Datasheet > AL8808

AL8808

更新时间： 2022-06-20 18:07:12

品牌	Logo	应用领域
美台 - DIODES		驱动器
页数	文件大小	规格书
20页	3275K
描述
COST EFFECTIVE LOW EMI 30V 1A BUCK LED DRIVER

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AL8808 数据手册

AL8808

COST EFFECTIVE LOW EMI 30V 1A BUCK LED DRIVER

Description

Pin Assignments

(Top View)

The AL8808 is a step-down DC/DC converter designed to drive LEDs

with a constant current. The device can drive up to 8 LEDs,

depending on the forward voltage of the LEDs, in series from a

voltage source of 6V to 30V. Series connection of the LEDs provides

identical LED currents resulting in uniform brightness and eliminating

the need for ballast resistors. The AL8808 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.

SW 1

GND 2

CTRL 3

5 V_IN

4 SET

TSOT25

Maximum output current of AL8808 is set via an external resistor

connected between the V_INand SET input pins. Dimming is achieved

by applying either an analog DC voltage or a PWM signal at the

CTRL input pin. An input voltage of 0.4V or lower at CTRL switches

off the output MOSFET simplifying PWM dimming.

Features

•

LED Driving Current Up to 1A

Better Than 5% Accuracy

High Efficiency Up to 96%

Applications

Fast Controlled Falling Edges 7ns

Operating Input Voltage from 6V to 30V

High Switching Frequency Up to 1MHz

PWM/DC Input for Dimming Control

•

MR16 Lamps

General Illumination Lamps

Built-In Output Open-Circuit Protection

Built-In Over-Temperature Protection

TSOT25: Available in “Green” Molding Compound (No Br, Sb)

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

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

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

1 of 20

www.diodes.com

January 2013

AL8808

Document number: DS35648 Rev. 2 - 2

12 3 4 5 6 7...20

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