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L6911E bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện L6911E
Giải thích chi tiết về linh kiện  5-Bit programmable step down controller with synchronous rectification
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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L6911E bảng dữ liệu(HTML) 23 Page - STMicroelectronics

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L6911E
Device description
23/34
Note:
To understand the reason of the previous assumption, the scheme in Figure 11 on page 23
must be considered.
In this scheme, the inductor current has been substituted by the load current, because in the
frequencies range of interest for the Droop function these current are substantially the same
and it was supposed that the droop network don't represent a charge for the inductor.
Figure 11. Voltage regulation with droop function block scheme
It results:
Equation 23
Because in the interested range |Gloop|>>1.
To obtain a flat shape, the relationship considered will naturally follow.
Av(s)
R(s)
Vout
V com p
Iout
d
s
L
s
OUT
R
τ
τ
⋅
+
⋅
+
⋅
1
1
Z
OUT
V
o
I
LOAD
---------------
R
d
1s
τ
L
+
1s
τ
d
+
------------------
G
LOOP
1G
LOOP
+
----------------------------
⋅⋅
R
OUT
1s
τ
L
+
1s
τ
d
+
------------------
⋅
==
=



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