SLVSLK0 May   2026 TPSI8830

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Configurable Fault Response Timer (TMR)
        1. 8.3.1.1 Fault Latch-OFF
        2. 8.3.1.2 Fault Auto-Retry
      2. 8.3.2 Over-Current Protection (OCP)
      3. 8.3.3 Thermal Shutdown
      4. 8.3.4 Zero-Cross Turn On
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Thermostat
      2. 9.2.2 System Level Testing
      3. 9.2.3 Design Requirements
      4. 9.2.4 Detailed Design Procedure
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 EMI Considerations
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

9.2.4 Detailed Design Procedure

TPSI8830 Typical Application DiagramFigure 9-2 Typical Application Diagram

When the TPSI8830 turns on, an inrush current flows through the device for a short duration. Selecting the variant with the desired minimum OCP threshold establishes a false trip does not occur during the initial inrush.

When the switch is turned off, inductive loads causes a voltage spike. The avalanche capability of the device's integrated MOSFETs is limited, and they can only survive a few tens of millijoules of total avalanche energy. It is therefore recommended to place a TVS diode, MOV, or other clamping circuit across the S1 and S2 terminals when driving large inductive loads. The device or clamping circuit must dissipate the energy stored in the load at peak current during each cycle.

During a fault condition, such as a short circuit, the TPSI8830 or an external clamping circuit must dissipate the energy stored in the system's inductance (such as long wires or the magnetizing inductance of a 24VAC transformer). If the device is configured to use the auto retry functionality with the TMR pin, select an appropriate retry time to establish that heat that dissipated during avalanche did not damage the clamping circuit nor the TPSI8830.