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AN3028 Fiches technique(PDF) 27 Page - STMicroelectronics

No de pièce AN3028
Description  demonstration board using the VIPer16LN
PDF  37 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3028 Fiches technique(HTML) 27 Page - STMicroelectronics

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AN3028
Guidelines for feedback loop calculation
Doc ID 16135 Rev 1
27/37
If the margin is not high enough, another choice should be done for fZc, fPc and fcross, and
the procedure repeated.
When the stability is ensured, the next step is to find the values of the schematic
components, which can be calculated using the formulas below, as follows:
Equation 10
Equation 11
Equation 12
Equation 13
1
3
.
3
Vout
6
R
5
R
−
=
6
R
5
R
5
R
0
C
Gm
fPc
fZc
7
C
+
⋅
⋅
=
⎟
⎠
⎞
⎜
⎝
⎛
−
⋅
=
1
fZc
fPc
7
C
8
C
8
C
7
C
fPc
2
8
C
7
C
7
R
⋅
⋅
⋅
π
⋅
+
=



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