Datasheet > AAT3171

AAT3171

更新时间： 2024-11-07 04:30:31

品牌	Logo	应用领域
ANALOGICTECH		泵
页数	文件大小	规格书
19页	389K
描述
High Current, High Efficiency Charge Pump with Auto-Timer

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中文翻译

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AAT3171 数据手册

AAT3171

High Current, High Efficiency

Charge Pump with Auto-Timer

™

ChargePump

General Description

Features

The AAT3171 is a high output current, high effi-

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

converter. The device is ideal for multi-functional

LED photo-flash applications where solution cost,

size, and efficiency are critical.

•

Up to 800mA Output Current

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

16 Current Level Steps Set by S²Cwire

External R_SETto Set Maximum Current

<1µA of Shutdown

Small Application Circuit

No Inductors

Automatic Soft Start

12-Pin TDFN 3x3mm Package

-40°C to +85°C Temperature Range

The AAT3171 is capable of driving a regulated out-

put current up to 800mA. Output current levels can

be easily programmed in 16 steps through

AnalogicTech's Simple Serial Control™ (S²Cwire™)

interface controlled by a single microcontroller

GPIO line. This allows smooth transitions and flexi-

ble adjustment of brightness in flash or other light-

ing modes. The maximum output current can also

be set with an external R_SETresistor.

Applications

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

charge pump offers excellent power efficiency

throughout the output current range for both flash

and movie modes. Combined with a low external

parts count (two 1µF flying capacitors and two small

bypass capacitors at V_INand OUT), the AAT3171 is

ideally suited for small battery-powered applications.

•

Camcorders

Camera Phones

Digital Still Cameras

PDAs and Notebook PCs

Smart Phones

The AAT3171 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 pre-

vents excessive inrush current during start-up. The

shutdown feature disconnects the load from V_INand

reduces quiescent current to less than 1µA.

The AAT3171 is available in a Pb-free, thermally-

enhanced 12-pin 3x3mm TDFN package and is spec-

ified over the -40°C to +85°C temperature range.

Typical Application

1µF

C1+

C1- C2+

C2+

2.7V

to 5.5V

OUT

VIN

C_IN

4.7µF

C_OUT

2.2µF

Flash

LED

AAT3171

EN/SET

RSET

GND

0.1µF

187K

3171.2007.03.1.1

12 3 4 5 6 7...19

中文翻译

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与AAT3171相关器件

型号	品牌	获取价格	描述	数据表
AAT3171IWP-T1	ANALOGICTECH	获取价格	High Current, High Efficiency Charge Pump with Auto-Timer
AAT3172	AAT	获取价格	High Current LED Flash Driver Charge Pump IC
AAT3172	ANALOGICTECH	获取价格	High Current LED Flash Driver Charge Pump IC
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

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