Datasheet > CMD15-21SRCTR8

CMD15-21SRCTR8

更新时间： 2024-09-24 01:21:31

品牌	Logo	应用领域
思佳讯 - SKYWORKS		/
页数	文件大小	规格书
17页	2053K
描述
1.5A Single Flash LED Driver IC

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CMD15-21SRCTR8 数据手册

DATA SHEET

AAT1274

1.5A Single Flash LED Driver IC

General Description

Features

•

The AAT1274 is a high-efficiency, 1.5A high-current

boost converter for LED photo flash applications. It

maintains output current regulation by switching the

internal high-side and low-side switch transistors, pulse-

width modulated at a fixed frequency of 2MHz. The high

switching frequency allows the use of a small external

inductor and output capacitor, making the AAT1274 ide-

ally suited in all single cell, Li-ion-powered applications.

Input Voltage Range: 2.7V to 5.5V

Single Channel Flash Output

Up to 1.5A Regulated Output Current

Up to 88% Efficiency

2 MHz Switching Frequency

Separate Flash Enable

Single Resistor Sets Flash and Movie Mode Current

AS²Cwire Single Wire Programming:

▪

•

Movie Mode Current

Skyworks' proprietary AS²Cwire™ (Advanced Simple

Serial Control™) serial digital interface is used to enable,

disable, configure, and program the operation of the

AAT1274. Using the AS²Cwire interface, the movie-mode

current level for each LED, and the flash-to-movie-mode

current ratio can be programmed to one of 16 levels. The

AAT1274 includes a separate Flash Enable input to initi-

ate the flash operation and a Flash Inhibit pin which

reduces the flash current to movie-mode levels during

high battery demand.

•

Flash/Movie Mode Current Ratio

•

True Load Disconnect

Soft-Start and Input Current Limit

Over-Voltage (Open LED, Open Circuit), Short Circuit,

and Over-Temperature Protection

-40°C to +85°C Temperature Range

TDFN33-14 Package

•

Applications

•

LED Photo Flash / Torch

The maximum flash and movie-mode current is set by

one external resistor where the ratio of flash to movie-

mode current is set at approximately 7.3:1. The AAT1274

can drive one high current LED.

Camera Enabled Mobile Devices

Cellphones/Smartphones

Digital Still Cameras (DSCs)

Multimedia Mobile Phones

The AAT1274 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 AAT1274 is available in a Pb-free, thermally-enhanced

TDFN33-14 package and operates over the -40°C to 85°C

temperature range.

Typical Application

L1 1μH

V_BAT= 2.7V to 5.5V

Enable/Set Input

OUT

C_OUT

C_IN

2.2μF

Flash LED

AAT1274

EN/SET

Flash Enable

Flash Inhibit

FLEN

RSET

R_SET

FLINH

PGND AGND FLGND

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

201981A

• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 21, 2012

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