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Title: "Power Management for Portable Microsystems"
Power management for portable low power systems has special needs: generation of multiple supply voltages, miniaturization and high efficiency at low currents. The research activity on this area often aims at system with all the components on package and solutions that share the inductor for obtaining multiple supply voltages. This presentation deals with the above point and focuses on design methodologies to obtain multiple outputs and to use of very small inductors. The four possible schemes, buck, boost, and inverting or non-inverting buck-boost, are considered. The key specific problems related to the issue are the inductor current switching scheme, the multiple-loops control, the suitable driving of power switches and, accordingly, the converter power efficiency. All the issues are discussed in details. Moreover, design examples of devices integrated with CMOS technologies and the experimental results are presented.
The miniaturization of dc-dc converter requires using very high switching frequency. This must be achieved while maintaining high efficiency, better than the one of a linear converter. The circuit solution discussed in the tutorial foresee a non conventional loop control that enable operation up to 120-MHz switching frequency with peak power efficiency of 87% for 75% duty cycle and 93% at 60 MHz. The results are confirmed by experimental measurements.
New directions, favored by advancement in packaging that enable 3D and pushed by new needs, like the optimal conversion of solar energy, are briefly discussed.
Prof. Franco Maloberti, University of Pavia
Franco Maloberti received the Laurea
degree in physics (summa cum laude) from the
Prof. Maloberti was the recipient of the XII Pedriali Prize for his technical and scientific contributions to national industrial production, in 1992. He was co-recipient of the 1996 Fleming Premium, IEE, the best Paper award, ESSCIRC-2007, and the best paper award, IEEJ Analog Workshop-2007. He received the 1999 IEEE CAS Society Meritorious Service Award, the 2000 IEEE CAS Society Golden Jubilee Medal, and the IEEE Millenium Medal. Dr. Maloberti was Vice-President, Region 8, of the IEEE Circuit and Systems Society (1995-1997), Associate Editor of IEEE-Transaction on Circuit and System-II 1998 and 2006-07, President of the IEEE Sensor Council (2002-2003), member of the BoG of the IEEE-CAS Society (2003-2005) and Vice-President, Publications, of the IEEE CAS Society (2007-2008). He is Distinguished Lecturer of the Solid State Circuit Society and Fellow of IEEE.
Tuesday, April 27, 2010
13900 North Central Expressway
13900 North Central Expressway
From the North: Take 75 south and exit 22
From the South: Take 75 north and exit 23
toward Spring Valley and keep right. After the signal light of the
After entering the Texas Instrument, the
Just in case, you can find the