Documents disponibles écrits par cet auteur

Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems / Luo, Feng in IEEE transactions on industrial electronics, Vol. 57 N° 6 (Juin 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2151 - 2160 Titre : Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems Type de document : texte imprimé Auteurs : Luo, Feng, Auteur ; Ma, Dongsheng, Auteur Article en page(s) : pp. 2151 - 2160 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Automatic  substrate  switching  circuit  (ASSC)  Buck-boost  converter  Digital  control  Dynamic  voltage  scaling  (DVS)  Power-efficient  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : An integrated buck-boost converter with a tri-mode digital control is presented. It employs an adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to the ever-increasing electronic systems that employ dynamic voltage scaling (DVS) techniques for power-efficient operations. Three control modes are employed in the converter to operate jointly and seamlessly for performance optimization during the periods of start-up, steady state, and dynamic voltage/load transient states. To avoid latch-up problem and minimize leakage current, an automatic substrate switching circuit (ASSC) is introduced. The design was fabricated in a 0.35-¿m digital CMOS N-well process, with a die area of 1.3 mm2. It precisely regulates an adaptively adjustable power output from 0.9 to 3.0 V. The maximum efficiency is 96.5%, which is measured at 0.9-V output and 45-mW load power. The efficiency remains above 50% over the entire 800-mW power range. The converter responds to a 45-mA load step transient change within 600 ns. The DVS tracking speed is 37 ¿s/V for a 1-V step-down change and is 150 ¿s/V for a 1-V step-up change. With a line regulation of 20.4 mV/V, the converter functions robustly when the input power source frequently varies between 1.6 and 3.3 V. The ASSC consumes only 88- ¿W static power. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289976 [article] Design of digital tri-mode adaptive-output buck–boost power converter for power-efficient integrated systems [texte imprimé] / Luo, Feng, Auteur ; Ma, Dongsheng, Auteur . - pp. 2151 - 2160. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 6 (Juin 2010) . - pp. 2151 - 2160 Mots-clés : Automatic  substrate  switching  circuit  (ASSC)  Buck-boost  converter  Digital  control  Dynamic  voltage  scaling  (DVS)  Power-efficient  system Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : An integrated buck-boost converter with a tri-mode digital control is presented. It employs an adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to the ever-increasing electronic systems that employ dynamic voltage scaling (DVS) techniques for power-efficient operations. Three control modes are employed in the converter to operate jointly and seamlessly for performance optimization during the periods of start-up, steady state, and dynamic voltage/load transient states. To avoid latch-up problem and minimize leakage current, an automatic substrate switching circuit (ASSC) is introduced. The design was fabricated in a 0.35-¿m digital CMOS N-well process, with a die area of 1.3 mm2. It precisely regulates an adaptively adjustable power output from 0.9 to 3.0 V. The maximum efficiency is 96.5%, which is measured at 0.9-V output and 45-mW load power. The efficiency remains above 50% over the entire 800-mW power range. The converter responds to a 45-mA load step transient change within 600 ns. The DVS tracking speed is 37 ¿s/V for a 1-V step-down change and is 150 ¿s/V for a 1-V step-up change. With a line regulation of 20.4 mV/V, the converter functions robustly when the input power source frequently varies between 1.6 and 3.3 V. The ASSC consumes only 88- ¿W static power. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5289976

Design of reconfigurable and robust integrated SC power converter for self-powered energy-efficient devices / Chowdhury, Inshad in IEEE transactions on industrial electronics, Vol. 56 N° 10 (Octobre 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N° 10 (Octobre 2009) . - pp. 4018 - 4028 Titre : Design of reconfigurable and robust integrated SC power converter for self-powered energy-efficient devices Type de document : texte imprimé Auteurs : Chowdhury, Inshad, Auteur ; Ma, Dongsheng, Auteur Article en page(s) : pp. 4018 - 4028 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : DC/DC  power  conversion  Energy  management  Reconfigurable  architecture  Switched-capacitor  (SC)  circuits Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Motivated by emerging self-sustained low-power applications, an integrated power supply solution with a reconfigurable step-up/down switched-capacitor power stage and a dual-loop adaptive gain-pulse control is presented. It makes use of a reconfigurable power stage structure to implement variable gain ratios that provide efficient voltage conversion within wide input/output voltage and power ranges. It also employs an interleaving regulation scheme to significantly reduce the input inrush currents and the output voltage ripples with fast transient response. Design strategy, system optimization, and circuit implementation are addressed in detail. The converter was designed with a standard 0.35-mum digital CMOS n-well process. With an input voltage ranging from 1.5 to 3.3 V, the converter achieves variable step-up/down voltage conversion with a maximum load current of 90 mA. The maximum efficiency is 88%. The converter responds to a 70-mA load-current step change within 4.6 mus, while it robustly operates under a 1.8-V input supply variation. The design can be easily extended and reconfigured for different operation and application scenarios. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801754 [article] Design of reconfigurable and robust integrated SC power converter for self-powered energy-efficient devices [texte imprimé] / Chowdhury, Inshad, Auteur ; Ma, Dongsheng, Auteur . - pp. 4018 - 4028. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 10 (Octobre 2009) . - pp. 4018 - 4028 Mots-clés : DC/DC  power  conversion  Energy  management  Reconfigurable  architecture  Switched-capacitor  (SC)  circuits Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Motivated by emerging self-sustained low-power applications, an integrated power supply solution with a reconfigurable step-up/down switched-capacitor power stage and a dual-loop adaptive gain-pulse control is presented. It makes use of a reconfigurable power stage structure to implement variable gain ratios that provide efficient voltage conversion within wide input/output voltage and power ranges. It also employs an interleaving regulation scheme to significantly reduce the input inrush currents and the output voltage ripples with fast transient response. Design strategy, system optimization, and circuit implementation are addressed in detail. The converter was designed with a standard 0.35-mum digital CMOS n-well process. With an input voltage ranging from 1.5 to 3.3 V, the converter achieves variable step-up/down voltage conversion with a maximum load current of 90 mA. The maximum efficiency is 88%. The converter responds to a 70-mA load-current step change within 4.6 mus, while it robustly operates under a 1.8-V input supply variation. The design can be easily extended and reconfigured for different operation and application scenarios. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4801754