ir3500v International Rectifier Corp., ir3500v Datasheet - Page 29

• Manufacturer Part Number: ir3500v
• Description: Xphase3 Vr11.1 Cpu Vtt Control Ic
• Manufacturer: International Rectifier Corp.

C
A ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for Non-AVP Applications
Resistor R
the switching frequency per phase and select the desired phase margin θc. Calculate K factor from (31), and
determine the component values based on (32) to (36),
CP1
is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise.
Page 29 of 34
DRP
and capacitor C
C
C
C
C
K
R
R
CP
CP
CP
CP
FB
FB
=
1
1
tan[
=
=
=
=
=
=
R
2
10
2
2
2
π
π
FB
π
π
π
4
∗
∗
∗
∗
∗
∗
∗
f
f
R
(
2 (
K
K
C
f
C
f
L
180
θ
C
DRP
C
CP
E
π
∗
∗
C
∗
1
∗
1
R
R
∗
∗
K
K
+
CP
FB
C
are not needed. Choose the crossover frequency fc between 1/10 and 1/5 of
1
∗
∗
E
L
5 .
R
C
E
V
)]
CP
∗
FB
I
C
∗
E
K
∗
f
C
)
2
∗
5
(30)
(31)
(32)
(33)
(34)
(35)
(36)
July 03, 2008
IR3500V