Talk 3.6: 9:30AM–10:45AM
| Session Name: | Advances in Power Delivery and Protection |
| Session Time: | 9:30AM–10:45AM |
| Author Name: | Zhenyu Zhao |
| Author Email: | zhenyu@ele.utoronto.ca |
| Talk Title: | Continuous-Time Digital Signal Processing Based Controller for High-Frequency DC-DC Converters |
| Slides: | 3-6.ppt |
| Abstract: | This paper introduces a digital dual-mode controller for low-power high-frequency dc-dc switch-mode power supplies (SMPS). In steady state the controller behaves as a conventional digital PWM controller, and during transients it utilizes continuous-time digital signal processing to achieve very fast transient response. The continuous time DSP is triggered by a sudden change of output voltage. Then it performs a charge-balance based algorithm to achieve voltage recovery through a single on off action of the power switch. The effectiveness of the method is demonstrated on an experimental 5 V-to- 2V, 400 kHz, 2.5 W buck converter that recovers voltage in the time equivalent to 3 PWM switching cycles, approaching converter physical limitations. |
| Research Group: | Energy Systems |
| Degree Program: | Ph.D. |
| Author Bio: | Zhenyu Zhao was born in Tianjin, China in 1978. He received the B.Eng. degree in electrical engineering from the Shanghai Jiao Tong University, Shanghai, China in 1999 and the M.E.Sc. degree from the University of Western Ontario, ON, Canada in 2004. He is currently pursuing Ph.D. degree in electrical engineering at the University of Toronto, ON, Canada. Since May 2005, he has been a Research Assistant in the laboratory of Low-Power Management and Integrated Switch-Mode Power Supplies, University of Toronto. His research interests include modeling and control techniques, power electronics, and mixed-signal VLSI and/or DSP implementation for power management applications. |