AL8807AMP-13 データシートの表示（PDF） - Diodes Incorporated.

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AL8807AMP-13

HIGH EFFICIENCY LOW EMI WIDE ANALOG DIMMING RANGE 36V 1A/1.3A BUCK LED DRIVER

Diodes Incorporated. 

Description

The AL8807A is a step-down DC/DC converter designed to drive

LEDs with a constant current. The device can drive up to 9 white high

brightness LEDs in series from a voltage source of 6V to 36V.

The AL8807A has an extended CTRL pin voltage range; increasing

its analog dimming range to greater than 10:1. The improved analog

dimming range makes it suitable for a variety of lighting applications

requiring wide analog dimming ranges.

The AL8807A switches at frequency up to 1MHz with controlled rise

and fall times to reduce EMI. This allows the use of small size

external components, hence minimizing the PCB area needed.

Maximum output current of AL8807A is set via an external resistor

connected between the VIN and SET input pins.

Over Temperature Protection is incorporated so that should a fault

occur the device will automatically shut-down and only restart when

its junction temperature has cooled down,

Features

 LED Driving Current up to 1A/1.3A

 Better than 5% Accuracy

 High Efficiency Up to 96%

 Optimally Controlled Switching Speeds

 Operating Input Voltage from 6V to 36V

 Wide Analog Input Range for Dimming Control (>10:1)

 Built-in Protection Features:

 Open-Circuit LED protection

 LED Chain Short Circuited

 Over-Temperature Protection

 MSOP-8EP and SOT25: Available in “Green” Molding Compound

(No Br, Sb) with lead Free Finish/ RoHS Compliant

 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

 Halogen and Antimony Free. “Green” Device (Note 3)

AL8807A

HIGH EFFICIENCY LOW EMI WIDE ANALOG

DIMMING RANGE 36V 1A/1.3A BUCK LED DRIVER

Pin Assignments

(Top View)

SOT25

(Top View)

SET 1

GND 2

GND 3

CTRL 4

8 VIN

7 N/C

6 SW

5 SW

MSOP-8EP

Applications



General Illumination Lamps



12V Powered LED Lamps



Wide Analog Dimming Range LED Lamps

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green" and Lead-Free.

3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)

and <1000ppm antimony compounds.

Typical Applications Circuit

AL8807A

Document number: DS35990 Rev. 2 - 2

1 of 20

www.diodes.com

March 2013

© Diodes Incorporated

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