參數(shù)資料
型號: IR3500
廠商: International Rectifier
英文描述: XPHASE3TM VR11.0 & AMD PVID CONTROL IC
中文描述: XPHASE3TM VR11.0
文件頁數(shù): 41/47頁
文件大?。?/td> 778K
代理商: IR3500
IR3500
Page 41 of 47
June 12, 2007
=
+
=
+
=
k
VCCL
(
R
R
R
HOTSET
TMAX
HOTSET
63
.
6
)
7
*
)
931
142
(
6
)
*
)
(
2
1
, choose R
HOTSET1
=3.65k
.
VOLTAGE LOOP COMPENSATION
Type III compensation is used for the converter with only ceramic output capacitors. The crossover frequency and
phase margin of the voltage loop can be estimated as follows.
Choose R
FB
= 1.65k
, and calculate R
DRP
.
=
R
n
O
10
*
91
.
*
6
=
=
k
G
R
R
R
CS
MAX
L
FB
DRP
58
.
34
*
10
*
64
.
*
10
*
65
.
*
3
3
3
_
, choose R
DRP
=6.65k
.
kHz
R
R
G
C
R
f
LE
FB
CS
E
DRP
C
165
)
/
10
*
5
10
*
65
.
34
)
10
*
22
62
(
2
10
*
65
.
2
3
3
6
3
1
=
=
=
π
π
°
=
=
63
180
π
)
tan(
90
1
θ
A
C
Choose
=
=
=
k
R
R
FB
FB
10
.
10
*
65
.
3
2
3
2
3
1
Choose the desired crossover frequency fc (=150kHz) around fc1 estimated above, and calculate
1
1
3
3
1
π
π
nF
R
f
C
FB
C
FB
8
10
*
1
10
*
150
4
4
=
=
=
, choose C
FB
=4.7nF.
nF
R
C
R
R
C
DRP
FB
FB
FB
DRP
0
10
*
65
.
10
*
7
)
10
*
1
+
10
*
65
.
)
(
3
9
3
3
1
=
=
+
=
, choose C
DRP
=2.2nF.
=
=
=
k
V
R
C
L
f
R
I
FB
E
E
C
CP
9
13
12
5
*
10
*
65
.
)
62
10
*
22
(
)
/
10
*
100
(
)
10
*
150
2
5
)
2
3
6
9
2
3
2
π
π
Choose R
FB
=13.7k
.
nF
R
C
L
C
CP
E
E
CP
5
10
7
13
)
62
*
10
*
22
(
)
/
10
*
100
(
10
10
3
6
9
=
=
=
, choose C
CP
=3.3nF.
Choose C
CP1
=47pF to reduce high frequency noise.
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