Datasheet > AAT3122

AAT3122

更新时间： 2024-11-17 22:38:55

品牌	Logo	应用领域
ANALOGICTECH		泵
页数	文件大小	规格书
12页	320K
描述
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications

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AAT3122 数据手册

AAT3122

High Efficiency 1X/1.5X Fractional Charge

Pump for White LED Applications

™

ChargePump

General Description

Features

The AAT3122 is a low noise, constant frequency

charge pump DC/DC converter that uses a dual

mode Load Switch (1X) and fractional (1.5X) con-

version to increase efficiency in White LED appli-

cations. With input voltages ranging from 2.7-5.5

Volts, the device can produce an output current of

up to 120mA. A low external parts count (two 1µF

flying capacitors and two small bypass capacitors

at V_INand OUT) makes the AAT3122 ideally suited

for small battery-powered applications.

•

V_INRange: 2.7V to 5.5V

<1µA of Shutdown Current

1 MHz Switching Frequency

Dual Mode 1x and 1.5x Charge Pump for

Maximum Efficiency

•

Only 4 External components

Simple Serial Control™ (S Cwire) Interface

Low Noise Constant Frequency Operation

33% Less Input Current Than Doubler Charge

Pumps

•

Small Application Circuit

Regulated Output Current

Automatic Soft-Start

AnalogicTech™'s Simple Serial Control™

(S Cwire™) interface is used to enable, disable

and set the LED drive current with a 32 level loga-

rithmic scale LED brightness control. The AAT3122

has a thermal management system to protect the

device in the event of a short circuit condition on

any of the output pins. Built-in soft-start circuitry

prevents excessive inrush current during start-up.

High switching frequency enables the use of small

external capacitors. A low shutdown current feature

disconnects the load from V_INand reduces quies-

cent current to less than 1µA. The AAT3122 pro-

vides a single current source output that can be

used to drive up to 6 LEDs at 20mA each. The

AAT3122 is available in a TSOPJW-12 package.

No Inductors

TSOPJW-12 Package

-40 to +85C° Temperature Range

Applications

•

White LED Backlighting

Programmable Current Source

Typical Application

C1+

AAT3122

1µF

C1-

C2+

V_OUT

C_IN

1µF

C_OUT

1µF

V_BATTERY

C2-

EN/SET

GND

3122.2004.08.1.2

12 3 4 5 6 7...12

中文翻译

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与AAT3122相关器件

型号	品牌	获取价格	描述	数据表
AAT3122_05	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3122ITP-T1	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3122ITP-T1	AAT	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3123	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3123_08	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3123A	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3123AITP-20-T1	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3123ITP-20-T1	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3124	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
AAT3124ISN-20-T1	ANALOGICTECH	获取价格	High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications

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