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Original question:

TPS7B87-Q1: Cadence Pspice simulation error (ORPSIM-15142): Node X_U1.V_FBK is floating

TPS7B86-Q1: Status of new pspice model for TPS7B8750

Olivier DOUSSIN
Prodigy 10 points
Part Number: TPS7B86-Q1

Tool/software:

Hello, in Q" 2025 I have today the same issue than observed one year and half. I have V_FBK floating error during simulation on TPS7B8750.

When updated pspice model will be released please?

A parallel question, is there any model for TPS7B8650 please? Today it seems that there is only model for adjustable output version. am I right ?
Otherwise please can you help me to find model of TPS7B8650 ?

Thanks

regards,

Olivier

  • 0
    TI__Genius 13440 points

    Hi Olivier,

    My apologies - a fix for the model issue with TPS7B8750 is still in progress, but we don't have a timeline for its release at present. 

    For the TPS7B8650, we currently only have the SPICE model for the adjustable TPS7B8601-Q1 available. The fixed output versions can be modeled using the adjustable model with the following feedback resistor values: 

    TPS7B8633-Q1 - Rt = 2Meg, Rb = 490.6k
    TPS7B8650-Q1 - Rt = 2Meg, Rb = 298.9k

    Best Regards,

    Alex Davis