Tuesday, November 21st 2017, Lyon, France

Join ST and Würth Elektonik workshop to learn how to design an efficient offline auxiliary power supply for low-medium output power with proper component selection.

STMicroelectronics & Würth Elektronik invite you to this hands-on workshop that will examine the theory, component selection and PCB layout to ensure the best design for the following topologies:

  • Low-power buck topology for mains applications
  • Medium-power quasi-resonant flyback topology for power converters

Discover how eDesignSuite, ST’s easy-to-use on-line design tool, helps you rapidly select and determine the optimal configuration for your power management design; reducing your final cost and improving your time to market.

Benefits you will take away

  • Technical overview of buck and quasi-resonant flyback topologies
  • Live session using eDesignSuite to analyze the impact of various components on circuit voltages and currents to determine the best design for your application
  • Live session using an oscilloscope to observe waveforms in real-time to study circuit voltages and currents and how they affect your application
  •  Tips and tricks to ensure the best PCB layout for your application

There is no charge to participate in this event, but you must register through my.st.com.

If you already have a myST account, REGISTER here.

If you do not have a myST account, click here to create your account and register.


  • Technical English and basic knowledge of electronic systems and devices
  • Please bring your laptop (Wi-Fi capable) with Microsoft Excel or compatible software installed
  • It is recommended to create your eDesignSuite account before the workshop to save time.


8:30 Registration
8:45 Introduction
9:00 Buck and flyback topology for mains applications in auxiliary supplies
VIPer introduction: ST’s family of offline monolithic converters
How to select other power components (diodes, protection ICs, etc.)

Live session: eDesignSuite for easy design

  • Typical drain-source voltage 
  • Inductor and transformer parameters that impact drain current 
  • Continuous vs. discontinuous mode 
  • Impact of different diodes
Tips and tricks for a high-quality, cost-effective PCB layout
10:30 Coffee break
10:45 Power inductors for high-voltage buck converters
Inductors with guaranteed high-voltage rating – technology and testing
Input EMI filters

Hands on session: eDesignSuite with Viper01/6 fixed-frequency high-voltage converter

  • Buck converter design 
  • Flyback converter design 
Open discussion about design issues and solutions
12:30 Lunch
13:45 Design considerations for quasi-resonant flyback converters
Benefits of ST’s new STCH02 quasi resonant controller for medium power converters
How to select other power components (main switches, diodes, protection ICs, etc.)

Live session: Using oscilloscope waveforms to better understand

  • Drain-source voltage – reflected voltage and leakage inductor spikes 
  • Quasi-resonant zero-voltage switching on drain-source voltage
  • Drain current – Peak current independence on input voltage
  • Secondary current (how it is complementary to primary) 
Tips and tricks for a high-quality, cost-effective PCB layout
15:15 Coffee break
15:30 Transformers for flyback converters
Getting the most out of EMI filters for flyback converters
16:15 Hands-on session: Quasi-resonant flyback design with STCH02
Open discussion about design issues and solutions
16:45 Conclusions & Summary

Location and date

City Date Status
Lyon, France           November 21, 2017        Open