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LM3444MAX Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce LM3444MAX
Description  AC-DC Offline LED Driver
Download  30 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

LM3444MAX Fiches technique(HTML) 1 Page - Texas Instruments

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ICOLL
V+
VAC
+
+
1
2
3
4
5
6
7
8
9
1
0
-
VLED
G
N
D
VC
C
FILT
ER
NC
NC
ISN
S
GAT
E
NC
CO
FF
N
C
LM344
4
VLED-
D
3
C
7
C
9
C
1
0
D
4
D
8
D
9
R
2
D
1
Q
1
C
5
C
1
2
D2
D1
0
Q2
L
2
Q3
R
3
R
4
C
1
1
C
4
U1
VBUCK
BR1
LINE VOLTAGE (VAC)
95.0
90.0
85.0
80.0
75.0
80
90
100
110
120
130
140
14 Series connected LEDs
10 Series connected LEDs
LM3444
www.ti.com
SNVS682C – NOVEMBER 2010 – REVISED MAY 2013
AC-DC Offline LED Driver
Check for Samples: LM3444
1
FEATURES
DESCRIPTION
The LM3444 is an adaptive constant off-time AC/DC
2
Application Voltage Range 80VAC – 277VAC
buck (step-down) constant current controller that
Capable of Controlling LED Currents Greater
provides a constant current for illuminating high
than 1A
power LEDs. The high frequency capable architecture
Adjustable Switching Frequency
allows the use of small external passive components.
A passive PFC circuit ensures good power factor by
Low Quiescent Current
drawing current directly from the line for most of the
Adaptive Programmable Off-time Allows for
cycle, and provides a constant positive voltage to the
Constant Ripple Current
buck regulator. Additional features include thermal
Thermal Shutdown
shutdown,
current
limit
and
VCC under-voltage
lockout. The LM3444 is available in a low profile 10-
No 120Hz Flicker
pin VSSOP package or an 8-lead SOIC package.
Low Profile 10-Pin VSSOP Package or 8-Lead
SOIC Package
Patent Pending Drive Architecture
APPLICATIONS
Solid State Lighting
Industrial and Commercial Lighting
Residential Lighting
TYPICAL LM3444 LED DRIVER 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.
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.


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