Title :
A new control for multi-phase buck converter with fast transient response
Author_Institution :
ON Semicond., East Greenwich, RI, USA
Abstract :
The new high performance microprocessors require the power supply to provide high current, fast transient response, and tight voltage regulation. Interleaved multiphase synchronous buck converters have recently been adopted in the industry to meet the requirements. To achieve current sharing among the multiple phases, a new control scheme is developed to combine current mode control with V2 control. It has the advantages of fast transient speed, inherent current shaking and easy compensation. In this paper, the principle and implementation of the new control is presented and the transient response is shown. The small signal model of multiphase converter with the new control is derived and applied in converter analysis and voltage loop compensation
Keywords :
AC-DC power convertors; compensation; control system analysis; control system synthesis; electric current control; rectifying circuits; transient response; voltage control; V2 control; control design; control simulation; converter analysis; current mode control; current shaking; fast transient response; interleaved multiphase synchronous buck converters; multi-phase buck converter; small signal model; voltage control scheme; voltage loop compensation; voltage regulation; Automatic control; Buck converters; Feedback; Microprocessors; Power supplies; Pulse width modulation; Signal analysis; Switching converters; Transient response; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.911660
