XL3003 datasheet(1/14 Pages) ETC2

Il numero della parte	XL3003

Spiegazioni elettronici	4A 220KHz 36V Buck LED Constant Current Driver

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XLSEMI

Datasheet

4A 220KHz 36V Buck LED Constant Current Driver

XL3003

Rev 1.2

www.xlsemi.com

1

Features

n Wide 8V to 36V Input Voltage Range

n Output Current Sence Voltage is 0.21V

n Maximum Duty Cycle 100%

n Minimum Drop Out 0.3V

n Fixed 220KHz Switching Frequency

n 4A Constant Output Current Capability

n Internal Optimize Power MOSFET

n High efficiency

n Excellent line and load regulation

n Built in thermal shutdown function

n Built in current limit function

n Built in output short protection function

n Available in TO-252 package

Applications

n Buck constant current driver

n Monitor LED Backlighting

n General purpose LED lighting

General Description

The XL3003 is a 220 KHz fixed frequency

PWM buck (step-down) LED constant current

driver, capable of driving a 4A load with high

efficiency, low ripple and excellent line and

load regulation. Requiring a minimum

number of external components, the regulator

is simple to use and include internal

frequency

compensation

and

a

fixed-frequency oscillator.

The PWM control circuit is able to adjust the

duty ratio linearly from 0 to 100%. An over

current protection function is built inside.

When short protection function happens, the

operation frequency will be reduced from

220KHz to 60KHz. An internal compensation

block is built in to minimize external

component count.

Figure1. Package Type of XL3003

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