SLLA618 October   2023 ATL431 , ATL431LI , TL431 , TL431LI , TLVH432

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Designing for SSR With a Shunt Reference
    1. 2.1 Setting the Output Voltage
    2. 2.2 Biasing a Shunt Reference
    3. 2.3 Designing for Transient Response
  6. 3Power Considerations
  7. 4Methodology
    1. 4.1 Shunt Reference Implementation
    2. 4.2 Accuracy Comparison
    3. 4.3 Power Consumption Comparison
    4. 4.4 Transient Response Comparison
  8. 5Results
  9. 6Summary
  10. 7References

6 Summary

This application note explained the key shunt reference specs and their impacts on the performance of SSR in a flyback converter. The process for implementing a shunt reference into the SSR feedback network was explained in detail, including how one can set the flyback converters output voltage, and bias the shunt reference. The performance of the TL431, TLVH432, ATL431,TL431LI, and the ATL431LI were analyzed, and a conclusion was created for which shunt reference had the best performance for accuracy, power dissipation, and transient response.