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Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power

Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power

New AC-DC controller plus Inde-Flux™ transformer technology licensed to Würth Elektronik eiSos simplifies design, reducing size and cost

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. (Nasdaq: MCHP) 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 start up, 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 combination of our Inde-Flux technology in a Würth Elektronik eiSos transformer, our MCP1012 AC-DC controller and our SAM D20 series 32-bit MCU creates a unique solution to offline power management,” said Rich Simoncic, senior vice president of Microchip’s analog, power and interface business unit. “These devices enable a simpler, more reliable implementation of complex bi-directional communication between the primary and secondary elements used in many isolated applications utilizing offline power. Where this solution is used in systems with a secondary MCU, customers can realize up to 60% savings of the bias supply area and reduce the bias supply bill of materials costs by $3 or more.”

Development Tools

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.

2021010702 / 07.01.2021 / Various / Microchip Technology Inc. /

Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power
Power Control Reference Design Enables a Secondary Side Microcontroller to Control Primary Power
New AC-DC controller plus Inde-Flux™ transformer technology licensed to Würth Elektronik eiSos simplifies design, reducing size and cost
.....
Microchip Adds 64 Mbit Parallel SuperFlash® Memory to its Family of Radiation-Tolerant COTS-Based Devices for Space Systems
Complements company’s COTS-based processors and communication interfaces to streamline development of space-qualified and scalable total system solutions
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Microchip Adds 64 Mbit Parallel SuperFlash® Memory to its Family of Radiation-Tolerant COTS-Based Devices for Space Systems 
Microchip’s Low-Power Radiation-Tolerant (RT) PolarFire FPGA is Available in Engineering Silicon and On a Path to Full QML Class V Spaceflight Qualification
Microchip’s Low-Power Radiation-Tolerant (RT) PolarFire FPGA is Available in Engineering Silicon and On a Path to Full QML Class V Spaceflight Qualification
Customers can prototype with the same FPGA silicon and package that is now headed for space qualification
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Microchip Delivers First 8-bit MCU Family for CAN FD Networks
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Microchip Delivers First 8-bit MCU Family for CAN FD Networks
World’s First Safety Certified Capacitive Touchscreen Controller Family
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First Cryptographic Companion Device Brings Pre-programmed Security to the Automotive Market
Microchip’s new TrustAnchor device provides OEMs and their module suppliers with a simplified path to automotive network security, reducing costs and time to market
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First Cryptographic Companion Device Brings
Microchip Extends Leadership in Data Center Connectivity with Industry’s Lowest Latency PCI Express 5.0 and CXL 2.0 Retimers
Microchip Extends Leadership in Data Center Connectivity with Industry’s Lowest Latency PCI Express 5.0 and CXL 2.0 Retimers
XpressConnect retimers cost-effectively triple high-speed signal reach
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Microchip and Innovium Deliver Industry’s Highest-Density Secured Ethernet Switching Solution for Hyperscale Data Centers and Telecom Service Providers
Demonstrated interoperability between industry’s highest-capacity Ethernet PHY from Microchip and Innovium’s widely adopted Ethernet switch
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Microchip and Innovium Deliver Industry’s Highest-Density Secured Ethernet Switching Solution for Hyperscale Data Centers and Telecom Service Providers
Microchip’s High-Performance FPGA is First of its Kind to Achieve QML Class V in Ceramic Quad Flat Package
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RTG4™ FPGAs offer a unique combination of radiation hardening by design, qualification to QML Class V and packaging that simplifies board design, inspection and assembly
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Automotive Electronics Council (AEC)-Q101-qualified devices targeted at helping electric vehicles achieve the highest levels of reliability and ruggedness
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Microchip Releases Newest Generation of AEC-Q101 Qualified 700 and 1200V Silicon Carbide (SiC)
Microchip Acquires High-Level Synthesis Tool Provider LegUp to Simplify Development of PolarFire FPGA-based Edge Compute Solutions
Microchip Acquires High-Level Synthesis Tool Provider LegUp to Simplify Development of PolarFire FPGA-based Edge Compute Solutions
Software engineers can now map applications coded in C/C++ directly into PolarFire FPGAs and SoCs that are the industry’s lowest-power mid-range fabric solutions for acceleration
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Industry’s First Highly Integrated Radiation-Hardened Motor Controller Consolidates Essential Functions for the Motor Control and Position Sensing Circuitry of Satellite Elements into a Single Chip
Microchip’s LX7720 device increases reliability while reducing weight and board area
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Industry’s First Highly Integrated Radiation-Hardened Motor Controller Consolidates Essential Functions for the Motor Control and Position Sensing Circuitry of Satellite Elements into a Single Chip
Microchip Announces Microcontrollers that
Microchip Announces Microcontrollers that Solve Tough Analog System Design Challenges
Adds MCUs that integrate configurable analog and digital peripherals supported by mixed-signal development environment
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Microchip Technology Introduces Its First Trust&GO Wi-Fi 32-bit MCU Module with Advanced Peripheral Options
Pre-provisioned for market-leading cloud platforms, the all-in-one WFI32E01PC Trust&GO solution delivers powerful MCU functionality and verifiable identity
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Microchip Technology Introduces Its First Trust&GO Wi-Fi 32-bit MCU Module with Advanced Peripheral Options 
Microchip Revs Up Motor Control Support with
Microchip Revs Up Motor Control Support with New Devices and an Expanded Design Ecosystem
Company further simplifies system development with products, tools, a torque-maximizing algorithm and additions to industry’s broadest offering of motor control reference designs
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Microchip Unveils First Low-Power Digital-to-Analog Converter (DAC) that Simplifies Handheld Designs by Including Nonvolatile Memory
Octal 12-bit DAC combines nonvolatile memory with an integrated reference voltage to eliminate processor overhead during power-up while enabling smaller, space-constrained systems
.....
Microchip Unveils First Low-Power Digital-to-Analog Converter (DAC) that Simplifies Handheld Designs by Including Nonvolatile Memory
New PIC24F MCUs Feature Low-power Animated Display Driver for Battery-powered Devices 
New PIC24F MCUs Feature Low-power Animated Display Driver for Battery-powered Devices
Low-power MCU family offers power-saving peripherals, hardware safety and secure code protection
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Microchip Introduces No-Cost, License- and Royalty-Free Ensemble Graphics Toolkit to Speed Linux Graphical User Interface Development
GUI toolkit for Linux enhances 32-bit microprocessor capabilities for low- and mid-range- resolution graphical displays
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Microchip Introduces No-Cost, License- and Royalty-Free Ensemble Graphics Toolkit to Speed Linux Graphical User Interface Development 
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