AAT3128_08 ANALOGICTECH [Advanced Analogic Technologies], AAT3128_08 Datasheet

AAT3128_08

Manufacturer Part Number

AAT3128_08

Description

RGB LED Fashion Lighting Controller

Manufacturer

ANALOGICTECH [Advanced Analogic Technologies]

Datasheet

1.AAT3128_08.pdf (12 pages)

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General Description

The AAT3128 is a total solution controller for RGB LED

fashion lighting. A simplified control scheme greatly reduc-

es design complexity and accelerates time to market.

The AAT3128 contains a high efficiency tri-mode charge

pump DC/DC converter with 1X, 1.5X and 2X modes for

color LED applications. Current source outputs drive two

individual RGB LEDs for color displays, fashion and mood

lighting. With a single-wire S

LED module is easily controlled to display four distinct

lighting mood effects.

Low external parts count (two 1μF flying capacitors and

two small bypass capacitors) and high conversion effi-

ciency make the AAT3128 ideally suited for small bat-

tery-powered portable applications.

The AAT3128 has a thermal management system to pro-

tect the device in the event of an output short circuit

condition. Built-in soft-start circuitry prevents excessive

inrush current during start-up. A low current shutdown

feature disconnects the load from the input source and

reduces quiescent current to less than 1μA.

The AAT3128 is available in a 14-pin TSOPJW package.

Typical Application

ChargePump

3128.2008.02.1.1

BATTERY

1μF

EN/SET

Cwire interface, an RGB

38.3kΩ

SET

1μF

OUT

EN/SET

RSET

AAT3128

w w w . a n a l o g i c t e c h . c o m

GND

ISRC2

ISRC1

C1+

C2+

C1-

C2-

Features

• 2.7V to 5.5V Input Voltage Range

• Compatible with Common Anode RGB LEDs

• Four S

• 0~60mA Programmable Current Source

• Low Noise Constant Frequency Operation

• No Inductors

• Small Application Circuit

• Regulated Output Current

• Integrated LED Control Switches

• Automatic Soft-Start

• Less than 1μA Shutdown Current

Applications

• Color Backlighting for Monochrome LCD Displays

• Color Display Lighting

• Fashion Lighting RGB LEDs

• Mobile Handsets

• MP3 Players

• PDAs

• Smart Phones

1μF

RGB LED Fashion Lighting Controller

Cwire Controlled Lighting Moods

PRODUCT DATASHEET

LED 1

RGB

AAT3128

LED 2

RGB

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