參數(shù)資料
型號(hào): L6728
廠商: 意法半導(dǎo)體
英文描述: Single phase PWM controller with PowerGOOD
中文描述: 單相PWM控制器與電源良好
文件頁數(shù): 16/32頁
文件大?。?/td> 942K
代理商: L6728
Application details
L6728
16/32
Figure 6.
Example of type III compensation.
Open loop converter singularities:
a)
b)
Compensation Network singularities frequencies:
a)
b)
c)
d)
To place the poles and zeroes of the compensation network, the following suggestions may
be followed:
a)
Set the gain R
F
/R
FB
in order to obtain the desired closed loop regulator bandwidth
according to the approximated formula (suggested values for R
FB
is in the range of
some k
):
Gain
[dB]
Log (Freq)
0dB
open loop
EA gain
closed
loop gain
compensation
gain
open loop
converter gain
F
LC
F
ESR
F
Z1
F
Z2
F
P1
F
P2
20log (R
F
/R
FB
)
20log (V
IN
/
V
OSC
)
F
0dB
F
LC
2
π
L C
OUT
---------------------------------
=
F
ESR
2
π
C
OUT
ESR
-------------------------------------------
=
F
Z1
2
π
R
F
C
F
------------------------------
=
F
Z2
+
2
R
FB
R
S
C
S
----------------------------------------------------
=
F
P1
2
π
R
F
P
C
F
+
C
P
--------------------
--------------------------------------------------
=
F
P2
2
π
R
S
C
S
------------------------------
=
R
F
R
FB
----------
F
F
LC
------------
V
V
IN
------------------
=
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L6728_0706 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Single phase PWM controller with Power Good
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