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AN4070 Datasheet(PDF) 12 Page - STMicroelectronics

Part # AN4070
Description  250 W grid connected microinverter
PDF  53 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4070 Datasheet(HTML) 12 Page - STMicroelectronics

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DC-DC converter design
AN4070
12/53
Doc ID 022934 Rev 1
9.
Calculation of input current ripple:
Equation 9
10. Calculation of input inductors value:
Equation 10
11. Calculation of diodes RMS current:
Equation 11
12. Calculation of output capacitor value:
Equation 12
13. Calculation of capacitor ripple current:
Equation 13
14. Calculation of maximum capacitor ESR:
Equation 14
15. Calculation of main power devices breakdown voltage:
Equation 15
A
I
I
A
I
I
A
I
I
in
ripple
ind
in
ind
15
.
0
2
31
.
0
2
31
.
0
2
625
.
0
lim
=
=
Δ
=
=
Δ
=
Δ
=
=
Δ
uH
f
I
D
V
L
A
I
I
s
ind
switch
in
in
ind
640
625
.
0
2
max
_
min
_
=
⋅
Δ
⋅
=
=
Δ
⋅
=
Δ
A
n
I
D
I
in
rms
D
3
.
3
6
.
2
2
8
.
12
2
.
0
2
2
2
max
max
=
⋅
⋅
−
=
⋅
⋅
−
=
uF
V
T
D
I
C
s
o
92
.
1
2
.
0
10
57
.
28
2
.
0
675
.
0
6
max
=
⋅
⋅
⋅
=
Δ
⋅
⋅
≥
−
ΔI
cap
I
in
2n
⋅
-------------
2.4A
=
=
Ω
=
=
Δ
Δ
=
m
I
V
ESR
cap
cap
3
.
83
4
.
2
2
.
0
max
max
V
n
V
V
out
brdw
2
.
99
6
.
2
2
430
2
2
.
1
max
=
⋅
=
⋅
⋅
≥



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