Datasheet > RT4503

RT4503

更新时间： 2024-02-02 04:09:06

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立锜 - RICHTEK		/
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中文翻译

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技术参数
数据手册

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RT4503 技术参数

Status：	Active	Vin (min) (V)：	2.5
Vin (max) (V)：	5.5	Vout (max) (V)：	34
LED Channels：	1	Topology：	Boost
SW Freq (typ) (kHz)：	550	Vcs (typ) (mV)：
Dimming Control：	Analog	Features：
Package Type：	WDFN2x2-6

RT4503 数据手册

RT4503/A

Asynchronous Boost Converter for 10 WLEDs

General Description

Features

^2.5V to 5.5V Input Voltage Range

^36V Open LED Protection for 10 WLEDs

^Pulse Dimming Brightness Control

^200mV Reference Voltage with 2% Accuracy

^550kHz Switching Frequency

^Built-In Soft-Start

The RT4503/Ais a highly integrated LEDdriver IC capable

of driving 10 WLEDs in series. It is composed of a current

mode Boost converter integrated with a 36V/1.2A power

switch.

The RT4503/A supports a wide input voltage range from

2.5V to 5.5V and runs at a fixed frequency of 550kHz.

The LED current is set via an external resistor and the

feedback voltage is regulated to 200mV.

^Over-Temperature Protection

^Internal Compensation

^Current Limit

For brightness dimming, the RT4503A supports 32 steps

pulse dimming which determines the feedback reference

voltage, and RT4503 support PWM dimming which

determines the feedback reference voltage.

Ordering Information

RT4503/A

Package Type

QW : WDFN-6L 2x2 (W-Type)

Applications

 Cellular Phones

Lead Plating System

G : Green (Halogen Free and Pb Free)

 Digital Cameras

RT4503 : PWM Dimming

RT4503A : Pulse Dimming

Note :

 Probable Instruments

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

 Suitable for use in SnPb or Pb-free soldering processes.

Simplified Application Circuit

VIN

RT4503/A

GND

COMP*

* : COMP pin for RT4503 only.

is a registered trademark of Richtek Technology Corporation.

DS4503/A-03 June 2015

www.richtek.com

12 3 4 5 6 7...13

中文翻译

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与RT4503相关器件

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RT4503A	RICHTEK	获取价格	暂无描述
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RT4503GQW	RICHTEK	获取价格	Asynchronous Boost Converter for 10 WLEDs
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RT4531WSC	RICHTEK	获取价格	Dual Channel 10s2p WLED Drivers