Event organized by Power Electronics Society (PELS)
Time: 1:00pm to 5:30pm
Location: Texas Instruments, Building E Auditorium, 2900 Semiconductor Dr, Santa Clara, CA 95051
REGISTRATION LINK: here
General Attendees: $80, IEEE Members: $60, PELS and CASS members: $50
Students and TI-ers: FREE (Limit 10 each)
All on-site registrations will be $100
1:10pm to 2:00pm: Introduction to Control Loops
Abstract: This talk starts out easy on the several simple control methods for a switching power supply. It covers
fixed frequency for both voltage modes and current mode control. Showing how adding in just the right
amount of extra ramp help stabilize the output for >50% duty cycles. Variable frequency control methods like
Constant ON Time and a few of its variations are covered. To be able to shape the gain and keep it stable, we
will cover the error amp and its compensation, covering Type1, Type 2, Type 2B, and Type 3 compensation.
The examples used for this seminar use in the buck regulator.
Bio: Prabal Upadhyaya was born in Kathmandu, Nepal, in 1979. He received the M.S. degree in electrical
engineering from University of Idaho. Currently, he is a principal application engineer at Alpha and Omega
Semiconductor, Inc. Previously he has held various positions at ROHM semiconductor, Intersil corporation
(since acquired by Renesas Electronics) and Cypress semiconductor.
2:00pm to 2:50pm: A Dive into Fixed Frequency and Constant ON-Time Control Architectures for
Abstract: Throughout the years various control architectures have been adopted by power engineers in order to
regulate the constant output voltage. Fixed frequency control techniques have dominated the market as the
workhorse for precise control under most load conditions. However, the demand for longer battery life and
improvements in efficiency at light loads creates a window of opportunity for hysteretic control and various
power saving control techniques. In this presentation, details on voltage mode, current mode and constant
On-Time architectures will be explained. Pros and cons for each architecture will be discussed along with
practical issues with feedback loop design, effect of parasitic elements and loop gain measurement.
Bio: Nassif Abijaoude is an applications engineer at On Semiconductor developing DC-DC products in the telecom
and consumer space. Prior to his recent work in the telecom market, he helped develop DC-DC products for the
computing sector. Nassif obtained his Bachelor of Science degree in Electrical Engineering from California
Polytechnic State University (SLO) in 2010. He also holds a Master’s Degree In Electrical Engineering from San
Jose State University.
3:00pm to 3:30pm: Break and Refreshments
3:30pm to 4:20pm: Multiphase Converters: Higher Powers, Lower Ripple, Faster Response
Abstract: Multiphase converters deliver more power to the load, but also increase performance by interleaving the
switching waveforms to lower ripple voltage. With more switching events, multiphase converters have more
opportunity to respond to fast transients, typical in microprocessor systems. This talk will introduce
multiphase buck converters, discuss popular control strategies, and address methods of current balance, a
typical challenge with these converters.
Bio: Doug Osterhout has worked in power electronics for over 20 years. He started at Celestica Power Systems
designing kilowatt ac-dc power supplies. In 2001, he switched industries to semiconductors where’s held various
positions at Micrel, ADI, and ON Semi. There he designed LED drivers, Intel CPU power, and offline converters.
For the last 2 years, Doug has been at Google working on consumer products.
4:20pm to 5:10pm: From OpAmps to MCU’s: Intro to Digital Control
Abstract: Learn how to transition from op-amp and comparator-based controller to digital microcontroller power
controllers. Digital control provides unique flexibility to tune the converter setpoints and parameters as a
function of load or any digital input. However, moving to digital control introduces its own set of challenges.
This talk will discuss the advantages of digital control, what to look for when selecting a microcontroller for
power, and how to translate continuous-time controllers into discrete-time digital controllers. Finally,
common pitfalls when implementing digital control will be discussed.
Bio: Dr. Michael Seeman is President and Founder of Eta One Power, Inc. Eta One Power develops advanced
simulation and optimization software focusing on increasing power density and efficiency of power supplies. He
has 15 years of experience in cutting-edge power conversion solutions using wide-bandgap technologies and
resonant converter architectures. He previously worked at Texas Instruments and two power electronics
startups in Silicon Valley. Michael received his S.B. from MIT and M.S. and Ph.D. from UC Berkeley. He is an IEEE
member and chair of the SF Bay Area PELS chapter.
4:20pm to 5:10pm: Q&A and Wrap-up