IR3080MPBF International Rectifier, IR3080MPBF Datasheet - Page 7
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IR3080MPBF
Manufacturer Part Number
IR3080MPBF
Description
IC PHASE CONTROLLER 32MLPQ
Manufacturer
International Rectifier
Series
XPhase™r
Datasheet
1.IR3080MTRPBF.pdf
(41 pages)
Specifications of IR3080MPBF
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
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
SYSTEM THEORY OF OPERATION
XPhase
The XPhase
requiring small size, design flexibility, low voltage, high current and fast transient response. The architecture can
control converters of any phase number where flexibility facilitates the design trade-off of multiphase converters.
The scalable architecture can be applied to other applications which require high current or multiple output voltages.
As shown in Figure 1, the XPhase
each using a single Phase IC. The Control IC communicates with the Phase ICs through a 5-wire analog bus, i.e.
bias voltage, phase timing, average current, error amplifier output, and VID voltage. The Control IC incorporates all
the system functions, i.e. VID, PWM ramp oscillator, error amplifier, bias voltage, and fault protections etc. The
Phase IC implements the functions required by the converter of each phase, i.e. the gate drivers, PWM comparator
and latch, over-voltage protection, and current sensing and sharing.
There is no unused or redundant silicon with the XPhase
controller that can be configured for 2, 3, or 4 phase operation. PCB Layout is easier since the 5 wire bus
eliminates the need for point-to-point wiring between the Control IC and each Phase. The critical gate drive and
current sense connections are short and local to the Phase ICs. This improves the PCB layout by lowering the
parasitic inductance of the gate drive circuits and reducing the noise of the current sense signal.
ENABLE
Page 7
12V
VID5
VID0
VID1
VID2
VID3
VID4
TM
Architecture
TM
IR3080
CONTROL
IC
architecture is designed for multiphase interleaved buck converters which are used in applications
>> BIAS VOLTAGE
>> PHASE TIMING
<< CURRENT SENSE
>> PWM CONTROL
>> VID VOLTAGE
OC
OC
CONTROL BUS
OC
TM
OC
architecture consists of a Control IC and a scalable array of phase converters
OC
OC
OC
PHASE FAULT
BIAS VOLTAGE
PHASE TIMING
CURRENT SHARE
PWM CONTROL
VID VOLTAGE
PHASE HOT
PHASE FAULT
BIAS VOLTAGE
PHASE TIMING
CURRENT SHARE
PWM CONTROL
VID VOLTAGE
PHASE HOT
Figure 1. System Block Diagram
ADDITIONAL PHASES
IR3086A
PHASE IC
IR3086A
PHASE IC
TM
architecture compared to others such as a 4 phase
CCS
CCS
0.1uF
0.1uF
RCS
RCS
GATE VOLTAGE
REGULATOR
INPUT/OUTPUT
OC
OC OC
CIN
COUT
IR3080PbF
VCCVID (1.2V@150mA)
POWER GOOD
PHASE FAULT
VR HOT
VOUT SENSE+
VOUT+
VOUT-
VOUT SENSE-