Texas Instruments LM3444 Buck-Boost Topology MR16 LED Bulb Reference Design LM3444MR16BBRB/NOPB LM3444MR16BBRB/NOPB Datenbogen
Produktcode
LM3444MR16BBRB/NOPB
LM3444-MR16-Boost Reference Design
NATIONAL SEMICONDUCTOR
Page 17 of 20
Performance with 7 LEDs
Performance without transformer
The table below compares the performance of each reference design when powered directly by a 12VAC source
Specs
LM3441 BOOST 7 LEDs
Units
V
IN
11.91
VAC
I
IN
0.708
A
P
IN
7.97
W
V
OUT
(1)
23.55
VDC
I
LED
(1)
0.281
A
P
OUT
(2)
6.62
W
Efficiency
83.0%
-
Power Factor
0.948
-
Performance with transformer
LET-75
Specs
LM3444 BOOST 7 LEDs
Units
V
IN
120
VAC
I
IN
0.07
A
P
IN
8.18
W
V
OUT
(1)
23.5
VDC
I
LED
(1)
0.270
A
P
OUT
(2)
6.23
W
Efficiency
77.6%
-
Power Factor
0.970
-
HATCH RS12-80M
Specs
LM3444 BOOST 7 LEDs
2 LEDs @ 1A
Units
V
IN
120
VAC
I
IN
0.072
A
P
IN
8.13
W
V
OUT
23.5
VDC
I
LED
0.270
A
P
OUT
6.23
W
Efficiency
78.0%
-
Power Factor
0.934
-