參數(shù)資料
型號: L5980
廠商: 意法半導(dǎo)體
英文描述: 0.7A step-down switching regulator
中文描述: 0.7A的降壓開關(guān)穩(wěn)壓器
文件頁數(shù): 19/37頁
文件大?。?/td> 959K
代理商: L5980
Application informations
L5980
19/37
minimize the dc error on regulated output voltage; finally to place other poles far away the
zero dB frequency.
In
Figure 10
the type III compensation network is shown. This network introduces two zeros
(f
Z1
, f
Z2
) and three poles (f
P0
, f
P1
, f
P2
). They expression are:
Equation 16
Equation 17
Figure 10.
Type III compensation network
In
Figure 11
the Bode diagram of the PWM and LC filter transfer function (G
PW0
· G
LC
(f))
and the open loop gain (G
LOOP
(f)=G
PW0
· G
LC
(f) · G
TYPEIII
(f)) are drawn.
f
Z1
(
2
π
C
3
R
1
R
3
+
)
------------------------------------------------
=
f
Z2
2
π
R
4
C
4
-----------------------------
=
,
f
P0
0
=
f
P1
2
π
R
3
C
3
-----------------------------
=
f
P2
2
π
R
4
5
C
4
+
C
5
--------------------
-------------------------------------------
=
,
,
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