Microchip DS70320B SMPS AC/DC Reference Design User Guide

About this manual

This guide explains how to use the Microchip SMPS AC/DC reference design, including system specifications, block diagrams, hardware and software design, and system operation. It provides detailed information on the PFC boost converter, full‑bridge ZVT converter, single‑phase and three‑phase synchronous buck converters, and auxiliary power supplies.

The document also includes appendices with board layout and schematics, test results such as soft‑start, output ripple, input current THD and power factor, and a list of reference materials. Warranty registration instructions and links to Microchip support resources are provided. This manual is written in Chinese.

What's inside

• Introduction
• Hardware Design
• Software Design
• System Operation
• Appendix A – Board Layout and Schematics
• Appendix B – Test Results
• Appendix C – References

Frequently asked questions

How do I register the warranty for the reference design?

Fill out the included Warranty Registration Card and mail it promptly to receive product update information.

Where can I obtain the latest software version for this design?

Visit the Microchip website (www.microchip.com) to download the latest software releases.

What is the document number for this reference design?

The document number is DS70320B_CN.