SLYY063A October   2014  – May 2026 ISO5451 , ISO5452 , ISO5851 , ISO5852S , ISO6420 , ISO6421 , ISO6441 , ISO6463 , ISO7810 , ISO7820 , ISO7821 , ISO7830 , ISO7831 , ISO7841 , ISO7842 , ISOW1050 , ISOW3080 , ISOW6441 , UCC5310 , UCC5320 , UCC5350 , UCC5390

 

  1.   1
  2.   FAD
  3.   Understanding the definitions of high-voltage isolation parameters, their relevance to real applications, and the methodologies used to test them, allows systems engineers to pick the right isolator for their design need.
  4.   Maximum transient isolation voltage and isolation withstand voltage
  5.   Maximum repetitive peak voltage and working voltage
  6.   Maximum surge isolation voltage
  7.   Comparative tracking index
  8.   Distance through insulation
  9.   Conclusions
  10.   References
  11.   Appendix

Conclusions

The high-voltage isolation performance of an isolator is quantified with different parameters, which represent the isolator’s capability to handle high-voltage stresses of different magnitude and transient profiles. Various component-level standards define these parameters and the methodologies to test them. This white paper discusses in detail the definitions of these parameters, their relevance to real-life system scenarios, and describes how they are tested and certified.

Results from tests on TI’s ISO7842 reinforced digital isolator, performed according to standard procedures, are presented. This device meets the transient overvoltage and surge requirements for reinforced isolation at both the component and system level, and enables reliable operation for many years in the presence of continuous, high-operating voltage. The test results demonstrate that this device marks a significant leap in TI’s capacitive high-voltage isolation capabilities, and at the same time delivers industry-leading, high-voltage performance.

(Product Update: ISO78xx is a previous generation digital isolator. For new designs, we recommend ISO64xx, a next-generation, pin-to-pin compatible, reinforced digital isoaltor with improved timing and EMC performance. For board space optimization and ease of design with best EMC the recommended part for Signal Isolators with Integrated Power is ISOW64xx, ISOW3080, ISOW1050. )