Texas Instruments LM3444 Buck-Boost Topology MR16 LED Bulb Reference Design LM3444MR16BBRB/NOPB LM3444MR16BBRB/NOPB Scheda Tecnica
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LM3444MR16BBRB/NOPB
LM3444-MR16-Boost Reference Design
NATIONAL SEMICONDUCTOR
Page 18 of 20
Performance with 8 LEDs
Performance without transformer
The table below compares the performance of each reference design when powered directly by a 12VAC source
Specs
LM3441 BOOST 8 LEDs
Units
V
IN
11.91
VAC
I
IN
0.682
A
P
IN
7.66
W
V
OUT
(1)
26.64
VDC
I
LED
(1)
0.238
A
P
OUT
(2)
6.34
W
Efficiency
82.8%
-
Power Factor
0.946
-
Performance with transformer
LET-75
Specs
LM3444 BOOST 8 LEDs
Units
V
IN
120
VAC
I
IN
0.067
A
P
IN
7.86
W
V
OUT
26.5
VDC
I
LED
0.230
A
P
OUT
6.10
W
Efficiency
77.5%
-
Power Factor
0.970
-
HATCH RS12-80M
Specs
LM3444 BOOST 8 LEDs
2 LEDs @ 1A
Units
V
IN
120
VAC
I
IN
0.069
A
P
IN
7.82
W
V
OUT
26.5
VDC
I
LED
0.230
A
P
OUT
6.10
W
Efficiency
77.9%
-
Power Factor
0.930
-