Datasheet > AAT1282IWO-T1

AAT1282IWO-T1

更新时间： 2024-11-23 12:55:39

品牌	Logo	应用领域
思佳讯 - SKYWORKS		闪光灯驱动
页数	文件大小	规格书
22页	3589K
描述
2A Driver for High Intensity LED Camera Flash

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AAT1282IWO-T1 技术参数

是否Rohs认证：	符合	生命周期：	Active
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.75
接口集成电路类型：	LED DISPLAY DRIVER	Base Number Matches：	1

AAT1282IWO-T1 数据手册

DATA SHEET

AAT1282

2A Driver for High Intensity LED Camera Flash

General Description

Features

The AAT1282 is a high-efficiency, high-current step-up

converter capable of 2A maximum output current. It is

an ideal power solution for LED photo flash applications

in all single cell Li-ion powered products.

 V_INRange: 2.7V to 5.5V

 Dual Channel Output

Up to 2A Regulated Output Current

▪

 1A per channel

 Integrated Fixed Input Current Limit

The AAT1282 maintains output current regulation by

switching the internal high-side and low-side switch

transistors. The transistor switches are pulse-width

modulated at a fixed frequency of 2MHz. The high

switching frequency allows the use of a small inductor

and output capacitor, making the AAT1282 ideally suited

for small battery-powered applications. A high-capacity

Super Capacitor on the secondary side of the step-up

converter provides the high-peak flash LED current,

thereby reducing the peak current demand from the

Li-ion battery. To achieve this, the step-up converter

features a fixed, input current limiter.

800mA*

▪

Suited for Super Capacitor Applications

 Up to 80% Efficiency with Small Magnetics

 2MHz Switching Frequency

 Independent Flash Enable

 User-programmable Safety Timer

 Single Resistor Sets Flash and Movie-mode Current

 Two Wire, I²C Compliant Serial Interface:

Fast, 400kHz Serial Transfer Rate

▪

16 level Movie-mode Current

Flash/Movie-mode

Current Output Channel Control

Safety Timer

▪

An industry-standard I²C serial digital input is used to

enable, disable and set the movie-mode current for each

flash LED with up to 16 movie-mode settings. The

AAT1282 also includes a separate Flash Enable input to

initiate both the flash operation and the default timer

which can be used either to terminate a flash event at the

end of a user-programmed delay or as a safety feature.

• True Load Disconnect

• Supply Current in Shutdown: <1.0μA

• TDFN33-14 Package

Applications

• Camcorder Video Light (Torch Light)

• Camera Phones/Smartphones

• Digital Still Cameras (DSC)

• LED Photo Flash Light (Strobe Light)

• Mobile Handsets

The maximum flash and movie-mode current is set by

one external resistor where the ratio between Flash to

Movie-mode current is set at approximately 7.3:1. One or

two LEDs can be connected to the AAT1282, where in the

case of two LEDs the output current is matched between

each diode. The ratio of maximum flash current to movie-

mode current can also be adjusted via the I²C control.

The AAT1282 contains a thermal management system to

protect the device in the event of an output short-circuit

condition. Built-in circuitry prevents excessive inrush

current during start-up. The shutdown feature reduces

quiescent current to less than 1.0μA.

The AAT1282 is available in a Pb-free, thermally-

enhanced 14-pin 3 x 3mm TDFN package.

* Contact Sales for alternative current limits.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

202305C

• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013

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