Texas Instruments LM3445 Evaluation Board LM3445-120VFLBK/NOPB LM3445-120VFLBK/NOPB Benutzerhandbuch
Produktcode
LM3445-120VFLBK/NOPB
80
90
100
110
120
130
140
3
6
9
12
15
P
O
U
T
(W
)
LINE VOLTAGE (VRMS)
4 LEDs
6 LEDs
8 LEDs
80
90
100
110
120
130
140
3
6
9
12
15
P
O
U
T
(W
)
LINE VOLTAGE (VRMS)
Original
Mod A
Mod B
Mod C
80
90
100
110
120
130
140
90
92
94
96
98
100
PO
W
ER
F
AC
T
O
R
LINE VOLTAGE (VRMS)
4 LEDs
8 LEDs
6 LEDs
80
90
100
110
120
130
140
90
92
94
96
98
100
PO
W
ER
F
AC
T
O
R
LINE VOLTAGE (VRMS)
Original
Mod A
Mod B
Mod C
Typical Performance Characteristics
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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