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DFS04M Datasheet(PDF) 23 Page - STMicroelectronics

Part # DFS04M
Description  APPLICATION NOTE
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

DFS04M Datasheet(HTML) 23 Page - STMicroelectronics

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AN1262 APPLICATION NOTE
Figure 10. Plant transfer function G2(j
ω) of DCM Flyback (Bode Plots)
Table 15. Plant Transfer Function and its Main Quantities
Figure 11. Controller Transfer Function G1(j
ω) (Bode Plots)
Symbol
Definition
G2(j
ω)
G20
fESR
fout
Gain
[dB]
Phase
[°]
Gain
Phase
0
-90
0
fout
G20
fESR
G2 j
ω
()
G2
0
1
j
ω
ω
ES R
--------------
+
1
j
ω
ω
out
-----------
+
------------------------
⋅
=
G2
0
D
max
V
s
-------------- V
in
R
out
2Lp f
sw
⋅⋅
---------------------------
⋅⋅
=
f
ESR
ω
ESR
2
π
⋅
--------------
=
1
2
π ESR C
out
⋅⋅
⋅
---------------------------------------------
=
f
out
ω
out
2
π
⋅
-----------
1
π R
out
C
out
⋅⋅
------------------------------------
==
Gain
[dB]
Phase
[°]
Gain
Phase
0
-90
0
f
fZ
fP



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