Texas Instruments LM3448 -120VAC, 6W Isolated Flyback LED Driver Eval Board LM3448-120VFLBK/NOPB LM3448-120VFLBK/NOPB Datenbogen
Produktcode
LM3448-120VFLBK/NOPB
80
90
100
110
120
130
140
0
50
100
150
200
250
300
350
400
L
ED
C
U
R
R
EN
T
(
mA)
INPUT VOLTAGE (VRMS)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
9 LEDs
8 LEDs
7 LEDs
80
90
100
110
120
130
140
0
2
4
6
8
10
P
O
U
T
(W
)
INPUT VOLTAGE (VRMS)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
9 LEDs
8 LEDs
7 LEDs
80
90
100
110
120
130
140
76
78
80
82
84
86
EF
F
IC
IEN
C
Y
(%
)
INPUT VOLTAGE (VRMS)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
9 LEDs
8 LEDs
7 LEDs
80
90
100
110
120
130
140
0.93
0.94
0.95
0.96
0.97
0.98
P
O
W
ER
F
AC
T
O
R
INPUT VOLTAGE (VRMS)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
9 LEDs
8 LEDs
7 LEDs
Typical Performance Characteristics
5
Typical Performance Characteristics
T
J
=25°C and V
CC
=12V, unless otherwise specified.
NOTE: Plots of 10 LED performance based on original schematic except that D1 is a 250V TVS and the
OVP circuit has been removed.
OVP circuit has been removed.
Figure 3. Efficiency vs. Line Voltage
Figure 4. Power Factor vs. Line Voltage
Figure 5. LED Current vs. Line Voltage
Figure 6. Output Power vs. Line Voltage
Figure 7. SW FET Drain Voltage Waveform
Figure 8. FLTR2 Waveform
(V
IN
= 120V
RMS
, 9 LEDs, I
LED
= 228mA)
(V
IN
= 120V
RMS
, 9 LEDs, I
LED
= 228mA)
5
SNOA554C – October 2011 – Revised May 2013
AN-2090 LM3448 -120VAC, 6W Isolated Flyback LED Driver
Copyright © 2011–2013, Texas Instruments Incorporated