SLLA334B August   2018  – September 2022 ISO1050 , SN6501

 

  1.   Isolated CAN Solution by Using ISO1050 and SN6501
  2.   Trademarks
  3. 1Introduction
  4. 2Capacitive Isolation Technology
  5. 3Isolated CAN Module Design
    1. 3.1 Transformer Driver
    2. 3.2 5-V to 5-V Isolated Power Design Consideration
    3. 3.3 PCB Design
  6. 4Experiment Validation
  7. 5Conclusion
  8. 6References
  9. 7Revision History

5 Conclusion

An isolated CAN module reference is discussed in this application report. A designer can easily complete a compact, high-reliability, low-cost 5-V to 5-V isolated power by using SN6501 and a few external components. In place of the ISO1050, ISO1042 can also be used as a performance upgrade. Detailed design consideration of how to select LDO and calculate appropriate transformer turn ratio is presented. Meanwhile, Pspice simulation is used to validate the theoretical calculation. Finally, the maximum bus loading (167 nodes) and highest data rate (1 Mbps) is achieved in a set of experiments to demonstrate the robustness of the isolated CAN module.For a comparison between this discrete solution and an integrated power and isolated CAN solution, please read How to Isolate Signal and Power in Isolated CAN Systems