• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

Power Electronic Tips

Power Electronic News, Editorial, Video and Resources

  • Products
    • Power Supplies
    • AC-DC
    • DC-DC
    • MOSFETS
    • Power Management
    • Battery Management
    • RF Power
    • Resistors
    • Capacitors
    • Magnetics
    • Transformers
  • Applications
    • LED Lighting
    • Rack Mount
    • Wireless
  • EE Forums
    • EDABoard.com
    • Electro-Tech-Online.com
  • EE Learning Center
  • Video
    • EE Videos
    • TI Power Videos
    • Teardown Videos
  • Resources
    • Design Fast
    • eBooks / Tech Tips
    • FAQ
    • LEAP Awards
    • Podcasts
    • Webinars
    • White Papers

Reference design lets secondary MCU control primary power

January 6, 2021 By Redding Traiger Leave a Comment

In modern offline AC-DC power solutions, programmability and adaptive control offer the flexibility and intelligence needed by smart home devices to better interface with their power systems. In these systems, a secondary side microcontroller (MCU) is typically not capable of starting a system without the use of a separate bias power supply. A new reference design from Microchip Technology Inc. solves this problem using the MCP1012 high voltage auxiliary AC-DC controller, demonstrating the ability to remove the independent bias power supply in many applications. The MCP1012 offline auxiliary device enables the system to transfer control of the power and duty cycle to a secondary MCU. The control between the system and the load can be more precise and purposefully coupled, through a design that can be simplified, reducing size and cost.

The reference design uses a patented isolation technique for isolated feedback. This patented isolation technique called Inde-Flux transformer technology is being licensed to Würth Elektronik eiSos. Inde-Flux technology is used in the Inde-Flux Transformer (Part Number 750318659), the first transformer made by Würth Elektronik eiSos using this IP and sold as part of Microchip’s 15W MCP1012 offline reference design. This transformer combines the signal power and signal communication into one device, eliminating the need for optical feedback or an independent signal transformer. The option is also available to use more traditional approaches with a planar pulse transformer on the reference design, as well as the ability of the design to work with more traditional optocouplers and signal transformers. The secondary-side control is then enabled through a combination of the transformer and Microchip’s newly released MCP1012 AC-DC controller along with the SAM D20 series 32-bit MCU.

The MPC1012 primary-side auxiliary controller provides for system startup, gating, and protecting an offline flyback converter for the secondary MCU. The device enables a range of benefits such as direct measurement and active regulation of voltage and/or current, high loop bandwidth by direct loop closure, and simplified communication for load-referenced systems.

The 15W MCP1012 offline reference design provides the principal working elements for a 15W offline power design with the necessary firmware to enable the elimination of the auxiliary power supply on the primary side. This can reduce the complexity of the system including eliminating the need for optocouplers in many applications such as appliances and smart speakers. This Inde-Flux transformer technology, in cooperation with Würth Elektronik eiSos, can be scaled to standard and custom transformer designs for different voltages and power levels as needed.

The 15W MCP1012 offline reference design includes a user guide and comes with schematics and bill of materials, design files, firmware, and a demonstration unit. Microchip also offers a fundamental 1W evaluation board, the DT100118, for the MCP1012 AC-DC controller.

The 15W MCP1012 offline reference design, part number EV37F82A, is available now for $225.00 each. The DT100118 1W reference design is available now for $115.00 each. The MCP1012-V/EKA is available now starting at $.40 each in 5,000-unit quantities.

You may also like:

  • thermal management
    Basic principles of thermal management
  • AC motor drives
    The basics of AC motor drives and controllers
  • testing power consumption
    Testing power consumption and batteries for wireless IoT nodes and…
  • software configurable power systems
    Benefits of software-configurable power systems
  • digital power
    Digital power conversion – how does that work?
  • wireless IoT sensor nodes
    Power conversion considerations for wireless IoT nodes and wearables, Part…

  • HVDC transmission system architectures and use cases

  • Over a century of high voltage DC power transmission
  • PVs
    Solar systems’ maximum power point trackers

Filed Under: AC-DC, Controllers, Development Tools, Power Components, Power Management, Reference design Tagged With: microchiptechnologyinc

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Primary Sidebar

DesignFast

Component Selection Made Simple.

Try it Today
design fast globle

Subscribe to our Newsletter

The Power Electronic eNewsletter delivers breaking electronic and power component news, resources, product innovations and more.

Subscribe today

Test & Measurement Handbook


EE TRAINING CENTER CLASSROOMS

“ee

“ee

“ee

“ee

RSS Current EDABoard.com discussions

  • What temperature sensor is in 852A?
  • Designing an offline hardware Password Manager
  • Offline SMPS for 120W maximum in EU, UK, USA ..but with no PFC stage
  • 2kW Step-down PWM converter for high voltage dc-BUS
  • Start-up resistor for offline flyback suffers overvoltage..but is it OK?

RSS Current Electro-Tech-Online.com Discussions

  • Goldine International Leading Electronics brand from USA offering for new Distributors
  • Array of pointers to 16 series port SFRs.
  • The popups are getting ridiculous.
  • new to Ardunio but trying to compile
  • GLCD PIC16F877 lack of character output Issue

Follow us on Twitter

Tweets by PowerElectrTips

Footer

EE World Online Network

  • DesignFast
  • EE World Online
  • EDA Board Forums
  • Electro Tech Online Forums
  • Connector Tips
  • Microcontroller Tips
  • Analog IC Tips
  • Sensor Tips
  • Test and Measurement Tips
  • Wire and Cable Tips
  • 5G Technology World

Power Electronic Tips

  • Subscribe to our newsletter
  • Advertise with us
  • Contact us
  • About us
Follow us on TwitterAdd us on FacebookFollow us on YouTube Follow us on Instagram

Copyright © 2021 · WTWH Media LLC and its licensors. All rights reserved.
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media.

Privacy Policy