DER-56
UPS Battery Charger - LNK520
April 20, 2005
9.3 Efficiency and Input Power Comparison to Transformer + LDO
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
40
36
32
28
24
20
16
12
8
LNK520 Flyback (% eff)
Linear Transformer (% eff)
LNK520 Flyback Input Power
Linear Transformer Input Power
4
0
1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Load Current (ADC)
Figure 8 – Efficiency and Input Power at 120VAC Input, Room Temperature, 60 Hz.
Power Integrations
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