LM3549

更新时间： 2024-11-14 11:34:59

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
8页	2821K
描述
Evaluation Kit high power LED driver with up to 700mA

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LM3549 数据手册

National Semiconductor

Application Note 2062

Anssi Raisanen

LM3549 Evaluation Kit

August 6, 2010

device. The evaluation board has a microcontroller that acts

as an USB to I²C interface. Microcontroller is also used to

manipulate the digital control signals of the LM3549. LM3549

evaluation board can be powered from the USB interface or

from external power supply. If evaluation board is used to

measure the electrical parameters of the LM3549 or used with

high output currents external powersupply needs to be used.

If evalution board is used to check the functionality of the

LM3549 with small output currents or to support software de-

velopment it can be powered directly from USB interface. This

document describes how to get the LM3549 evaluation board

up and running and how to use evaluation software.

General Description

The LM3549 is a high power LED driver with up to 700mA

output current. It has three constant current LED drivers and

a buck boost SMPS for driving RGB LEDs with high efficiency.

LED drivers are designed for sequential drive so only one

driver can be enabled at a time.

LED driver output current settings can be stored to integrated

non-volatile memory which allows stand-alone operation with-

out I²C interface. Non-volatile memory is rewritable so current

setting can be changed if needed.

LM3549 has a fault detection feature that can detect several

different fault conditions. In case of a fault error flags are set

and FAULT output sends interrupt to control logic. Error flags

can be read through I²C interface.

What Is Needed

To get started you will need:

Total brightness can be controlled with PWM input or with

master fader register if I²C interface is used.

•

LM3549 evaluation board

LM3549 evaluation software (LM3549.exe)

USB Cable

LM3549 Evaluation board is designed to help getting famil-

iarized with the LM3549. It can be used to measure key

parameters of the LM3549 and to speed up design in of the

PC with one free USB port

30125042

FIGURE 1.

301250

www.national.com

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与LM3549相关器件

型号	品牌	获取价格	描述	数据表
LM3549SQ	NSC	获取价格	IC LED DISPLAY DRIVER, QCC24, LLP-24, Display Driver
LM3549SQ/NOPB	TI	获取价格	高功率顺序驱动 LED 驱动器 \| RTW \| 24 \| -30 to 85
LM3549SQE	NSC	获取价格	IC LED DISPLAY DRIVER, QCC24, LLP-24, Display Driver
LM3549SQE/NOPB	TI	获取价格	高功率顺序驱动 LED 驱动器 \| RTW \| 24 \| -30 to 85
LM3549SQX	NSC	获取价格	IC LED DISPLAY DRIVER, QCC24, LLP-24, Display Driver
LM3549SQX/NOPB	TI	获取价格	高功率顺序驱动 LED 驱动器 \| RTW \| 24 \| -30 to 85
LM3550	TI	获取价格	5A Flash LED Driver with Automatic VLED and ESR Detection for Mobile Camera Systems
LM3550SP	TI	获取价格	5A Flash LED Driver with Automatic VLED and ESR Detection for Mobile Camera Systems
LM3550SP/NOPB	TI	获取价格	具有自动 Vf 和 ESR 检测功能的 LED 闪光灯驱动器，适用于移动摄像机系统 \| N
LM3550SPX	TI	获取价格	5A Flash LED Driver with Automatic VLED and ESR Detection for Mobile Camera Systems

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