• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 48 subscribers
  • Views 243 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

TLV9002: Issue with spice model

TLV9002: Availability of TLV90xxS SPICE models

Luc Does
Prodigy 10 points
Part Number: TLV9002

Hi,

I'm looking for the SPICE models of the TLV90xxS series (with shutdown feature).

There was a thread two years ago, where it was said that the shutdown feature was being reworked.

Any news on the availability of these models?

  • +1
    TI__Mastermind 26841 points

    Hey Luc,

    While there used to be models online for the TLV90xxS devices, they did not accurately reflect the behavior so we made the decision to remove them from the web until we had a better model. In this time there has been some looking into this, but we have run into issues with SPICE regarding convergence when there are discontinuous operation modes (like when shutdown is switched on and off) and how to adjust the existing model architecture to shutdown mode.

    Currently the shutdown models are still in development, but could I ask what behavior you are specifically looking to simulate?

    Best,
    Jerry

  • 0 in reply to Jerry Madalvanos
    Prodigy 10 points

    Hi Jerry,

    I'm trying to simulate some weird behavior I'm encountering in a circuit with TLV9002S.

    When I drive nSHUTDOWN low, at first the current consumption of the circuit decreases, but after a while it starts increasing to a value higher than when the amp was enabled.

    Kind regards,

    Luc

  • 0 in reply to Luc Does
    Prodigy 10 points

    Hi Jerry,

    I just found out that the additional current consumption is dependent on (sun)light hitting the package of the TLV9002S Hushed

    I verified using a laser pointer, and only when the laser hits the amp (TLV9002SIRUGR) does the power consumption increase, and only when nshutdown is driven low. Is this a known issue with this part?

    Kind regards,
    Luc

  • 0 in reply to Luc Does
    TI__Mastermind 26841 points

    Hey Luc,

    All semiconductor devices have some level of sensitivity to light based on package characteristics, light intensity, angle of incidence, and location in the circuit.

    This is probably more pronounced in shutdown as the quiescent current is already very low, so a small increase in Iq will be more pronounced.

    However, this would not be something that would be present in the spice model, this is a inherent material property behavior, not an amplifier core behavior.

    Best,
    Jerry

  • 0 in reply to Jerry Madalvanos
    Prodigy 10 points

    Hi Jerry,

    Thanks for the explanation. I'll mark your first reply as the answer to my question, and I'll ask my field application engineer if he can help me with solving the increase in quiescent current.

    Thanks for the help!