6533b81ffe1ef96bd1277b84

RESEARCH PRODUCT

Current-Sensing Technique for Current-Mode Controlled Voltage Regulator Modules

Filippo MarinoPatrizia LivreriValeria BoscainoM. Minieri

subject

EngineeringCurrent sensing Current sharing Multiphase buckconverteBuck converterbusiness.industryGeneral EngineeringBuck–boost converterĆuk converterElectrical engineeringVoltage regulatorInductorPower electronicsBoost converterElectronic engineeringRC circuitbusiness

description

This paper introduces an innovative current-sense technique for voltage regulator modules (VRMs). The proposed method is applied to a multiphase buck converter although the converter topology does not affect the accuracy or effectiveness of the proposed technique. A RC network is parallel connected with the buck converter low-side MOSFET and the voltage signal across the sense capacitor reconstructs the inductor current waveform. The RC technique benefits from all the advantages of the most popular current-sensing technique, the inductor DC resistance current-sense method, cutting off its main disadvantage. The sense network design is oriented to obtain high immunity to noise and a great dynamic in current-mode control by properly selecting the sense signal slop during Ton and Toff time slots. A laboratory prototype of a multiphase buck converter with current-mode control implementing the proposed current-sense method is described and experimental results are shown. © 2008 Elsevier Ltd. All rights reserved.

yearjournalcountryeditionlanguage
2008-12-01
10.1016/j.mejo.2008.05.015http://hdl.handle.net/10447/30380