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LINE VOLTAGE (V
AC
)
EFFICIENCY (%)
90
85
80
75
70
80 90 100 110 120 130 140
18 LEDs @ 130 mA
LINE VOLTAGE (V
AC
)
POWER FACTOR
0.95
0.90
0.85
0.80
0.75
80 90 100 110 120 130 140
18 LEDs @ 130 mA
LINE VOLTAGE (V
AC
)
EFFICIENCY
(%)
90
85
80
75
70
80 90 100 110 120 130 140
9 LEDs @ 260 mA
LINE VOLTAGE (V
AC
)
POWER FACTOR
0.95
0.90
0.85
0.80
0.75
80 90 100 110 120 130 140
9 LEDs @ 260 mA
www.ti.com Typical Performance Characteristics
8 Typical Performance Characteristics
Figure 2. Efficiency vs. Line Voltage Figure 3. Power Factor vs. Line Voltage
Original Circuit Original Circuit
Figure 4. Efficiency vs. Line Voltage Figure 5. Power Factor vs. Line Voltage
Modification A Modification A
7
SNVA442C–June 2010–Revised May 2013 AN-2061 LM3445 A19 Edison Retrofit Evaluation Board
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