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A5974D датащи(PDF) 17 Page - STMicroelectronics

номер детали A5974D
подробное описание детали  Zero load current operation
PDF  46 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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A5974D датащи(HTML) 17 Page - STMicroelectronics

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A5974D
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46
Figure 10. Error amplifier equivalent circuit and compensation network
The poles of this transfer function are (if Cc >> C0+CP):
Equation 3
Equation 4
whereas the zero is defined as:
Equation 5
FP1 is the low frequency which sets the bandwidth, while the zero FZ1 is usually put near to
the frequency of the double pole of the L-C filter (see Section 7.2). FP2 is usually at a very
high frequency.
+
-
CP
RC
CC
FB
COMP
ΔV
R0
0.8M
Ω
Gm
ΔV
V+
E/A
RC
CC
CP
C0
10pF
FP1
1
2
R0
Cc
-------------------------------------
=
FP2
1
2
Rc
C0 Cp
+

--------------------------------------------------------
=
FZ1
1
2
Rc
Cc
-------------------------------------
=



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