Talk 3.5: 9:30AM–10:45AM
| Session Name: | Advances in Power Delivery and Protection |
| Session Time: | 9:30AM–10:45AM |
| Author Name: | Zdravko Lukic |
| Author Email: | zdravko.lukic@utoronto.ca |
| Talk Title: | Universal and Fault-Tolerant Multiphase Digital PWM Controller IC for High-Frequency DC-DC Converters |
| Slides: | 3-5.pdf |
| Abstract: | This work presents a flexible 4-phase digital PWM controller IC for Switch-Mode Power Supplies that can be used with interleaved, multi-output, and parallel dc-dc switching converters operating at frequencies up to 10 MHz. The IC can be programmed to operate with any number of phases and it is fault-tolerant. If during the interleaved mode a failure in one of the phases occurs, it automatically switches to operation with reduced number of phases by disabling the critical phase and adjusting the angles of the remaining ones. The key element is a new multiphase digital pulse-width modulator that utilizes a programmable counter, a delay line, and a digital logic with the variable number representation. This IC is realized in a standard 0.18 um CMOS process and exhibits low power consumption of 45 uA/MHz per phase. The controller operation is also experimentally verified with a 1 MHz, 25 W, 4-phase interleaved buck converter. |
| Research Group: | Energy Systems |
| Degree Program: | Ph.D. |
| Author Bio: | Zdravko Lukic received the Dipl. Ing. degree in electrical engineering from the University of Novi Sad, in Serbia and the M.A.Sc. degree in electrical engineering from the University of Toronto, in 2003 and 2006, respectively. He is presently pursuing the Ph.D. degree at the Laboratory for Low-Power Management and Integrated Switch-Mode Power Supplies, Energy Systems Group. His research interests include digital control techniques and low-power mixed-signal IC design for high-frequency switch-mode power supplies. |