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AN3286 Fiches technique(PDF) 21 Page - STMicroelectronics

No de pièce AN3286
Description  This document describes
PDF  42 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3286 Fiches technique(HTML) 21 Page - STMicroelectronics

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AN3286
Testing the board
Doc ID 17998 Rev 1
21/42
The criteria are plotted in Figure 22, where the red line depicts the criteria for the standard
model and the blue line the criteria for the low voltage model. The PNO axis uses
a logarithmic scale.
Figure 22.
ENERGY STAR efficiency criteria
The presented power supply belongs to the low-voltage power supply category and, in order
to be compliant with ENERGY STAR requirements, needs to have an efficiency higher than
73.37%. For all the considered input voltages, the efficiency results (see Table 8) are higher
than the recommended value.
2.5
Light load performances
The input power of the converter was measured in no load conditions for different input
voltages. The results are given in Table 13.
Version 2.0 of the ENERGY STAR program also takes into consideration the power
consumption of the power supply when it is not loaded. The criteria to be compliant with are
reported in Table 14.
Table 13.
No load input power
VIN (VAC)
PIN (mW)
90
15
115
17
150
20
180
23
230
28
265
33



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