IR3081M International Rectifier, IR3081M Datasheet - Page 24

• Manufacturer Part Number: IR3081M
• Description: IC PHASE CONTROLLER 28-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3081M

• Applications: Processor
• Current - Supply: 11mA
• Voltage - Supply: 9.5 V ~ 14 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 28-MLPQ
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IR3081M

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