IR3522 International Rectifier, IR3522 Datasheet - Page 26

• Manufacturer Part Number: IR3522
• Description: DDR & VTT CONTROL IC
• Manufacturer: International Rectifier

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where,
where, Gpwm is the gain of the PWM generator, H is the gain of the feedback filter and
Page 26
b
t
t
t
t
t
t
wz =
wz
wp
wp
K
a
1
3
5
2
4
6
=
=
=
1
=
=
=
=
=
1
=
2
2
Le
1
Le
1
=
=
wz
wp
=
(
−
wc
−
1
1
1 (
wc
wc
10
wc
wc
1
⋅
+
1
wz
1
C
wp
4 .
−
4
+
C
+
4
⋅
⋅
wc
b
⋅
R
1
⋅
(
R
wc
1
(
wz
wp
t
t
wp
⋅
⋅
R
2
4
⋅
2
+
1
1
1
1
1
+
wz
wc
1
2
wp
⋅
2
+
⋅
+
−
2
1
−
+
Rst
2
t
Rc
Rst
3
2
sin(
sin(
wc
2
sin(
sin(
2
Figure 12 Voltage Loop Compensation Network
−
R
+
t
2
+
θ
+
θ
wc
1
θ
θ
⋅
c
c
⋅
c
R
c
Rst
t
)
)
t
Gpwm
)
)
2
2
2
4
⋅
)((
)
Rc
⋅
2
Rc
1
+
−
+
⋅
wc
⋅
b
C
Rst
H
⋅
⋅
2
wc
⋅
a
(
⋅
t
t
)
Rc
1
5
2
2
⋅
⋅
)
+
t
t
)
2
2
6
wc
+
+
⋅
R
a
wc
2
2
(
⋅
Rc
2
wc
⋅
t
⋅
3
C
2
⋅
)(
1 (
t
4
R
−
)
2
+
b
Rst
⋅
wc
)
2
)
−
a
)
2
(28)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(29)
V3.01
IR3522