Datasheet > AP5725_10

AP5725_10

更新时间： 2022-12-20 05:06:17

品牌	Logo	应用领域
美台 - DIODES		转换器升压转换器
页数	文件大小	规格书
17页	295K
描述
WHITE LED STEP-UP CONVERTER

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AP5725_10 数据手册

AP5725

WHITE LED STEP-UP CONVERTER

Description

Pin Assignments

(Top View)

The AP5725 is a step-up DC/DC converter specifically

designed to drive white LEDs with a constant current. The

device can drive 2 ~ 6 LEDs in series from a Li-Ion cell.

Series connection of the LEDs provides identical LED

currents resulting in uniform brightness and eliminates the

need for ballast resistors. For driving higher number of LEDs,

VIN

(Top View)

GND

V_IN

GND

OVP

AP5725 also supports

a single feedback of parallel

OVP

connected multiple strings of equal number of LEDs.

SOT26 / TSOT23-6

DFN2020C-6

The AP5725 switches at 1.2MHz that allows the use of tiny

external components.

A low 0.25V feedback voltage

minimizes power loss in the current setting resistor for better

efficiency.

Features

Applications

•

High efficiency: 84% typical

•

Cellular Phones

PDAs, Hand held Computers

Digital Cameras

MP3 Players

GPS Receivers

Fast 1.2MHz switching frequency

Current limit and UVLO protections

Internal thermal shutdown

Internal Over Voltage Protection

Integrated soft-start function

SOT26, TSOT23-6 and DFN2020C-6: 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

22uH

V_IN

C_OUT

1uF

C_IN

1uF

V_IN

2~6 LEDs

OVP

AP5725

ON OFF

PWM Dimming

R^SET

GND

Figure 1. Typical Application Circuit

1 of 17

www.diodes.com

July 2010

AP5725

Document number: DS31844 Rev. 3 - 2

12 3 4 5 6 7...17

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