AAT3193IJQ-3 datasheet(1/18 Pages) ANALOGICTECH

Part #	AAT3193IJQ-3

Description	3-Channel Charge-Pump LED Driver

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Manufacturer	ANALOGICTECH [Advanced Analogic Technologies]

Direct Link	http://www.analogictech.com

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AAT3193

3-Channel Charge-Pump LED Driver

ChargePumpTM

PRODUCT DATASHEET

3193.2008.07.1.3

1

www .analogictech.com

General Description

The AAT3193 is a charge-pump based, current-sink

white LED driver capable of driving one to three LEDs up

to 30mA, each. It automatically switches between 1x

mode and 2x mode to maintain the highest efficiency

and optimal LED current accuracy and matching.

The AAT3193 charge pump’s 1x mode (bypass mode)

has very low resistance allowing LED current regulation

to be maintained with input supply voltage approaching

the LED forward voltage.

The AAT3193 is available in a 2x2mm, 10-lead SC70JW-10

package.

Features

• Drives up to 3 LEDs at up to 30mA, each

• Automatic Switching Between 1x and 2x Modes

• 0.9MHz Switching Frequency

• Linear LED Output Current Control

▪ Single-wire, S2Cwire Interface

• AAT3193-1: 16-step

• AAT3193-2: 8-step

• AAT3193-3: 4-step

▪ ON/OFF or PWM Interface

• AAT3193-4

• ±10% LED Output Current Accuracy

• ±3% LED Output Current Matching

• Low-Current Shutdown Mode

• Built-in Thermal Protection

• Automatic Soft-Start

• Available in 2x2mm SC70JW-10 Package

Applications

• Entry Level Cordless Phone Handsets

• Entry Level Digital Cameras

• Entry Level Mobile Phone Handsets

• Entry Level MP3 and PMP Players

Typical Application

Input Voltage

2.7V to 5.5V

EN/SET

S2Cwire

Interface

IN

C+

C-

EN/SET

OUT

D1

D2

D3

RSET

14.3k

Ω

COUT

1μF

GND

WLEDs

OSRAM LW M 678

or equivalent

AAT3193-1

CP

1μF

CIN

1μF

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