IR3080MTRPBF International Rectifier, IR3080MTRPBF Datasheet - Page 21

• Manufacturer Part Number: IR3080MTRPBF
• Description: IC CONTROLLER PHASE 32LMLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3080MTRPBF

• Applications: Processor
• Current - Supply: 11mA
• Voltage - Supply: 9.5 V ~ 14 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 32-MLPQ
• Ic Function: Control IC With VCCVID And Overtemp Detect
• Supply Voltage Range: 9.5V To 14V
• Operating Temperature Range: 0°C To +100°C
• Digital Ic Case Style: MLPQ
• No. Of Pins: 32
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Controller Type: PWM
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 150kHz to 1.0MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: IR3080MPBFTR; IR3080MTRPBF; IR3080MTRPBFTR

VDAC Slew Rate Programming Capacitor C
The slew rate of VDAC down-slope SR
Equation (8), where I
compensate VDAC circuit and is determined by Equation (9). The slew rate of VDAC up-slope SR
to that of VDAC down-slope and is given by Equation (10), where I
shown in Figure15.
Over Current Setting Resistor R
The inductor DC resistance is utilized to sense the inductor current. The copper wire of inductor has a constant
temperature coefficient of 3850 ppm/°C, and therefore the maximum inductor DCR can be calculated from Equation
(11), where R
T_
The current sense amplifier gain of IR3086A decreases with temperature at the rate of 1470 ppm/°C, which
compensates part of the inductor DCR increase. The phase IC die temperature is only a couple of degrees Celsius
higher than the PCB temperature due to the low thermal impedance of MLPQ package. The minimum current sense
amplifier gain at the maximum phase IC temperature T
The total input offset voltage (V
(V
sense resistors R
The over current limit is set by the external resistor R
over current limit. I
and is determined by the curve in Figure 14. K
phase and is calculated from Equation (15).
CS_OFST)
ROOM
Page 21
respectively.
of the amplifier itself and that created by the amplifier input bias currents flowing through the current
L_MAX
t
SSDEL
CS+
OCSET,
V
G
SR
R
R
K
C
R
and R
CS
OCSET
L
CS
and R
P
SINK
VDAC
VDAC
UP
=
_
_
=
MAX
_
TOFST
C
MIN
=
(
V
SS
is the sink current of VDAC pin as shown in Figure 15. The resistor R
=
=
the bias current of OCSET pin, changes with switching frequency setting resistor R
=
L_ROOM
I
I
CS-
C
/
=
SOURCE
0
=
[
−
SR
DEL
VDAC
5 .
I
R
=
V
I
G
LIMIT
.
SINK
L
O
DOWN
V
+
n
CS
*
_
CS
)
3
ROOM
∗
1 (
CS_TOFST
OCSET
_
2 .
C
_
V
ROOM
3 .
are the inductor DCR at maximum temperature T
∗
OFST
O
VDAC
∗
I
R
I
−
CHG
O
10
/(
L
R
∗
L
_
/
DOWN
−
1 [
+
SS
2
∗
MAX
n
∗
15
1 [
I
V
+
/
CSIN
DEL
) of current sense amplifier in phase ICs is the sum of input offset
I
−
3850
∗
∗
1470
1 (
VDAC
+
f
*
can be programmed by the external capacitor C
SW
P
+
∗
I
*
CHG
R
is the ratio of inductor peak current over average current in each
K
∗
*
10
CS
P
10
) 2
and Resistor R
)
−
+
)
OCSET
6
+
−
IC_MAX
−
=
6
∗
V
I
∗
CS
C
(
CSIN
T
(
SS
T
L
_
_
IC
TOFST
/
as defined in Equation (14), where I
−
DEL
MAX
_
is calculated from Equation (12).
∗
MAX
R
*
CS
]
−
G
1 (
−
T
CS
−
3 .
VDAC
ROOM
T
70
SOURCE
_
−
ROOM
MIN
R
*
10
SS
)]
/
/
−
)]
I
DEL
6
OCSET
is the source current of VDAC pin as
∗
70
*
10
L_MAX
−
6
)
(10)
(11)
(12)
(13)
(14)
(15)
and room temperature
(8)
(9)
IR3080PbF
LIMIT
VDAC
(
UP
7)
VDAC
is proportional
is the required
as defined in
is used to
OSC