SLVAG06 March   2025 TPS40210 , TPS40210-Q1 , TPS40211 , TPS40211-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Primary Side Regulation (PSR)
  6. 3Secondary Side Regulation Implementation
    1. 3.1 Common Implementation Feedback for Secondary Side Regulation
    2. 3.2 Implementing Feedback for Secondary Side Regulation
  7. 4Simulation Results
  8. 5Practical Bode Plot Comparison
  9. 6Summary
  10. 7References

2 Primary Side Regulation (PSR)

For PSR flyback regulation, there are three methods to perform output voltage sensing. The first method is to sense the primary side switching node. The second method is to directly sense the third or auxiliary winding voltage. The third method is to sense the third or auxiliary winding rectifier voltage. The first two methods require primary controller device support. The third method is the most popular. Figure 2-1 shows the block diagram. For PSR control, the device must integrate the error amplifier. Otherwise, an external reference and amplifier is required. Make sure to follow required parameters. See Creating a Primary-Side Regulation Flyback Converter using a Conventional Boost Controller for more information.

Primary Side Regulation Block Diagram Figure 2-1 Primary Side Regulation Block Diagram