SLVA833D October   2016  – May 2021 TPS2660 , TPS2662 , TPS2663

 

  1.   Trademarks
  2. 1 Surge Test (IEC 61000-4-5)
  3. 2 EFuse Solution for Surge Protection
  4. 3 EFuse Solution Schematic for Surge Protection
  5. 4 Circuit Performance for Surge Tests
  6. 5 EFT Test (IEC 61000-4-4)
  7. 6 EFuse Solution Schematic for EFT protection
  8. 7 Circuit Performance for EFT Tests
  9. 8 Power-Fail Test (IEC 61000-4-29)
  10. 9 EFuse Solution Schematic for Power-Fail Applications
  11. 10Circuit Performance for Power-Fail Tests
  12. 11EFT, Surge and Power-Fail Test Setup
  13. 12Conclusion
  14. 13References
  15. 14Revision History

1 Simplifying EFT, Surge and Power-Fail Protection Circuits in PLC Systems

The Programmable Logic Controller (PLC) system is usually connected to an external DC power supply to provide power to the controller unit, backplane and I/O modules. The input protection circuits are required to protect the PLC from various faults that may occur either on the field or the PLC side. Traditionally, discrete or semi-integrated circuits have been the solution and require a lot of external components to provide protection and to pass stringent electromagnetic compatibility (EMC) tests. Industry’s first high-voltage eFuse, the TPS266x devices, integrate all of the necessary functions required to simplify the complete protection needs. This application report describes how the TPS266x devices simplify protection circuits for the EFT, surge and power-fail requirements.