Datasheet > AAT3105

AAT3105

更新时间： 2022-12-20 01:13:01

品牌	Logo	应用领域
ANALOGICTECH		驱动器泵
页数	文件大小	规格书
15页	1913K
描述
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver

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AAT3105 数据手册

PRODUCT DATASHEET

AAT3105178

ChargePump

Low Cost 1x/2x 4 Channel Charge Pump WLED Driver

General Description

Features

•

The AAT3105 is a charge-pump based, current-source

white LED driver capable of driving one to four LEDs up

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

mode and 2x mode to maintain the highest efficiency

and optimal LED current matching.

Drives up to 4 LEDs at up to 30mA each

Automatic Switching Between 1x and 2x Modes

0.85MHz Switching Frequency

Linear LED Output Current Control

Universal PWM Interface

±10% LED Output Current Accuracy

±3% LED Output Current Matching

Low-current Shutdown Mode

The AAT3105 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.

Built-in Thermal Protection

Automatic Soft-start

Available in 2x2mm SC70JW-10 Package

LED brightness is controlled using a universal PWM inter-

face. The AAT3105 is available in a Pb-free, 2x2mm

10-lead SC70JW-10 package

Applications

•

Cell Phones

Digital Still Cameras

MP3 Players

Personal Data Assistants (PDAs)

Typical Application

OUT

C_OUT

1µF

C+

C_IN

1µF

AAT3105

C_P

1µF

C-

EN/PWM

Interface

EN/PWM

GND

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

3105.2008.10.1.0

12 3 4 5 6 7...15

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