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Original question:

TLV9361: TLV9361 Tina-TI Model?

TLV9362: TLV9362 replacement for OPA170 does not converge

Victor Yarberry
Prodigy 20 points
Part Number: TLV9362
Other Parts Discussed in Thread: OPA170, TINA-TI

TI-Tina Version 9.3.100.244 SF-TI

I replaced an OPA170 with a TLV9362 in an existing working (production design) simulation and now the transient simulation will not converge.

It reports problems with other unrelated parts - Zener and other diodes from the built-in library.

Sometimes it points to deleted parts! Restarting Tina and rebooting Windows 10 didn't help ...

Any ideas? I've tried to use the Trapezoid integration option and varying the integration order.

  • 0
    Guru 140200 points

    Hi Victor,

    yes, TINA-TI can be tricky from time to time.

    Can you post your simulation file?

    Kai

  • 0 in reply to kai klaas69
    TI__Mastermind 20780 points

    Hi Victor,

    Kai is correct. By posting your simulation file, we will be able to help you quicker! 

    Also thank you for taking a look at the next generation devices! 

    Best Regards,

    Robert Clifton 

  • 0 in reply to Robert Clifton56
    Prodigy 20 points

    Unfortunately, the simulation is for a proprietary design that I cannot upload.

    I was hoping to get recommendations on other settings to change.

    After reviewing similar topics on the forum, I've changed Shunt conductance to 1p.

    That change eliminated one of the false Zener diode errors but still generated another on a Si 1N4003 diode.

    Thanks!

  • 0 in reply to Victor Yarberry
    TI__Mastermind 20780 points

    Hi Victor,

    There's not a portion of the circuit regarding just the op-amp and the immediate surrounding circuitry that can you upload? 

    Best Regards,

    Robert Clifton 

  • 0 in reply to Victor Yarberry
    Guru 140200 points

    Hi Victor,

    over the years we have gained a lot of tricks how to make such a simulation work. Without seeing the simulation I cannot fully help.

    Here are some tipps:

    1. Divide and conquer. Divide the whole circuit into small portions and simulate them individually.

    2. Do not simulate every single dot on the "i"s. Focus on relevant subjects.

    3. Open a new file and draw the schematic totally from scratch. Do not even copy and paste anything from the old simulation which is not running.

    4. Play a bit with this parameter:

    Modify it from 10p to 10µ, or so.

    The first tipp is the most important Relaxed

    Kai