Datasheet > AAT2806

AAT2806

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
AAT		泵
页数	文件大小	规格书
16页	578K
描述
Dual High Efficiency Charge Pump for White LED and Flash Applications

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AAT2806 数据手册

AAT2806

Dual High Efficiency Charge Pump

for White LED and Flash Applications

™

ChargePump

General Description

Features

The AAT2806 is a dual charge pump designed to

support both the white LED backlight and flash appli-

cations for systems operating with lithium-ion/poly-

mer batteries. The backlight charge pump is capable

of driving up to four LEDs at a total of 80mA. The cur-

rent 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 automati-

cally 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 an eight-level logarithmic scale plus

four low-current settings down to 50µA for optimized

efficiency, with a typical operating quiescent current

of less than 50µA.

•

V_INRange: 2.7V to 5.5V

Dual Charge Pump to Support Backlight and

Flash LEDs

Backlight Charge Pump:

— Regulated Current

— Four Current Sink Inputs

— S²Cwire Brightness Control

— Tri-Mode Charge Pump

— Maximum 20mA of Current Per Input

— Low I_Q(50µA) in Light Load Mode

Flash Charge Pump:

— Regulated Output Voltage

— Up to 250mA of Pulsed Current

Independent Backlight/Flash Control

Low Noise 1MHz Constant Frequency

Operation

•

Automatic Soft Start

No Inductors

Available in TDFN44-16 Package

The flash charge pump is a charge pump doubler

with a regulated output voltage. It is designed to

deliver 120mA of continuous current and up to

250mA of pulsed current. It has an independent

enable pin for improved power savings.

Applications

The AAT2806 has thermal protection and built-in

soft-start circuitry. A low-current shutdown feature

disconnects the load from V_INand reduces quiescent

current to less than 1µA.

•

Color (RGB) Lighting

White LED Backlighting

White LED Photo Flash

The AAT2806 is available in a Pb-free, space-saving,

thermally-enhanced TDFN44-16 package and is

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

Typical Application

1μF

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

VOUT_FL

V_{OUT_FLASH}

C_OUT

Flash

VIN

1μF

AAT2806

C_IN

Backlight

1μF

VOUT_BL

EN/SET

EN_FLSH

C_OUT

1μF

GND

2806.2006.04.1.8

12 3 4 5 6 7...16

下载PDF

与AAT2806相关器件

型号	品牌	描述	获取价格	数据表
AAT2806_07	ANALOGICTECH	Dual High Efficiency Charge Pump for White LED and Flash Applications	获取价格
AAT2806IXN-4.5-T1	AAT	Dual High Efficiency Charge Pump for White LED and Flash Applications	获取价格
AAT2806IXN-4.5-T1	ANALOGICTECH	Dual High Efficiency Charge Pump for White LED AND Flash Applications	获取价格
AAT2807AIXN-4.5-T1	SKYWORKS	Analog Circuit,	获取价格
AAT2807AIXN-4.5-T1	ANALOGICTECH	Analog Circuit,	获取价格
AAT2820	ANALOGICTECH	Triple-Output Charge Pump Regulator	获取价格