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AN3095 Folha de dados(PDF) 20 Page - STMicroelectronics

Nome de Peças AN3095
Descrição Electrónicos  The STEVAL-ISV002V2 demonstration board is the same
PDF  55 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3095 Folha de dados(HTML) 20 Page - STMicroelectronics

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DC-DC converter design
AN3095
20/55
Doc ID 16555 Rev 3
The total copper losses are:
Equation 39
From the core loss curve of N87 material, at 100 °C, 0.15 T and 35 kHz, the selected core
has the following losses:
Equation 40
Where Ve=102000 mm
3 is the core volume of one set of E75/33/32.
The efficiency of the transformer is:
Equation 41
The transformer temperature rise is:
Equation 42
With
Equation 43
W
9
.
20
I
R
I
R
P
P
P
2
s
s
in
2
p
s
p
Cu
=
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=
+
=
W
4
V
2
m
kW
20
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e
3
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=
⋅
•
=
%
17
.
99
100
*
3000
9
.
24
1
T
=
⎟
⎠
⎞
⎜
⎝
⎛ −
=
η
()
C
68
.
79
P
P
R
5
.
0
T
o
V
Cu
th
r
=
+
•
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W
C
4
.
6
R
o
th =



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