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WEBENCH® Tools/SN65HVD255: SN65HVD255 IBIS Model

Susan Sun4
Prodigy 50 points
Part Number: SN65HVD255

Tool/software: WEBENCH® Design Tools

Hi team,

My customer is meeting a problem that IBIS model of SN65HVD255 isn't convergent.

I have uploaded their simulation file, could you please kindly help to check out the reason?

Thanks!

tlsim.log 
**** Tlsim Version 16.2 ****

**** Tlsim command line ****
 tlsim -r 0.050000 -BhvrSplineOn -o waveforms.sim -dl delay.dl -dst distortion.dst -log tlsim.log -ocycle cycle.msm main.spc


Number of Nodes in this circuit = 173


Statistics on N-line elements:
 Number of 'n' type multi-conductor elements = 17
 Type-of-N-element  #elms Max_Length TotalLength

 2-line-N-elm     17   0.508    3.8862
 Total Interconnect Length = 7.7724
 Total Coupled Length = 7.7724

 Following is some statistics on Model usage
   Model-Type      Model-Name     Number-of-Models-in-this-circuit

   bdrvr         HVD255_CANL_BI_Typ_27degC               2 
   bdrvr         HVD255_CANH_BI_Typ_27degC               2 
   bdrvr         AMIS30660_CANL_BI_Typ_27degC               6 
   bdrvr         AMIS30660_CANH_BI_Typ_27degC               6 
  No of 'Bdrvr' type model instance = 16

 Time Step at Start = 5e-011



 Simulation will start at t=0 and end at t=4.00719e-006. 


*********************************************
*  WARNING: Convergence Problem detected    *
*********************************************
Solution did not converge during transient analysis
No of iterations = 41 
 Time = 1e-010 
 Max Residue = 0.983797 
		Matrix Size = 10

*** ABORT: Transient Convergence Problem Is Severe ***

*** Suggested solutions are ... ***

*** Since you have bhvr models try the switch '-BhvrTransientModifyNewtonOff' ***

*** try using resistors(large) to ground and/or capacitors between nodes to filterout high freq noise***


*** Examine circuit attached to  Node 'DESIGN.SLOT6.7' ***
*** other nodes in this circuit are -- ***
 '24464RL' 
 'DESIGN.SLOT6.7i' 
 'DESIGN.SLOT6.7i_DESIGN.SLOT6.6i_comm' 
 'DESIGN.SLOT6.6i' 
 '26962RL' 
 'DESIGN.SLOT6.6' 
 'DESIGN.SLOT6.7_DESIGN.SLOT6.6_comm' 

**** Transient Simulation Statistics ****

    Number Of time step solutions = 2

**** Tlsim Run Times ****

    Start time = Mon Jan 15 15:22:25 2018

    Finish time = Mon Jan 15 15:22:25 2018

    Elapsed time = 0 hours, 0 minutes, and 0 seconds

  • 0
    TI__Mastermind 25705 points
    Susan,
    We're working with webench team for debug. We will get back to you shortly.
    Regards,
    Hao
  • 0 in reply to Hao L
    TI__Mastermind 25705 points

    Susan,

    We used HyperLynx to run IBIS model and didn't see any issue.

    Can you check what software your customer used? And how they set up the bench? Thanks!

  • 0 in reply to Hao L
    TI__Prodigy 50 points

    Hi Hao,

    Thanks to your answer.

    The software my customer used is Sigxp.

    I have uploaded their simulation error Log, please kindly help to check the error. Any specific information needed, feel free to let me know.

    Thank you ! 

    4370.tlsim.log 
    **** Tlsim Version 16.2 ****

**** Tlsim command line ****
 tlsim -r 0.050000 -BhvrSplineOn -o waveforms.sim -dl delay.dl -dst distortion.dst -log tlsim.log -ocycle cycle.msm main.spc


Number of Nodes in this circuit = 197


Statistics on N-line elements:
 Number of 'n' type multi-conductor elements = 17
 Type-of-N-element  #elms Max_Length TotalLength

 2-line-N-elm     17   0.3683    3.302
 Total Interconnect Length = 6.604
 Total Coupled Length = 6.604

 Following is some statistics on Model usage
   Model-Type      Model-Name     Number-of-Models-in-this-circuit

   bdrvr         HVD255_CANL_BI_Typ_27degC               1 
   bdrvr         HVD255_CANH_BI_Typ_27degC               1 
   bdrvr         AMIS30660_CANL_BI_Typ_27degC               7 
   bdrvr         AMIS30660_CANH_BI_Typ_27degC               7 
  No of 'Bdrvr' type model instance = 16

 Time Step at Start = 5e-011



 Simulation will start at t=0 and end at t=4.0067e-006. 


*********************************************
*  WARNING: Convergence Problem detected    *
*********************************************
Solution did not converge during transient analysis
No of iterations = 41 
 Time = 1e-010 
 Max Residue = 1.10611 
		Matrix Size = 11

*** ABORT: Transient Convergence Problem Is Severe ***

*** Suggested solutions are ... ***

*** Since you have bhvr models try the switch '-BhvrTransientModifyNewtonOff' ***

*** try using resistors(large) to ground and/or capacitors between nodes to filterout high freq noise***


*** Examine circuit attached to  Node 'DESIGN.SLOT0.7' ***
*** other nodes in this circuit are -- ***
 '24' 
 'DESIGN.SLOT0.6' 
 '23281RL' 
 'DESIGN.SLOT0.6i' 
 'DESIGN.SLOT0.7i_DESIGN.SLOT0.6i_comm' 
 'DESIGN.SLOT0.7i' 
 '16827RL' 
 'DESIGN.SLOT0.7_DESIGN.SLOT0.6_comm' 

**** Transient Simulation Statistics ****

    Number Of time step solutions = 2

**** Tlsim Run Times ****

    Start time = Tue Jan 30 12:03:23 2018

    Finish time = Tue Jan 30 12:03:23 2018

    Elapsed time = 0 hours, 0 minutes, and 0 seconds

     

  • 0 in reply to Susan Sun4
    TI__Mastermind 25705 points

    Susan,

    Unfortunately I'm not familiar with this tool. But after reviewing the log, it looks like this is more like a setup issue. Can you get more information about the simulation setup? Here is mine for your reference.

    They can also try the two suggestions the tools gave: 1) try the switch '-BhvrTransientModifyNewtonOff'; 2) adding big resistors to ground and cap between nodes. Usually it's not helpful to leave any node undefined in the simulator.

    Regards,

    Hao