off Control Input.

 Leave floating for normal operation.

(VCTRL = VREF = 2.5V giving nominal average output current IOUTnom = 0.1/RS)

 Drive to voltage below 0.4V to turn off output current

 Drive with DC voltage (0.5V < VCTRL < 2.5V) to adjust output current from 20% to 100% of IOUTnom

 A PWM signal (low level ≤ 0.4V and high level > 2.6; transition times less than 1us) allows the output current to be

adjusted below the level set by the resistor connected to SET input pin.

SET

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

VIN

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

more information.

Exposed pad:

Connect to GND and thermal mass for enhanced thermal impedance. It should not be used as electrical ground

conduction path.

N/C

no connection

Functional Block Diagram

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