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PMBus® Conference & Expo

The 2018 PMBus® Conference & Exposition was held in Dallas on 11–12 September 2018. The presentations are available in the PMBus adopters area to logged-in adopters.

Presentation descriptions

1. Keynote: “Open Source: A history of and vision for PMBus”

Travis Summerlin, Texas Instruments

PMBus and the Power Management Bus Specification began as an idea to enable intelligence in power systems. It was kicked off at an event very much like this one in Dallas in 2005. In this keynote speech, Travis Summerlin talks about the original vision of the founders, the progress that PMBus has made since 2005, and the continuing vision to enable intelligence in power systems of today and tomorrow.

Bio: Travis Summerlin is the Design Director for Converter and Controller Products at Texas Instruments. For the past 12 years, he has been responsible for the design of semiconductor products to enable Point Of Load solutions including PMBus-enabled designs. Travis is a member of the Board of Directors of the System Management Interface Forum, the parent organization of the PMBus forum.

Beginning in 2012, he directed the PMBus Standards Working Group that released the new specification revisions PMBus 1.3 (2014), PMBus 1.31 (2015), SMBus 3.0 (2014), and SMBus 3.1(2018). Travis holds B.S. and M.S. degrees in Electrical Engineering from Clemson University and an EMBA degree from the University of Texas at Austin.

2. “PMBus Software Tools”

Richard Caubang, Artesyn Embedded Technologies

The first part of the presentation shows how PMBus is being applied in the industrial lighting market. We also show the web-tool we have made to aid our customers in configuring the front-end power supplies.

The second part of the presentation focuses on data center applications for front-end power supplies.

Bio: Richard Caubang of Artesyn Embedded Technologies is technical director for standard products focusing on data center front-ends. He has 20 years of experience in the power industry.

3. “PMBus AC/DC applications and adaption over various transport protocols”

Chris Jones, Artesyn Embedded Technologies

The first part of the presentation shows how PMBus is being applied in the industrial lighting market. We also show the web-tool we have made to aid our customers in configuring the front-end power supplies.

The second part of the presentation focuses on data center applications for front-end power supplies.

Bio: Chris Jones of Artesyn Embedded Technologies is a technical director for standard products focusing on the industrial and medical markets. His experience in the power industry spans over 35 years.

4. “Present and Future Roles of Digital Power Communications in Server Platforms”

Kris Dehnel, Intel

Digital communications in the power delivery infrastructure of servers has evolved to include extensive monitoring and control of basic quantities such as voltage, current, and temperature with the use of the standard PMBus protocol and commands. Now, the industry must decide if future functions such as manufacturing provisioning, runtime configuration, real-time debugging, and firmware/configuration memory update will be handled by PMBus over SMBus, or some other communications channel.

Bio: Kris Dehnel is a Senior Applications Engineer in the Intel Enpirion Power Products Organization. He has worked for 37 years in numerous roles providing power to computer and telecommunications products, with an emphasis on digital implementations and digital communications. He is named on three patents in power electronics, with others pending. Kris is currently the Intel representative to the PMBus Standards Working Group and 2018 Chair of the IEEE Central Texas Joint Chapter (PI)^2 (PES, PELS, IAS, IES).

5. “Standardized Configuration at Test”

Vivek Gani, Flex; Chris Eckhoff, Maxim Integrated Products; Michael Jones, Analog Devices

In order for the PMBus standard to grow, its vendors need to address customer pains that occur when using a mix of devices from multiple vendors.

One of these pains occurs in production configuration where customers and their contract manufacturers end up using multiple vendor-specific guidelines and toolchains.

This talk presents a solution to this problem by introducing a standardized configuration format and is seeking feedback and support from vendors.

Bio: Chris Eckhoff, P.E., has an EE degree from THE University of Texas. He has practiced engineering in precise timing systems as well as application engineering with AMD, Silicon Labs, Zilker Labs and Intersil. He is currently an application engineer with Maxim Integrated. Chris represents Maxim on the System Management Interface Forum board of directors. He has also been very involved with the PMBus Standards Working Group since 2013.

Bio: Michael Jones is Applications Engineering Section Head at Analog Devices. He is responsible for PMBus-based products. He is a regular contributor to the specification and roadmap activities of PMBus (Power Management Bus). Michael currently serves on the SMIF Board of Directors. His experience in the power electronics industry spans over 30 years in design, test, and application roles. Michael holds a BS in Electrical Engineering from California State University at Fresno and an MBA from the University of Denver.

