Datasheet > AL3158

AL3158

更新时间： 2024-09-16 06:36:55

品牌	Logo	应用领域
美台 - DIODES		功效泵
页数	文件大小	规格书
10页	360K
描述
HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS

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中文翻译

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AL3158 数据手册

AL3158

HIGH EFFICIENCY 1x/2x CHARGE PUMP

FOR WHITE LED APPLICATIONS

Description

Pin Assignments

The AL3158 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 AL3158 is capable of

driving three groups of three LED channels at 20mA from a 2.7V to

5.5V input. The current sinks may be operated using three simple

PWM dimming 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.

AL3158 PWM dimming inputs are used to enable, disable device

and dimming LED current with a fixed default current settings at

20mA or other factory programming options available.

Each output of the AL3158 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 AL3158 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

Three simple PWM dimming for RGB or WLED

Low transition threshold voltage typical 150 mV

Dual-Mode 1x and 2x Charge Pump

Drives up to 3 + 3 + 3 Channels of LEDs

1.2 MHz Constant Switching Frequency

V_OUTshort circuit and Thermal Protections

Soft Start for reducing inrush current

Under Voltage Lockout Protection

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

V_IN

C_P

1uF

C₁

2.2uF

C_IN

EN3

EN1

EN2

C_N

AL3158

V_OUT

2.2uF

C_OUT

LED

EN1

EN2

EN3

EN2

EN3

PGND

GND

1 of 10

www.diodes.com

September 2010

AL3158

Document number: DS35047 Rev. 1 - 2

12 3 4 5 6 7...10

中文翻译

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与AL3158相关器件

型号	品牌	获取价格	描述	数据表
AL3158_11	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3158FSG	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3158FSG-7	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159	DIODES	获取价格	HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
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

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