Title :
Secondary-side control of a constant frequency series resonant converter using dual-edge PWM
Author :
Tschirhart, Darryl J. ; Jain, Praveen K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
Abstract :
48V Voltage regulators (VR) can be used to improve the system efficiency of telecom and data centres by eliminating a converter stage in intermediate bus architectures. Small size and improved transient performance can be achieved through high switching frequency if resonant converters are adopted for these applications. This work proposes the use of a dual-edge PWM controller on the secondary-side of a series resonant converter to remove the opto-coupler from the feedback loop, and allow the achievement of fast dynamic performance. Simulation results of a 4MHz 48V/1.2V, 25A example highlight the fast load transient results achievable with standard linear control.
Keywords :
PWM power convertors; feedback; linear systems; resonant power convertors; PWM controller; constant frequency series resonant converter; current 25 A; data centres; dual-edge PWM; feedback loop; frequency 4 MHz; intermediate bus architectures; secondary-side control; standard linear control; telecom system efficiency; voltage 1.2 V; voltage 48 V; voltage regulators; Control systems; Frequency conversion; Pulse width modulation; Pulse width modulation converters; Regulators; Resonance; Resonant frequency; Telecommunication control; Virtual reality; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Conference_Location :
Palm Springs, CA
Print_ISBN :
978-1-4244-4782-4
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2010.5433617