Fast Response Control of Stepping Inductance Voltage Regulator Module

Author

Cao, Xiao ; Oruganti, Ramesh

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore

fYear

2005

fDate

16-16 June 2005

Firstpage

382

Lastpage

388

Abstract

Voltage regulator modules (VRM) have stringent efficiency and transient response requirements. A stepping inductance based VRM (SI_VRM) has been proposed by other researchers with the aim of achieving fast dynamic current response under step-load conditions. However, the scheme proposed to control the SI_VRM has several problems, such as high voltage ripple under ´inductor current recovery´ condition and interruption of inductor current without any freewheeling action. In this paper, a new control scheme is proposed for the SI_VRM which can achieve fast transient response, smooth transition between different operating states, low ripple voltage both under normal and inductor current recovery conditions. The paper also investigates the requirements of the stepping inductance and its design. Simulation and experimental results are provided to confirm the expected improvements in performance

Keywords

power inductors; transient response; voltage regulators; dynamic current response; inductor current recovery; inductor current recovery conditions; response control; smooth transition; stepping inductance voltage regulator module; transient response; voltage ripple; Buck converters; Inductance; Inductors; Low voltage; Performance loss; Regulators; Steady-state; Switching frequency; Transient response; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581652

Filename

1581652