Texas Instruments LM3549 Evaluation Board LM3549SQEV/NOPB LM3549SQEV/NOPB Datenbogen
Produktcode
LM3549SQEV/NOPB
LM3549
CONTROL
LOGIC
R_OUT
G_OUT
B_OUT
R_EN
G_EN
B_EN
SDA
EN
SCL
VDD
GND
V
IN
2.7V to 5.5V
L1
L2
RED LED
GREEN LED
BLUE LED
C
IN
10
P
F
C
OUT
4.7
P
F
L1 2.2
P
H
VOUT
PWM
FAULT
SNVS640A – AUGUST 2010 – REVISED MAY 2013
LM3549 High Power Sequential LED Driver
Check for Samples:
1
FEATURES
DESCRIPTION
The LM3549 is a high power LED driver with up to
2
•
Over-Current Protection
700mA output current. It has three constant current
•
Over-Temperature Protection
LED drivers and a buck boost SMPS for driving RGB
•
I
2
C Compatible Interface
LEDs with high efficiency. LED drivers are designed
for sequential drive so only one driver can be enabled
for sequential drive so only one driver can be enabled
•
Under-Voltage Lockout
at a time.
•
LED Open and Short Protection and Detection
LED driver output current settings can be stored to
•
95% Peak Efficiency Buck-Boost Converter
integrated non-volatile memory which allows stand-
•
NVM Memory for Calibration Data and
alone operation without I
2
C interface. Non-volatile
Standalone Usage without I
2
C Control
memory is rewritable so current setting can be
•
Soft Start
changed if needed.
The LM3549 has a fault detection feature that can
APPLICATIONS
detect several different fault conditions. In case of a
fault error flags are set and FAULT output sends
fault error flags are set and FAULT output sends
•
Portable Video Projectors
interrupt to control logic. Error flags can be read
•
High Power LED Driving
through I
2
C interface.
Total brightness can be controlled with PWM input or
KEY SPECIFICATIONS
with master fader register if I
2
C interface is used.
•
Integrated buck-boost Converter
•
Programmable LED Drivers
•
700 mA Maximum Drive Current
•
±6% Current Accuracy Over Temperature
•
24-pin WQFN Package
Figure 1. Typical Application Circuit
1
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.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.