EVL6566A-75WADP Datasheet, PDF (2/8 Pages) STMicroelectronics – 19 V - 75 W laptop adapter with tracking boost PFC pre-regulator, using the L6563 and the L6566A

Efficiency
1
Efficiency
EVL6566A-75WADP
Table 1 below shows the efficiency with two different input voltages. The table begins with
the nominal load at 80 W on the output and it displays the efficiency at every power
decrease of 5 W.
Table 1.
Efficiency measurements
230 V-50 Hz
Pin
85.73
80.56
74.91
68.68
62.40
56.96
52.31
47.03
41.01
34.40
29.60
24.70
17.86
11.98
6.64
2.73
Pout
75.05
70.00
65.01
59.97
55.01
50.00
45.02
40.00
35.05
30.00
25.02
20.00
14.94
10.00
5.01
1.99
Eff.
87.5%
86.9%
86.8%
87.3%
88.2%
87.8%
86.1%
85.1%
85.5%
87.2%
84.5%
81.0%
83.7%
83.5%
75.5%
72.9%
Pin
87.24
80.73
74.34
68.95
63.80
58.03
51.80
45.45
40.53
35.15
29.00
23.07
18.36
11.88
6.10
2.53
115 V-60 Hz
Pout
75.06
70.00
65.01
60.00
55.02
50.04
45.05
40.00
35.05
30.00
25.02
20.00
15.05
10.00
5.05
1.99
Eff.
86.0%
86.7%
87.4%
87.0%
86.2%
86.2%
87.0%
88.0%
86.5%
85.3%
86.3%
86.7%
82.0%
84.2%
82.8%
78.7%
Above the 20 W power output, the efficiency is constant over 85%.
Figure 1. Overall efficiency versus output power at nominal mains voltages
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