Datasheet > AAT3172

AAT3172

更新时间： 2024-09-17 00:00:47

品牌	Logo	应用领域
ANALOGICTECH		驱动器闪光灯泵
页数	文件大小	规格书
15页	346K
描述
High Current LED Flash Driver Charge Pump IC

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AAT3172 数据手册

AAT3172

High Current LED Flash Driver Charge Pump IC

™

ChargePump

General Description

Features

The AAT3172 is a high output current, high effi-

ciency, low noise, low profile charge pump DC/DC

converter, ideal for multi-function LED photo-flash

applications where solution cost, size, and efficien-

cy are critical.

•

V_INRange: 2.7V to 5.5V

600mA Peak Output Current

Tri-Mode 1X/1.5X/2X in Current Mode

Voltage Mode Operation: 1.5X, 100mA

Dual Regulated Current Sinks

Current Match Between Current Sinks

32 Current Steps Set by AS²Cwire

1µF Input, Output, and Flying Capacitors

<1.0µA of Shutdown

Small Application Circuit

No Inductors

Automatic Soft Start

12-Pin TDFN 3x3 Package

-40°C to +85°C Temperature Range

The dual charge pump in the AAT3172 is capable

of delivering 600mA peak output current. Two cur-

rent-controlled paths are available for users of dual

flash LEDs that prefer current matching. Each LED

channel can be easily programmed in 32 steps with

a single GPIO output through the AS²Cwire™

(Advanced Simple Serial Control™) interface. This

allows smooth transitions and flexible adjustment

of brightness in flash or other lighting modes.

The tri-mode (1X/1.5X/2X) operation of the internal

charge pump offers excellent power efficiency for

both flash and movie modes. Combined with a low

external parts count (two 1µF flying capacitors and

one small bypass capacitor at V_INand OUT), the

AAT3172 is ideally suited for small, battery-powered

applications.

Applications

•

Camera Phones

Digital Still Cameras (DSCs)

PDAs and Notebook PCs

Smart Phones

The AAT3172 has a thermal management system to

protect the device in the event of a short-circuit con-

dition at the output pin. Built-in soft-start circuitry

prevents excessive inrush current during start-up.

The shutdown feature disconnects the load from V_IN

and reduces quiescent current to less than 1.0µA.

The AAT3172 is available in the Pb-free, thermally-

enhanced, 12-pin 3x3 TDFN package.

Typical Application

1µF

C1+

V_IN

C1- C2+

C2-

2.7V to 5.5V

V_OUT

Flash

LED 1

Flash

LED 2

C_IN

4.7µF

C_OUT

2.2µF

AAT3172

EN/SET

GND

3172.2005.11.1.1

12 3 4 5 6 7...15

中文翻译

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与AAT3172相关器件

型号	品牌	获取价格	描述	数据表
AAT3172_08	ANALOGICTECH	获取价格	High Current LED Flash Driver Charge Pump IC
AAT3172IWP-T1	AAT	获取价格	High Current LED Flash Driver Charge Pump IC
AAT3172IWP-T1	ANALOGICTECH	获取价格	High Current LED Flash Driver Charge Pump IC
AAT3174	ANALOGICTECH	获取价格	High Current, High Efficiency Charge Pump
AAT3174IWP-T1	ANALOGICTECH	获取价格	High Current, High Efficiency Charge Pump
AAT3175	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X/2X Charge Pump For White LED Flash Applications
AAT3175IWP-T1	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X/2X Charge Pump For White LED Flash Applications
AAT3176AIDH-T1	SKYWORKS	获取价格	LED Driver
AAT3176IDH-T1	ANALOGICTECH	获取价格	Interface Circuit
AAT3177	ANALOGICTECH	获取价格	High Current, High Efficiency Charge Pump with Auto-Timer

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