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TPS62812-Q1: TPS62812-Q1 PSpice simulation

Matteo Rinaldi
Prodigy 10 points
Part Number: TPS62812-Q1

Hello

I simulate the TPS62812-Q1 using PSpice for TI in order to generate a 3.3V and simulate a load transient.

From the simulation seems that the converter isn't stable in steady state condition but I followed the dataseet indication for all the external parts.

Could you check please if there is an error in my simulation ?

Attached you can found a pdf with schematic and waveform result.

TPS62812Q1 PSpice simulation.pdf

Thanks and Best Regards

Matteo

  • 0
    TI__Genius 16150 points

    Hi Matteo,

    The input voltage set for quite frequent that's the reason output voltage oscillating lot. I would suggest to increase supply pulse width higher to see device performance.

    Schematic looks according to datasheet recommendation and I don't see critical issue there. 

    Best regards,

    Tanvee

  • 0 in reply to Tanvee
    Prodigy 10 points

    Hello Tanvee

    After different trials, I verify that the issue is the maximum step size in the transient options.

    The previous simulation was done with a maximum step size of 50ns, but reducing it the simulation is more accurate but require more time.

    Attached the result with a maximum step size of 0.5ns, there are no oscillation in the output voltage at steady state.

    TPS62812Q1 PSpice simulation 2.pdf

    Best Regards

    Matteo

  • +1 in reply to Matteo Rinaldi
    TI__Genius 16150 points

    Hi Matteo,

    Thanks for sharing the details.

    Simulation results look okay to me.

    Best regards,

    Tanvee