User manual

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
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
90
92
94
96
98
100
POWER FACTOR
LINE VOLTAGE (V
RMS
)
4 LEDs
8 LEDs
6 LEDs
80 90 100 110 120 130 140
90
92
94
96
98
100
POWER FACTOR
LINE VOLTAGE (V
RMS
)
Original
Mod A
Mod B
Mod C
Typical Performance Characteristics www.ti.com
Figure 12. Power Factor vs. Line Voltage Figure 13. Power Factor vs. Line Voltage
Original Circuit Modified Circuits
Figure 14. Output Power vs. Line Voltage Figure 15. Output Power vs. Line Voltage
Original Circuit Modified Circuits
Figure 16. Power MOSFET Drain Voltage Waveform Figure 17. Current Sense Waveform
(V
IN
= 120V
RMS
, 6 LEDs, I
LED
= 350mA) (V
IN
= 120V
RMS
, 6 LEDs, I
LED
= 350mA)
12
AN-2034 LM3445 -120VAC, 8W Isolated Flyback LED Driver SNVA429C–August 2010–Revised May 2013
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