SLVAEZ0 November   2020 TPS1H000-Q1 , TPS1H100-Q1 , TPS1H200A-Q1 , TPS1HA08-Q1 , TPS1HB35-Q1 , TPS2H000-Q1 , TPS2H160-Q1 , TPS2HB16-Q1 , TPS2HB50-Q1 , TPS4H000-Q1 , TPS4H160-Q1

 

  1.   Trademarks
  2. 1Background
    1. 1.1 High-Side Switch
    2. 1.2 Thermal Modeling Using Electrical Analysis
    3. 1.3 Varying RDSON
  3. 2Using TI's SPICE Models With Incorporated Thermal Behavior
    1. 2.1 Basics of PSpice - Modifying Components
    2. 2.2 Basics of PSpice - Adding Libraries and Components
    3. 2.3 Basics of PSpice - Running Simulations
  4. 3Simulating the Junction Temperature in PSpice
  5. 4How to Leverage Thermal Simulations
  6. 5Model Limitations
  7. 6Conclusion

3 Simulating the Junction Temperature in PSpice

With PSpice and TI's HSS models, devices that have the thermal behavior implemented will follow the calculations in the Background section. Once the schematic and operation of the device is ready to be simulated, the simulation profile should be configured with at least the settings shown in Table 3-1:

Table 3-1 Settings Recommended for Thermal Behavior Simulations

Analysis Type

Time Domain (Transient)

Start Saving Data After

0 (if not a long scale)

1E-9 (if a log scale is desired)

The simulation, if successful, will export its results and open in PSpice simulator.

The junction temperature will need to be added as a plot to get a full picture of the thermal behavior over time. To do this, add a plot which can be found in Trace > Add Trace > V(J). An example is shown in Figure 3-1:

GUID-2CD3BA57-A784-4F18-BFED-FA4EBF780B1A-low.pngFigure 3-1 Adding Junction Temperature Plot in PSpice Simulator

This will plot the junction temperature of the device as a plot trace in units of V having a 1:1 conversion to C
(25 V is equal to 25°C). Figure 3-2 shows an example of the plot.

GUID-67B94CAA-2F74-4D1D-B523-AC7A694F4E1A-low.pngFigure 3-2 Showing Junction Temperature Plot in PSpice Simulation Results