TIDUFG5 December   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Insulation Monitoring
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 TIDA-010985 Overview
      2. 2.2.2 Solving for the Unknown Isolation Resistances
      3. 2.2.3 Addressing Large Time Constant Cases
      4. 2.2.4 Prediction Algorithms
      5. 2.2.5 Understanding Error Sources
    3. 2.3 Highlighted Products
      1. 2.3.1 LP-MSPM0G3507
      2. 2.3.2 TPSI2240-Q1
      3. 2.3.3 RES60A-Q1
      4. 2.3.4 TLV9002-Q1
      5. 2.3.5 TPSM33620-Q1
      6. 2.3.6 TPS7A2033
      7. 2.3.7 ISOW1044
      8. 2.3.8 TSM24CA
      9. 2.3.9 TLV431B
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software
    3. 3.3 Test Setup
      1. 3.3.1 Hardware Test Setup
      2. 3.3.2 Software Test Setup
    4. 3.4 Test Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
    2. 4.2 Tools and Software [Required Topic]
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Authors

1.2 Key System Specifications

Table 1-3 Key UL 2231-2 , IEC 61851-23 Specifications
PARAMETER UL 2231-2 / IEC 61851-23 SPECIFICATION TIDA-010985
Trip Accuracy (symmetrical and asymmetrical faults) 15% 5%
Response time <10 seconds < 2 seconds (Ciso = 4µF, Riso = 1MΩ)
Line to PE Voltage Variation % of VDC 10% 10% (that is, 50V for 1kV bus)
Table 1-4 Key Electrical Specifications
PARAMETER SPECIFICATION Unit
Riso Measurement Range (maximum tested) 2 MΩ
Riso Measurement Error (3σ) ±5 %
Ciso Measurement Range (maximum tested) 9 µF
Ciso Measurement Error (3σ) ±15 %
Isolation Measurement Cycle Time (configurable) 2 s
HV Bus Voltage (maximum) 1000 V
ADC Full Scale Input 3.3 V
Voltage Divider Resistance 12.5 ±15% MΩ
IMD Leakage Current (maximum, active) 2 mA
IMD Leakage Current (maximum, inactive) 100 µA
Resistive Bridge Power Dissipation (maximum) 0.85 W
Power Supply 6-36 or Isolated USB to LP V
Power Consumption (maximum) 2 W
Operating Temperature -40 to 85 °C
Interface CAN 2.0 N/A