Datasheet > LM3549

LM3549

更新时间： 2024-11-15 11:11:15

品牌	Logo	应用领域
德州仪器 - TI		驱动驱动器
页数	文件大小	规格书
28页	1328K
描述
高功率顺序驱动 LED 驱动器

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LM3549 数据手册

LM3549

www.ti.com

SNVS640A –AUGUST 2010–REVISED MAY 2013

LM3549 High Power Sequential LED Driver

Check for Samples: LM3549

FEATURES

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.

•

Over-Current Protection

Over-Temperature Protection

I²C Compatible Interface

Under-Voltage Lockout

LED Open and Short Protection and Detection

95% Peak Efficiency Buck-Boost Converter

LED driver output current settings can be stored to

integrated non-volatile memory which allows stand-

alone operation without I²C interface. Non-volatile

memory is rewritable so current setting can be

changed if needed.

NVM Memory for Calibration Data and

Standalone Usage without I²C Control

•

Soft Start

The 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.

APPLICATIONS

•

Portable Video Projectors

High Power LED Driving

Total brightness can be controlled with PWM input or

with master fader register if I²C interface is used.

KEY SPECIFICATIONS

•

Integrated buck-boost Converter

Programmable LED Drivers

700 mA Maximum Drive Current

±6% Current Accuracy Over Temperature

24-pin WQFN Package

L1 2.2 mH

2.7V to 5.5V

VDD

VOUT

OUT

10 mF

4.7 mF

SDA

SCL

LM3549

R_OUT

G_OUT

B_OUT

RED LED

CONTROL

LOGIC

R_EN

G_EN

B_EN

PWM

GREEN LED

BLUE LED

FAULT

GND

Figure 1. Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...28

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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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