Datasheet > EC4501NNB3R

EC4501NNB3R

更新时间： 2024-01-30 23:39:10

品牌	Logo	应用领域
飞虹 - E-CMOS		/
页数	文件大小	规格书
10页	776K
描述
White LED Set-up Converter

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EC4501NNB3R 数据手册

White LED Set-up Converter

EC4501

General Description

Features

The EC4501 is a step‐up DC/DC converter designed for driving up to 5

●

Drives Up to 5 Series White LEDs from 3V

white LEDs in series from a single cell Lithium Ion battery with

constant current. Because it directly regulates output current, the

EC4501 is ideal for driving light emitting diodes(LEDs)

whose light intensity is proportional to the current passing thro

ugh them, not the voltage across their terminals. A single external re

sistor sets LED current between 2mA and 20mA, which can

then be easily adjusted using either a DC voltage or a pulse

width modulated (PWM) signal up to 100KHz.Its low 104mV

feedback voltage reduces power loss and improves efficiency.

The OV pin monitors the output voltage and turns off the

●

Up to 87% Efficiency

●

1.25MHz Fixed Switching Frequency

Low 104mV Feedback Voltage

Open Load Shutdown

PWM Dimming

SOT23

‐6 Packages

RoHS compliant

converter if an over‐voltage condition is present due to an open

circuit condition. The EC4501 is available in SOT23

packages.

‐6

Applications

●

Cell Phones

Handheld Computers and PDAs

Digital Cameras

Small LCD Displays

E-CMOS Corp. (www.ecmos.com.tw)

Page 1 of 10

3F27N-Rev.P001

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