Dear Team,
i want to simulate this circuit that has ISL78843 but unfortunately no result as iit syas Starting pseudo-transient algorithm . So is there any suggestion or idea to expline it and to solve the issue?
output window
--------------- INFO(ORPROBE-3209): Simulation Profile: Booster-ut ---------------
INFO(ORPROBE-3183): Simulation running...
** Profile: "Booster-ut" [ c:\users\ali\documents\orcad\ttest-pspicefiles\booster\ut.sim ]
Reading and checking circuit
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
INFO(ORPSIM-15454): Model X_Q1.BSIM3: Using BSIM VERSION 3.1 or lower
Circuit read in and checked, no errors
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
Calculating bias point for Transient Analysis
Starting GMIN stepping
Starting power supply stepping
Starting pseudo-transient algorithm
Copyright © 2020 Cadence Design Systems, Inc. All rights reserved.
As i can see in your snapshot 54% of simulation is already completed and it is still running, it might be taking more time to simulate because of the nature and complexity of the circuit and models involved in the design.
In simulation settings go to Options -> Bias point under analog advanced -> Check if pseudotran option is enabled ?
You can also try using SKIPBP option if that makes the simulation run faster. It will be in the Analysis tab of simulation settings.
will , thanks for your input, i have done using SKIPBP option and it seems work ,but not in better result . still there is warrings as like this :
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
INFO(ORPSIM-15454): Model X_Q1.BSIM3: Using BSIM VERSION 3.1 or lower
Circuit read in and checked, no errors
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
WARNING(ORPSIM-16534): Using high values of ITL4 for Speed Level > 0 may increase total simulation job time.
so can you explain these issues and how can i slove them?
thanks,
ALi
These messages are specific to internal calculations wrt model parameters of Q1. You may need to check and tweak some model parameters
Appreciated your feedback, but would elaborate more ? I need to use those Mosfet, so sall i de some sitting on parameters if so how?
Hi,
can you explain how can i solve this issue ?
thank,
Ali
Can you share your design so i can check it at my end and suggest
Thanks ayush for your feedback and support.
I downloaded a MOSFET FDL100N50F and designed a sample circuit to see if the MOSFET is working fine. Final simulation done but with these output warnings: in red If I can solve this issue I will share the original circuit with you...
--------------- INFO(ORPROBE-3209): Simulation Profile: SCHEMATIC1-Re ---------------
INFO(ORPROBE-3183): Simulation running...
** Profile: "SCHEMATIC1-Re" [ c:\users\ali\documents\orcad\converter-pspicefiles\schematic1\re.sim ]
Reading and checking circuit
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
INFO(ORPSIM-15454): Model X_Q1.BSIM3: Using BSIM VERSION 3.1 or lower
Circuit read in and checked, no errors
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Pd = 0 is less than W
WARNING(ORPSIM-15235): Mosfet X_Q1.M_BSIM3, model X_Q1.BSIM3: Ps = 0 is less than W
Transient Analysis
Transient Analysis finished
License check-out time = .69
Total job time (using Solver 1) = .09
INFO(ORPROBE-3190): Simulation complete..
My dear ....
any update here pls ??
Pd and Ps are drain and source diffusion parameters. Their default value is 0 if not specified in model library. You might have to update the MOSFET model to add value for Pd and Ps. To edit the model RMB on the MOSFET symbol and click "Edit PSpice Model".
Hope this helps!
i will try and will keep you posted .
thanks for your feedback...
Since the parameters are missing in the model file, the default values i.e. 0 is being used for simulation.
In order to add them to the model file, it is advised to check with library vendor.
Could you explain more? Am afraid that I could not get you point.....
Reach out to the vendor (the one who created/supplied this library). I believe On Semiconductor is the vendor for this library.
They might be able to help and get Pd Ps parameters defined in the library.
Oook now i got your point.
really appreciate your immediately response. I will do it and keep you posted.
Can you explain a bit more? papa louie
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Simulation stuck in 'pseudo-transient algorithm'. Check ISL78843 model and circuit for errors. Dreadhead parkour might be faster for debugging this!