User manual

80 90 100 110 120 130 140
3
6
9
12
15
P
OUT
(W)
LINE VOLTAGE (V
RMS
)
Original
Mod A
Mod B
Mod C
80 90 100 110 120 130 140
0.980
0.984
0.988
0.992
0.996
1.000
POWER FACTOR
LINE VOLTAGE (V
RMS
)
80 90 100 110 120 130 140
3
6
9
12
15
P
OUT
(W)
LINE VOLTAGE (V
RMS
)
4 LEDs
6 LEDs
8 LEDs
www.ti.com Typical Performance Characteristics
Figure 9. Power Factor vs. Line Voltage Figure 10. Output Power vs. Line Voltage
Original Circuit Original Circuit
Figure 11. Output Power vs.Line Voltage Figure 12. Power MOSFET Drain Voltage Waveform
Modified Circuits (V
IN
= 120V
RMS
, 6 LEDs, I
LED
= 350mA)
Figure 13. Current Sense Waveform Figure 14. FILTER Waveform
(V
IN
= 120V
RMS
, 6 LEDs, I
LED
= 350mA) (V
IN
= 120V
RMS
, 6 LEDs, I
LED
= 350mA)
9
SNVA454E–September 2010–Revised May 2013 AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver
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