參數(shù)資料
型號: IR3082
廠商: International Rectifier
英文描述: XPHASE AMD OPTERON/ATHLON 64 CONTROL IC
中文描述: XPHASE AMD皓龍/速龍64控制IC
文件頁數(shù): 28/33頁
文件大?。?/td> 444K
代理商: IR3082
IR3082
Page 28 of 28
12/17/04
VOLTAGE LOOP COMPENSATION
All ceramic output capacitors are used in the design, type III compensation as shown in Figure 18(b) is used here.
Choose the desired crossover frequency fc =80 kHz and determine Rcp and C
CP
:
=
=
=
k
V
V
R
C
L
f
R
o
PWMRMP
FB
E
E
C
CP
31
.
335
.
8
230
)
32
10
47
(
)
10
220
(
)
10
80
2
)
2
6
9
2
3
2
π
π
nF
R
C
L
C
CP
E
E
CP
2
35
10
31
.
)
32
10
47
(
)
/
10
220
(
10
10
3
6
9
=
=
=
, Choose C
CP
=33nF
=
=
=
115
230
2
1
2
1
1
FB
FB
R
R
Choose R
FB1
=100
nF
R
f
C
FB
C
FB
54
.
100
10
80
4
1
4
1
3
1
=
=
=
π
π
, choose C
FB
=10nF
Choose C
CP1
=220pF to reduce high frequency noise.
CURRENT SHARE LOOP COMPENSATION
The crossover frequency of the current share loop f
CI
should be at least one decade lower than that of the voltage
loop f
C
. Choose the crossover frequency of current share loop f
CI
=10kHz
,
and calculate C
SCOMP
,
600
10
100
10
2
18
)
(
)
(
DAC
I
DAC
PWMRMP
I
V
V
V
V
V
2
1
65
.
CI
O
f
V
π
3
3
10
2
1
)
10
42
.
34
100
12
10
2
18
65
.
nF
4
12
=
Choose C
SCOMP
=22nF
011
.
)
35
.
12
(
)
35
.
8
12
(
8
10
3
12
3
=
=
=
PWMRMP
SW
PWMRMP
PWMRMP
R
MI
V
f
C
F
6
_
10
05
.
2
)]
(
+
=
MI
O
O
E
CI
LE
ROOM
CS
O
I
PWMRMP
R
SCOMP
F
I
V
C
f
R
G
I
V
C
π
6
3
4
4
6
3
10
05
.
10
10
2
)
10
5
100
33
.
011
.
]
100
)
10
5
100
33
.
10
1504
10
π
+
=
π
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