IR3081 International Rectifier Corp., IR3081 Datasheet - Page 24

• Manufacturer Part Number: IR3081
• Description: Xphasetm Vr 10 Control Ic
• Manufacturer: International Rectifier Corp.

CURRENT SHARE LOOP COMPENSATION
The crossover frequency of the current share loop should be at least one decade lower than that of the voltage loop
in order to eliminate the interaction between the two loops. A capacitor from SCOMP to ground is usually enough
for the share loop compensation. Choose the crossover frequency of current share loop (f
crossover frequency of voltage loop (f
Where F
Page 24 of 39
C
MI
SCOMP
is the PWM gain in the current share loop
=
. 0
65
C
C
C
R
R
F
CP
MI
CP
CP
FB
FB
*
1
1
R
=
=
=
=
=
=
PWMRMP
R
R
2
2
2
(
2
π
π
FB
PWMRMP
V
π
π
I
∗
∗
∗
∗
∗
−
f
f
2 (
K
K
V
C
f
C
f
C
*
C
PWMRMP
π
∗
∗
V
∗
1
∗
1
*
R
R
I
∗
K
K
*
CP
C
FB
∗
I
PWMRMP
∗
C),
L
O
R
C
E
*
CP
−
and determine the C
∗
FB
G
V
V
C
CS
DAC
V
O
E
O
∗
*
_
∗
∗
ROOM
2
)
f
π
f
SW
( *
K
C
∗
)
V
2
*
I
f
V
*
∗
CI
−
V
PWMRMP
R
,
V
*
PWMRMP
LE
DAC
. 1
*
05
1 [
)
*
+
10
SCOMP
2
π
6
*
f
CI
,
*
C
E
( *
V
O
I
O
)]
*
F
MI
(42)
(37)
(38)
(39)
(40)
(41)
(
43)
CI
10/01
) based on the
IR3081
/04