Title :
Analysis and design of dynamic voltage regulation in multiphase buck converter
Author :
Zhang, Kejiu ; Luo, Shiguo ; Breen, John ; Lin, Shaohua ; Wu, Thomas X. ; Shen, Z. John ; Batarseh, Issa
Author_Institution :
Dell Inc., Round Rock, TX, USA
Abstract :
Dynamic voltage regulation (DVR) [1] is now widely used in microprocessors and system on chip (SOC) systems to reduce operational voltage under light load condition. With the aggressive motivation to reduce power consumption, the design specification of voltage transition (dv/dt) for the DVR is pushing the limit of the multiphase converter design and the component stress as well. In this paper, a novel control scheme is proposed for dealing with fast voltage positioning, i.e. upward and downward. The scenario of reverse current flowing is carefully studied based on the MOSFET parasitic model and experiment results. The stress on the HS MOSFET is also addressed. The effectiveness of the proposed scheme is verified by both simulation and experiment result.
Keywords :
MOSFET; power consumption; power convertors; system-on-chip; voltage control; DVR; MOSFET parasitic model; SOC systems; dynamic voltage regulation; fast voltage positioning; light load condition; microprocessors; multiphase buck converter; operational voltage reduction; power consumption reduction; reverse current flowing; system on chip; voltage transition; Inductors; Logic gates; MOSFET circuits; Pulse width modulation; Schottky diodes; Transient response; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2012 Twenty-Seventh Annual IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4577-1215-9
Electronic_ISBN :
978-1-4577-1214-2
DOI :
10.1109/APEC.2012.6165986
