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Original question:

TPS53319 & TPS53353 Ripple Injection

TINA/Spice/TPS53319: Need TPS53319 Bode plots; is there a Tina simulation model for AC simulation?

Kellee Crisafulli
Prodigy 20 points
Part Number: TPS53319
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

We are using five of the TPS53319 chips in a new design; we started with Web bench and then moved to Tina for detailed simulations.  

I would like to create Bode plots to check stability, is there a Tina simulation model for AC simulation? 

We need some way to confirm the stability of our designs using the TPS53319 since Web Bench does not provide Bode Plots for this chip. 

Is the transient TINA model valid for AC simulation if we use a DC source to power and inject an AC source in the feedback loop?

Another issue: I am seeing a big differences between load transient simulations using web bench and Tina Spice (4x) difference.

Web Bench shows 13mV peaks at 10A and Tina SPICE shows 55mV peaks at 10A load transient. 

Any idea why this might occur (all parts appear to be the same in Tina and Web Bench). 

  • 0
    TI__Intellectual 2680 points
    Hi Kellee,

    TINA transient model is not compatible for AC simulation and unfortunately, we do not have an average simulation model for this device.

    Please see my comments below regarding your issue related to Load transient.

    1. Check if both schematics (Webench and TINA-TI) is configured for same input and output voltage.
    2. Both test benches should have same BOMs.

    Please let us know if you are still observing mismatch in two tools. Also, it will be very helpful if you can attach TSC file and snapshot of Webench simulation results.