Modeling of unbalanced multiphase buck converters with applications to voltage regulator module control

Multiple parallel-input parallel-output low-output voltage converters serve high-current high-slew rate loads, often using current mode control to achieve tight output voltage regulation. One way to enhance slew rate performance is to combine unbalanced phases: a low inductance converter in parallel...

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Bibliographic Details
Main Authors: Mossoba, J.T., Krein, P.T.
Format: Conference Proceeding
Language:English
Subjects:
Application software
Buck converters
DC-DC power converters
Impedance
Inductance
Inductors
Phase change materials
Regulators
Sensorless control
Voltage control
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Description
Summary:Multiple parallel-input parallel-output low-output voltage converters serve high-current high-slew rate loads, often using current mode control to achieve tight output voltage regulation. One way to enhance slew rate performance is to combine unbalanced phases: a low inductance converter in parallel with one or more conventional phases can deliver fast slews without altering low-frequency performance. An unbalanced combination is facilitated by combining conventional current-mode controls with sensorless current mode (SCM) controls; The dynamic properties resulting from using equal and unequal filter inductances for parallel converters are investigated for a 12 V to 1.5 V 100 A VRM.
ISSN:1048-2334
2470-6647
DOI:10.1109/APEC.2005.1453216