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AN2840 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN2840
Description  charger demonstration board based on the VIPER17HN
PDF  19 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2840 Datasheet(HTML) 11 Page - STMicroelectronics

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AN2840
Electrical performance
11/19
4
Electrical performance
4.1
Efficiency and no-load measurements
Tables 1 and 2 show board efficiency at the two nominal voltages.
Figure 15.
Efficiency vs output power
Table 1.
Efficiency at 115 VAC
% load
Io [A]
Vo [V]
Po [W]
Iin [mA]
Pin [W]
Efficiency
25%
0.2501
5.118
1.2800
32.5
1.708
74.9%
50%
0.5005
5.165
2.5851
57.0
3.391
76.2%
75%
0.7507
5.205
3.9074
82.0
5.263
74.2%
100%
0.9993
5.275
5.2713
106.6
7.19
73.3%
Average efficiency
74.7%
Table 2.
Efficiency at 230 VAC
% load
Io [A]
Vo [V]
Po [W]
Iin [mA]
Pin [W]
Efficiency
25%
0.2501
5.118
1.2800
22.5
1.905
67.2%
50%
0.5004
5.163
2.5836
39.8
3.795
68.1%
75%
0.7507
5.197
3.9014
52.4
5.328
73.2%
100%
0.9993
5.262
5.2583
67.4
7.256
72.5%
Average efficiency
70.2%



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