Datasheet > AL3159

AL3159

更新时间： 2024-11-09 08:24:23

品牌	Logo	应用领域
美台 - DIODES		功效泵
页数	文件大小	规格书
10页	377K
描述
HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS

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AL3159 数据手册

AL3159

HIGH EFFICIENCY 1x/2x CHARGE PUMP

FOR WHITE LED APPLICATIONS

Description

Pin Assignments

The AL3159 is a low noise, constant frequency charge pump

DC/DC converter that uses a Dual mode load switch (1x), and (2x)

conversion for white LED applications. The AL3159 is capable of

driving nine LED channels at 20mA from a 2.7V to 5.5V input. The

current sinks may be operated using three simple logic control

inputs individually or in parallel for driving higher-current LEDs. Low

external part counts (one 1µF flying capacitor and two

2.2µF capacitors at V_INand V_OUT) make this part ideally suited for

small, battery-powered applications.

AL3159 digital inputs are used to enable or disable the

LED channels with a fixed default current settings at 20mA or other

factory programming options available.

Each output of the AL3159 is equipped with built-in protection for

_OUTshort circuit and auto-disable for LED short conditions. Built-in

soft-start circuitry prevents excessive inrush current during start-up

and mode switching. A low-current shutdown feature disconnects

the load from V_INto reduce quiescent current less than 1µA.

The AL3159 is available in a lead-free, space-saving, thermally

enhanced 20-pin 3 x 3mm QFN package.

Applications

Features

•

Mobile Phone White LED Backlighting and Indicators

PDA White LED backlighting

Battery-operated Phone Main and Sub Screen White LED

Backlighting

•

V_INrange: 2.7V to 5.5V

Up to 93% Max Power Efficiency

1% Current Matching Accuracy Between Channels

Drives up to 9 configurable Channels of LEDs

Three simple logic decoding LED On/Off control inputs

Low transition threshold voltage typical 150 mV

Dual-Mode 1x and 2x Charge Pump

1.2 MHz Constant Switching Frequency

V_OUTshort circuit and Thermal Protections

Soft Start for reducing inrush current

I_Q<1µA in Shutdown

Thermally-Enhanced QFN3030-20 Package: Available in

“Green” Molding Compound (No Br, Sb)

•

Lead Free Finish/ RoHS Compliant (Note 1)

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html

Typical Application Circuit

1 of 10

www.diodes.com

January 2011

AL3159

Document number: DS35048 Rev. 2 - 2

12 3 4 5 6 7...10

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与AL3159相关器件

型号	品牌	获取价格	描述	数据表
AL3159_11	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159FSG	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159FSG-7	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL317CS	MOLEX	获取价格	Rectangular Connector Adapter, 31 Contacts(Side1), 31 Contacts(Side2), Panel Mount, Female
AL-317EGW	A-BRIGHT	获取价格	3mm Round LED Lamps
AL-319EGW-C	A-BRIGHT	获取价格	3mm Round LED Lamps
AL31N02	MOLEX	获取价格	D Microminiature Connector, 31 Contact(s), Male, Solder Terminal
AL31N03	MOLEX	获取价格	D Microminiature Connector, 31 Contact(s), Male, Solder Terminal
AL31N05	MOLEX	获取价格	D Microminiature Connector, 31 Contact(s), Male, Solder Terminal
AL31N06	MOLEX	获取价格	D Microminiature Connector, 31 Contact(s), Male, Solder Terminal

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