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AAT3158ITP-T1

更新时间： 2024-01-28 07:34:46

品牌	Logo	应用领域
ANALOGICTECH		驱动程序和接口接口集成电路泵
页数	文件大小	规格书
11页	279K
描述
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

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技术参数
数据手册

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AAT3158ITP-T1 技术参数

生命周期：	Transferred	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.68
Is Samacsys：	N	Base Number Matches：	1

AAT3158ITP-T1 数据手册

AAT3158

High Efficiency 1X/1.5X/2X Charge Pump

for White LED Applications

™

ChargePump

General Description

Features

The AAT3158 is a low noise, constant frequency

charge pump DC/DC converter that uses a tri-

mode load switch (1X), fractional (1.5X), and dou-

bling (2X) conversion to maximize efficiency for

white LED applications. The AAT3158 is capable of

driving up to four LED channels at 20mA per chan-

nel from a 2.7V to 5.5V input. The current sinks

may be operated individually or in parallel for driv-

ing higher current LEDs. A low external parts count

(two 1µF flying capacitors and two small 1µF

capacitors at V_INand V_OUT) make this part ideally

suited for small, battery-powered applications.

•

V_INRange: 2.7V to 5.5V

Fully Programmable Current with Single Wire

— 16 Current Levels

— Four Low Current Settings Down to 50µA

Low I_Q(50µA) for Low Current Mode

Tri-Mode 1X, 1.5X, and 2X Charge Pump for

Maximum Efficiency and V_FCoverage

Drives Up to Four LED Channels

No Inductors, Low Noise Operation

1MHz Constant Switching Frequency

Small Application Circuit

Built-In Thermal Protection

Automatic Soft-Start

I_Q<1µA in Shutdown

2.85x3mm TSOPJW-12 Package

•

AnalogicTech's

S²Cwire™

(Simple

Serial

Control™) serial digital input is used to enable, dis-

able, and set current for each LED with 16 settings

down to 50µA. The low current mode supply cur-

rent can be as low as 50µA to save power.

Each output of the AAT3158 is equipped with built-

in protection for V_OUTshort circuit and auto disable

for load short-circuit conditions. Built-in soft-start

circuitry prevents excessive inrush current during

start-up. A low current shutdown feature discon-

nects the load from V_INand reduces quiescent cur-

rent to less than 1µA.

Applications

•

Color (RGB) Lighting

Programmable Current Sinks

White LED Backlighting

White Photo Flash for Digital Still Cameras

The AAT3158 is available in a Pb-free, space-saving

2.85x3.0mm TSOPJW-12 package.

Typical Application

C1+

C2+

C₁

1µF

C₂

1µF

C2-

C1-

VIN

VOUT

2.7V to 5.5V

C_IN

C_OUT

1µF

AAT3158

1µF

GND

EN/SET

3158.2006.02.1.0

12 3 4 5 6 7...11

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