Diodes AL8807A Manuel d'utilisateur télécharger pdf

AL8807A

Document number: DS35990 Rev. 2 - 2

1 of 20

www.diodes.com

March 2013

L8807A

HIGH EFFICIENCY LOW EMI WIDE ANALOG

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

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 V

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)

Pin Assignments

(Top View)

SOT25

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

(Top View)

MSOP-8EP

SET

GND

CTRL

N/C

1 2 3 4 5 6 ... 19 20

Résumé du contenu

Page 1 - (Top View)

AL8807A Document number: DS35990 Rev. 2 - 2 1 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807AHIGH EFFICIENCY LOW EMI WIDE ANALOG DIMMI

Page 2

AL8807A Document number: DS35990 Rev. 2 - 2 10 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information AL8807A Opera

Page 3

AL8807A Document number: DS35990 Rev. 2 - 2 11 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) Analog

Page 4

AL8807A Document number: DS35990 Rev. 2 - 2 12 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) Soft S

Page 5

AL8807A Document number: DS35990 Rev. 2 - 2 13 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) Input

Page 6

AL8807A Document number: DS35990 Rev. 2 - 2 14 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) The ind

Page 7

AL8807A Document number: DS35990 Rev. 2 - 2 15 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) EMI an

Page 8

AL8807A Document number: DS35990 Rev. 2 - 2 16 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Application Information (cont.) Fault

Page 9

AL8807A Document number: DS35990 Rev. 2 - 2 17 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Ordering Information Part Number S

Page 10 - Application Information

AL8807A Document number: DS35990 Rev. 2 - 2 18 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Package Outline Dimensions (All dimens

Page 11

AL8807A Document number: DS35990 Rev. 2 - 2 19 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Suggested Pad Layout Please see AP020

Page 12

AL8807A Document number: DS35990 Rev. 2 - 2 2 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Pin Descriptions Pin Name Pin Number F

Page 13

AL8807A Document number: DS35990 Rev. 2 - 2 20 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A IMPORTANT NOTICE DIODES INCORPORATE

Page 14 - AL8807A

AL8807A Document number: DS35990 Rev. 2 - 2 3 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Absolute Maximum Ratings (@TA = +25°C,

Page 15

AL8807A Document number: DS35990 Rev. 2 - 2 4 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Electrical Characteristics (@TA = +25°C

Page 16

AL8807A Document number: DS35990 Rev. 2 - 2 5 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Typical Performance Characteristics (@T

AL8807A Document number: DS35990 Rev. 2 - 2 6 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Typical Performance Characteristics (co

Page 18

AL8807A Document number: DS35990 Rev. 2 - 2 7 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Typical Performance Characteristics (con

Page 19

AL8807A Document number: DS35990 Rev. 2 - 2 8 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Typical Performance Characteristics (670

Page 20

AL8807A Document number: DS35990 Rev. 2 - 2 9 of 20 www.diodes.com March 2013© Diodes Incorporated AL8807A Typical Performance Characteristics (1A

Commentaires sur ces manuels

Pas de commentaire

Diodes AL8807A Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Diodes AL8807A. Diodes AL8807A User Manual Manuel d'utilisatio

Résumé du contenu

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Diodes AL8807A