Datasheet > AAT2807AIXN-4.5-T1

AAT2807AIXN-4.5-T1

更新时间： 2024-01-11 02:22:06

品牌	Logo	应用领域
思佳讯 - SKYWORKS		/
页数	文件大小	规格书
12页	291K
描述
Analog Circuit,

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AAT2807AIXN-4.5-T1 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	,	Reach Compliance Code：	unknown
风险等级：	5.57	湿度敏感等级：	1
Base Number Matches：	1

AAT2807AIXN-4.5-T1 数据手册

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AAT2807A

Dual High Efficiency Charge Pump

for White LED and Flash Applications

™

ChargePump

General Description

Features

The AAT2807A is a member of AnalogicTech's Total

Power Management IC™ product family. It is a dual

charge pump designed to support both white LED

backlight and flash applications for systems operat-

ing with Lithium-Ion batteries. The backlight charge

pump is capable of driving up to three LEDs at a

total of 60mA. The current sinks may be operated

individually or in parallel for driving higher current

LEDs. To maximize power efficiency, the charge

pump operates in 1X, 1.5X, or 2X mode, where the

mode of operation is automatically selected by

comparing the forward voltage of each LED with the

input voltage. AnalogicTech's S²Cwire™ (Simple

Serial Control™) serial digital input is used to

enable, disable, and set current for each LED with

eight settings. The charge pump consumes

extremely low current internally (80µA typical) at

light load for optimized efficiency.

•

V_INRange: 2.7V to 5.5V

Dual Charge Pump to Support Backlight and

Flash LEDs

•

Backlight Charge Pump:

•

Regulated Current

Three Current Sink Inputs

Brightness Control via Single GPIO

Tri-Mode Charge Pump

20mA of Current Per Input Current Sink

•

Flash Charge Pump:

•

Regulated Output Voltage

300mA of Pulsed Current

•

Independent Enable Pins

Low Noise Constant Frequency Operation

1MHz Switching Frequency

Automatic Soft Start

No Inductors

Available in DFN44-16 Package

The flash charge pump is a charge pump doubler

with a regulated output voltage. It is designed to

deliver 150mA of continuous current and up to

300mA of pulsed current. It has an independent

enable pin for improved power savings.

Applications

•

Color (RGB) Lighting

White LED Backlighting

White LED Photo Flash

Built-in soft-start circuitry prevents excessive inrush

current during start-up. In shutdown mode, the

device disconnects the load from V_INand con-

sumes less than 1µA.

The AAT2807A is available in a space-saving, ther-

mally-enhanced 16-pin 4x4mm DFN package and

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

Typical Application

1µF

C1+ C1- C2+ C2- C3+ C3-

V_{OUT_FL}

V_{OUT_FLASH}

C_OUT

Flash

V_IN

1µF

AAT2807A

C_IN

1µF

V_IN

Backlight

V_{OUT_BL}

EN/SET

EN_FLSH

C_OUT

1µF

EN_FLSH

GND

2807A.2004.12.1.0

12 3 4 5 6 7...12

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