Datasheet

LM3444-MR16-Boost Reference Design NATIONAL SEMICONDUCTOR Page 19 of 20
Performance with 9 LEDs
Performance without transformer
The table below compares the performance of each reference design when powered directly by a 12VAC source
Specs
LM3441 BOOST 9 LEDs
Units
V
IN
11.92
VAC
I
IN
0.668
A
P
IN
7.51
W
V
OUT
(1)
28.25
VDC
I
LED
(1)
0.220
A
P
OUT
(2)
6.22
W
Efficiency
82.8%
-
Power Factor
0.946
-
Performance with transformer
LET-75
Specs
LM3444 BOOST 9 LEDs
Units
V
IN
120
VAC
I
IN
0.066
A
P
IN
7.74
W
V
OUT
28.0
VDC
I
LED
0.215
A
P
OUT
6.02
W
Efficiency
77.8%
-
Power Factor
0.970
-
HATCH RS12-80M
Specs
LM3444 BOOST 9 LEDs
2 LEDs @ 1A
Units
V
IN
120
VAC
I
IN
0.068
A
P
IN
7.64
W
V
OUT
28.0
VDC
I
LED
0.212
A
P
OUT
5.94
W
Efficiency
77.7%
-
Power Factor
0.930
-