Datasheet

80 90 100 110 120 130 140
0
50
100
150
200
250
300
350
400
LED CURRENT (mA)
INPUT VOLTAGE (V
RMS
)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
80 90 100 110 120 130 140
0
2
4
6
8
10
P
OUT
(W)
INPUT VOLTAGE (V
RMS
)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
80 90 100 110 120 130 140
76
78
80
82
84
86
EFFICIENCY (%)
INPUT VOLTAGE (V
RMS
)
10 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
POWER FACTOR
INPUT VOLTAGE (V
RMS
)
10 LEDs
9 LEDs
8 LEDs
7 LEDs
www.ti.com 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.
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
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