DocumentCode :
1816541
Title :
A two stage voltage regulator module with fast transient response capability
Author :
Alou, P. ; Cobos, J.A. ; Prieto, R. ; García, O. ; Uceda, J.
Author_Institution :
Dept. de Ingenieria Electron., Univ. Politecnica de Madrid, Spain
Volume :
1
fYear :
2003
fDate :
15-19 June 2003
Firstpage :
138
Abstract :
Multiphase converters based on buck topology are very good candidates for voltage regulator modules that convert from 5 V or 12 V down to 1.5 V. However, their applicability is very restricted at higher input voltages (24 V, 48 V). In those applications where a fast dynamic on-board DC/DC converter with a high input voltage (24 V, 48 V) is required, interleaved buck topology can still be useful if a "DC/DC current transformer" is used to adapt the voltage and current levels, providing a symmetric operation (around 50% duty cycle) to the multiphase converter. A "two phases synchronous buck + current fed push pull (50%)" prototype is tested to validate the concept in a 24 V to 1 V-50 A converter with a fast transient response capability (20 A/gs). Measured efficiency is 84% at 1 V, 50 A (91% at 25 A). The proposed solution is compared with other candidates for the same specifications: "single stage half bridge" converter, "two-phases half bridge" converter and "three-phases half bridge" converter.
Keywords :
DC-DC power convertors; bridge circuits; computer power supplies; transient response; voltage control; voltage regulators; 1.5 V; 12 V; 24 V; 25 A; 48 V; 5 V; 50 A; 84 percent; 91 percent; DC/DC current transformer; buck topology; current fed push pull converter; fast dynamic on-board DC/DC converter; fast transient response capability; high input voltage; microprocessor power supplies; multiphase converter; single stage half bridge converter; symmetric operation; three-phases half bridge converter; two phases synchronous buck converter; two stage voltage regulator module; two-phases half bridge converter; Bridge circuits; Buck converters; Current transformers; Microprocessors; Prototypes; Regulators; Testing; Topology; Transient response; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual
ISSN :
0275-9306
Print_ISBN :
0-7803-7754-0
Type :
conf
DOI :
10.1109/PESC.2003.1218286
Filename :
1218286
Link To Document :
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