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AN3011 Datasheet(PDF) 19 Page - STMicroelectronics

Part # AN3011
Description  In certain applications such as LCD or plasma TVs
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3011 Datasheet(HTML) 19 Page - STMicroelectronics

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AN3011
Efficiency
Doc ID 16043 Rev 1
19/37
3.1.2
Low-load performance
The demonstration board was tested not only in no-load condition but also with a low-load
applied. The tests were performed with 30 mW, 50 mW, 100 mW and 200 mW with brown-
out protection enabled and with brown-out protection disabled
●
POUT = 30 mW
●
POUT = 50 mW
Table 12.
Low-load performance. POUT = 30 mW (brown-out disabled)
VIN_AC
POUT (mW)
PIN (mW)
Eff. (%)
PIN-POUT
(mW)
fSW_AVG (kHz)
90
29.48
51.60
57.13
22.12
3.731
115
29.48
54.40
54.19
24.92
3.375
132
29.48
55.00
53.60
25.52
3.155
175
29.48
59.60
49.47
30.12
2.814
230
29.48
69.00
42.73
39.52
2.876
265
29.48
74.00
39.84
44.52
2.534
Table 13.
Low-load performance. POUT = 30 mW (brown-out enabled)
VIN_AC
POUT (mW)
PIN (mW)
Eff. (%)
PIN-POUT (mW)
90
29.48
54.80
53.80
25.32
115
29.48
57.90
50.92
28.42
132
29.48
62.30
47.32
32.82
175
29.48
69.80
42.24
40.32
230
29.48
87.00
33.89
57.52
265
29.48
101.00
29.19
71.52
Table 14.
Low-load performance. POUT = 50 mW (brown-out disabled)
VIN_AC
POUT (mW)
PIN (mW)
Eff. (%)
PIN-POUT (mW)
fSW_AVG (kHz)
90
54.39
85.90
63.32
31.51
6.248
115
54.39
87.40
62.23
33.01
5.663
132
54.39
88.20
61.66
33.81
5.314
175
54.39
94.80
57.37
40.41
5.259
230
54.39
104.00
52.30
49.61
4.845
265
54.39
111.00
49.00
56.61
4.299



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