Title :
High-efficiency operation of high-frequency DC/DC conversion for next-generation microprocessors
Author :
Shuo Chen ; Ng, Wai Tulip
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
Fixed-switching-frequency current-mode-controlled zero-voltage-switching quasi-square-wave (ZVS-QSW) buck DC/DC converter was developed to address the challenges of powering next-generation high-end data processors. Aiming at integration, this paper presents a series of design techniques, such as current-conveyor-based Sense-FET current sensing, and accurate dead-time control using delay-locked loop with fast dead-time error rejection for soft-switching realization, etc. These solutions collectively minimize switching losses, maximize efficiency thus allow high switching frequency operations with lowest voltage stress on power devices, less noise, while providing improved transient performance and convenience for paralleling multi-phase converters.
Keywords :
DC-DC power convertors; current conveyors; current-mode circuits; electric current control; frequency control; microprocessor chips; phase convertors; switching convertors; FET current sensing; buck converters; current conveyors; current-mode controlled converters; dead time error rejection; delay locked loop; field effect transistors; fixed switching frequency converters; high end data processors; high frequency DC-DC converter; high switching frequency operations; microprocessors; multi phase converters; quasi square wave converters; switching losses minimisation; zero voltage switching converters; DC-DC power converters; Delay; Error correction; Microprocessors; Performance loss; Stress; Switching converters; Switching frequency; Switching loss; Voltage;
Conference_Titel :
Industrial Electronics Society, 2003. IECON '03. The 29th Annual Conference of the IEEE
Print_ISBN :
0-7803-7906-3
DOI :
10.1109/IECON.2003.1279950