6. “PMBus Application Profiles”

Oleg Volfson, Flex

The PMBus specification introduced the first open standard communication protocol specifically intended for power conversion, which standardized digital bus standards at the electrical and command/value levels.

The PMBus standard enabled the adoption of digital power solutions in the market place for continuously expanding range of products for over a decade. The next goal is to improve interoperability among vendors to ease the amount of support & software integration performed by the customers. To reach this goal, the PMBus Standards Working Group introduced the concept of Application Profiles containing focused command sets for specific product types. This paper describes this concept along with the examples of development of Application Profiles for isolated and non-isolated DC/DC Power Modules, Front End Power supplies, and other segments where interoperability is a key value proposition.

Bio: Oleg Volfson is working as an Applications Engineer for Digital Board-Mounted Power Supplies for Flex Power Modules. His background is Power Electronics and for the last 12 years he has been involved in development and applications of Digitally Controlled of DC/DC converters mainly for Telecom and Datacom products. He is an active contributor to PMBus Application Profile Working Group, and he also authored and presented several papers and a Professional Seminar at APEC, PCIM and Intelec.

7. “AVSBus Deep-dive”

Juan Arango, Texas Instruments

There was a time when power devices would turn on and operate for hundreds or thousands of hours in the same exact mode.

Market demands for power efficiency and temperature budgets for systems changed all of that. At first a static change through a parallel interface would make a one-time adjustment to the operating mode; then sporadic commands would change operation through a slow serial interface, typically I2C based. Later on demands for better optimization, efficiency, and thermal management demanded faster response times and created the need to gather accurate telemetry, challenging the capabilities of a shared serial bus.

The sophistication of modern systems requires voltage scaling with small latencies, and as the circuit designers improve switching times and control loops, the lag of serial communications can weigh heavy on a system’s power performance.

That is the environment PMBus’ AVSBus™ was developed for: Direct connectivity to a single device, avoiding the bus contention that sharing the serial link across several ones. When used with a clock rate of up to 50 MHz, it allows any single command to be sent within 640 ns, using a 2-wire connection.

This presentation covers some typical scenarios for the use of AVSBus, shows how AVSBus can be tailored to fit complex systems by working in full-duplex mode at high speed with a full complement of commands, but it can also be tailored to fit simple systems with very limited resources, at low speed and using just half-duplex communication.

The objective is to emphasize that AVSBus does more than simply change the target voltage. When set up for full-duplex communications, it allows a controller to get insight into the internal state of the power device and to read telemetry back. Additionally, full-duplex communications comes with the added benefit of the controller receiving confirmation that a command has been received and executed correctly.

Finally, the case is made for expanding AVSBus with the use of manufacturer-specific commands, and options for adding multi-slave support.

Bio: Juan Arango is a Member of Technical Staff at Texas Instruments, where for 19 years he has developed digital circuits for power management, codecs, serial communication interfaces and touch-screen controllers. Prior to that, he worked 10 years for EDS, developing applications for IBM and GM, among others.

He holds a M.S. in Computer and Information Science, and a B.S. in Electrical Engineering.

8. “Vision for AVSBus Evolution”

David Bates, STMicroelectronics

With the constant growth of high speed microprocessors, GPUs, FPGAs, and ASICs, a means for high speed efficient power management becomes more prevalent.

Allowing dynamic control and monitoring of the power subsystem enables optimized power utilization and savings. We briefly discuss the current AVSBus 1.0 adaptive voltage scaling interface, and look forward into the necessary evolution of the interface to offer a flexible, powerful ecosystem for high performance systems.

Bio: David Bates is the Regional Technical Marketing Manager at STMicrolectronics, with focus on server and data center computing power solutions. His background spans multiple years at AMD where he managed the hardware ecosystem development for all AMD platforms spanning multiple market segments including server and client. He has successfully driven the transition from parallel VID interfaces to serial interfaces for AMD processor-based platforms and co-authored the SVI2 (Serial VID Interface v2.0) specification which is prevalent in all AMD processors and GPUs today. David holds a B.S. degree in Electrical Engineering from the University of Texas at Austin.

9. “Profile Defined Software: How To Leverage Application Profiles to Create Reusable Software”

Michael Jones, Analog Devices

The PMBus Standards Working Group has released a set of Application Profiles. This presentation will explore the benefits of organizing software on the structure of Application Profiles. For key areas will be discussed: Compatibility of devices, code reuse, prevention of code misuse, and dealing with exceptions (non-compliant devices/commands). An argument will be made that a Profile-Defined Software Library based on Application Profiles will be an industry wide improvement in the current state of affairs.

