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AN3028 датащи(PDF) 21 Page - STMicroelectronics

номер детали AN3028
подробное описание детали  demonstration board using the VIPer16LN
PDF  37 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3028 датащи(HTML) 21 Page - STMicroelectronics

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AN3028
Burst mode and output voltage ripple
Doc ID 16135 Rev 1
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The input power vs. input voltage for no-load and low-load condition (Table 12, 14 and 15)
are shown in the figures below.
Depending on the equipment supplied, we can have several criteria to measure the standby
or light-load performance of a converter. One criterion is the measure of the output power
when the input power is equal to one watt. In Table 16 the output power needed to have 1 W
of input power in different line conditions is given. Figure 24 shows the output power
corresponding to PIN = 1 W for different values of the input voltage.
Table 15.
Low-load performance, POUT = 50 mW
VIN_AC
POUT (mW)
PIN (mW)
efficiency (%)
Without
self-supply
With
self-supply
Without
self-supply
With
self-supply
90
50
91
161
54.55
31.09
115
50
94
187
52.98
26.74
150
50
100
224
50.00
22.30
180
50
100
252
50.00
19.84
230
50
102
300
48.88
16.67
265
50
105
335
47.62
14.95
Figure 23.
PIN vs. VIN at POUT = 0; 25 mW; 50 mW
a) without self-supply (J2 selected)
b) with self-supply (J and J2 not selected)



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