The Software Frequency Response Analyzer (SFRA) is one of several tools included in the powerSUITE Digital Power Supply Design Software Tools for C2000™ Microcontrollers. The SFRA includes a software library that enables developers to quickly measure the frequency response of their digital power converter. The SFRA library contains software functions that inject a frequency into the control loop and measure the response of the system using the C2000 MCUs’ on-chip analog to digital converter (ADC). This process provides the plant frequency response characteristics and the open loop gain frequency response of the closed loop system. The user can then view the plant and open loop gain frequency response on a PC-based GUI. All of the frequency response data is exported into a CSV file, or optionally an Excel spreadsheet, which can then be used to design the compensation loop using the Compensation Designer.
Maintained version of the library is available in the C2000Ware-DigitalPower-SDK. To get started using the SFRA in your own design, refer to “Chapter 2: Installing the SFRA Library” of the User’s Guide.
Older version with floating point support is available in controlSUITE , see User’s Guide.
The Software Frequency Response Analyzer GUI can be invoked in two ways:
| Type | Title | Date | |
|---|---|---|---|
| User guide | C2000™ Software Frequency Response Analyzer (SFRA) Library User’s Guide (Rev. A) | Jun. 26, 2019 | |
| Technical article | Fast Current Loop performance: better than we thought, and measurable in your own lab | Jun. 19, 2018 | |
| Technical article | Digital power control advances GaN PFC design | Apr. 12, 2018 | |
| Technical article | The power of a GUI simplifies the design of digital power factor correction | Oct. 13, 2015 | |
| Technical article | Simplifying the software development for digital power factor correction design | Sep. 29, 2015 | |
| User guide | C2000 Software Frequency Response Analyzer (SFRA) Library & Compensation Des UG (Rev. A) | Jan. 20, 2015 |
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