Bio: Michael Jones is Applications Engineering Section Head at Analog Devices. He is responsible for PMBus-based products. He is a regular contributor to the specification and roadmap activities of PMBus (Power Management Bus). Michael currently serves on the SMIF Board of Directors. His experience in the power electronics industry spans over 30 years in design, test, and application roles. Michael holds a BS in Electrical Engineering from California State University at Fresno and an MBA from the University of Denver.

10. “Tips & Tricks: Working with Multi-Master PMBus Systems”

Peter Miller, Texas Instruments

As the availability of PMBus-enabled power regulators grows, and system designers learn to leverage an increasing variety of PMBus-enabled features, the complexity of these digital serial buses also increases. Many designers encounter system solutions that incorporate more than one device initiating traffic over a shared serial bus. Multi-master PMBus solutions are the perfect response to some design challenges, but out of uncertainty or fear of the complexity, many designers turn to solutions that avoid having multiple masters on the same bus.

Whether it’s separate telemetry and fault management, actively managed voltage scaling, or interfacing test, diagnostics and field upgradability into a design, the key to managing multi-master systems is managing communication on the bus.

In this presentation, we cover some of the complexities of managing a multi-master PMBus system, problems to avoid, and solutions to help system designers integrate multi-master capabilities into their PMBus-enabled systems.

Bio: Since earning his Masters in Electrical Engineering from Worcester Polytechnic Institute in 2002, Peter Miller has worked in TI’s Power Business Unit in Customer Applications Support, IC Design and product definition and development supporting a range of Analog and PMBus-enabled power solutions. He has been involved in the development of dozens of TI’s power products, and assisted in thousands of designs. Peter has volunteered with the PMBus Standards Working Group since 2015.

11. “PMBus Roadmap”

Chris Eckhoff, Maxim Integrated Products

Bio: Chris Eckhoff, P.E., has an EE degree from THE University of Texas. He has practiced engineering in precise timing systems as well as application engineering with AMD, Silicon Labs, Zilker Labs and Intersil. He is currently an application engineer with Maxim Integrated. Chris represents Maxim on the System Management Interface Forum board of directors. He has also been very involved with the PMBus Standards Working Group since 2013.

Schedule

Tuesday, September 11
7:00–8:00am Buffet Breakfast
8:30–9:15am Keynote speech
Travis Summerlin, Texas Instruments (& Chairman of the Board, PMBus/SMIF)
9:15–10:45am System presentation: AC/DC applications (outside of Server)
Chris Jones, Artesyn
Richard Caubang, Artesyn
10:45–11:00am Break
11:00–12:00am System presentation: Present and Future Roles of Digital Power Communications in Server Platforms
Kris Dehnel, Intel Enpirion Power Products Organization
12:00am–1:00pm Deep-Dive: PMBus Standard Configuration File Format & Demonstration
Chris Eckhoff, Maxim Integrated
Vivek Gani, Flextronics
Mike Jones, Analog Devices
1:00–2:00pm Catered Lunch
2:00–3:00pm Deep-Dive: Application Profiles review
Oleg Volfson, Flex
3:00–4:00pm Deep-Dive: AVSBus™
Juan Arango, Texas Instruments
4:00–4:15pm Break
4:15–4:45pm Vision for AVSBus Evolution
David Bates, STMicroelectronics
4:45-5:15pm How to Session 1: Code tips & tricks
Mike Jones, Analog Devices
5:15-5:45pm How to Session 2: Multi-mastering
Peter Miller, Texas Instruments
5:45–6:30pm Break
6:30–8:30pm Development Tool Expo & Dinner
Wednesday, September 12
7:00–8:00am Buffet Breakfast
8:30–9:00am PMBus roadmap presentation
Chris Eckhoff, Maxim Integrated
9:-00–10:30am Round Table discussion: OEMs & semiconductor vendors
Chair: Travis Summerlin, Texas Instruments (& Chairman of the Board, PMBus/SMIF)
10:30am–12:00pm Round Table discussion: Development tools vendors
Chair: Todd Hendrix, Cleaner Marketing (& marketing Consultant to PMBus/SMIF)

FEATURED EVENT
APEC March 17–21, 2019
Anaheim, CA


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