Texas Instruments LM3444 Evaluation Boards LM3444-230VFLBK/NOPB LM3444-230VFLBK/NOPB 数据表
产品代码
LM3444-230VFLBK/NOPB
I
COLL
V+
VAC
+
+
1
2
3
4
5
6
7
8
9
1
0
0
-
V
LED
G
N
D
N
D
VC
C
FILT
ER
NC
NC
ISN
S
GAT
E
NC
CO
FF
N
C
C
LM344
4
V
LED-
D
3
3
C
7
C
9
C
1
0
0
D
4
D
8
D
9
R
2
D
1
Q
1
C
5
C
1
2
2
D2
D1
0
Q2
L
2
2
Q3
R
3
R
4
C
1
1
1
C
4
U1
V
BUCK
BR1
LINE VOLTAGE (V
AC
)
EF
F
IC
IEN
C
Y
(%
)
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
SNVS682C – NOVEMBER 2010 – REVISED MAY 2013
AC-DC Offline LED Driver
Check for Samples:
1
FEATURES
DESCRIPTION
The LM3444 is an adaptive constant off-time AC/DC
2
•
Application Voltage Range 80V
AC
– 277V
AC
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
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
V
CC
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
SOIC Package
•
Patent Pending Drive Architecture
APPLICATIONS
•
Solid State Lighting
•
Industrial and Commercial Lighting
•
Residential Lighting
TYPICAL LM3444 LED DRIVER APPLICATION CIRCUIT
1
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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.