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AN3286 Datasheet(PDF) 23 Page - STMicroelectronics

Part # AN3286
Description  This document describes
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3286 Datasheet(HTML) 23 Page - STMicroelectronics

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AN3286
Testing the board
Doc ID 17998 Rev 1
23/42
Figure 23 shows the input power vs. input voltage for no load and light load conditions.
Figure 23.
Input power vs. input voltage for no load and light load conditions
Depending on the equipment supplied, there are several criteria to measure the standby or
light load performance of a converter. One of these is the measurement of the output power
when the input power is equal to one watt. Table 17 shows the output power needed to
obtain 1 W of input power in different line conditions. Figure 24 shows the results of this
measurement.
Table 17.
Converter efficiency when the input power is 1 W
VIN (VAC)
PIN (W)
Eff. (%)
90
1
82.21
115
1
81.54
150
1
80.63
180
1
79.66
230
1
78.10
265
1
76.82



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