SDAA253 January   2026 TPSI2240-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Insulation Monitor
  5. 2Detailed Description
    1. 2.1 Solving for the Unknown Isolation Resistances
    2. 2.2 Addressing Large Time Constant Cases
    3. 2.3 Prediction Algorithms
    4. 2.4 Understanding Error Sources
    5. 2.5 Test Results
  6. 3Summary
  7. 4References

3 Summary

This application note discusses the key design considerations for a resistive-bridge insulation monitor based on TIDA-010985. The key design challenge discussed here is how to address large Y-cap applications while considering the trade-offs. The current design is able to support up to 9µF with the help of a novel predictive algorithm software. For more information on the TIDA-010985 IMD reference design and design resources, please visit ti.com.