Dear team,
I have downloaded the TI spice model which shows the Bode plot for Cff 1500pF capacitor value. I have to do Bode plot analysis with CFF for different values. That is parametric sweep for CFF. Please tell how to perform.
To download the TI model --> go to
https://www.ti.com/product/LM46002#design-development
Then Design and Development TAB
Then Design tools and simulation
Then download the LM46002 PSpice Average Model
Run --> it will give Bode plot. now I have to have multiple Bode plot with CFF value from 15pF to 1500pF. How to make it?
Copyright © 2020 Cadence Design Systems, Inc. All rights reserved.
1) Set the value of CFF to a global parameter
2) ADD that global parameter to the PARAMETERS: list
3) Edit the simulation profile and add a parameter sweep to the AC analysis
4) Run the analysis
For more detailed information, open PSpice for TI Help and go to the PSpice User Guide. Read the section on Parametric analysis.
I have followed exactly given session on
https://www.pspice.com/pspice-for-ti/tutorial-videos?utm_source=kishore&...
The only difference is AC analysis and parametric sweep of CFF{CVAL} for range of 47p to 1500p with 25p step size.
I have uploaded the simulation model here
https://drive.google.com/drive/folders/1RjZnyNiAOkATtE2cBywzKGIGGpy-PglP...
Please check and can you please tell, what is the cause of not simulating as I want. (Multiple Bode plot with all values from 47p to 1500p)
Thank you.
I've had no problem running the AC parametric sweep from 47p to 1500p in 25p steps and displaying all traces on the Bode plot. When the simulation ends did you select all traces for display?
did you select all traces for display?
--> After simulation ends, --> I see only one graph even when I selected "Show all traces".
Please how to select all traces for display. Below only.
https://drive.google.com/file/d/1G-zxX5Wp-0msyTIklh2BoQZXOfIIg9eY/view?u...
In the Parametric Sweep setup, did you check the box next to it?
Yes. I checked it.
please see
https://drive.google.com/file/d/1InoahBTjnEeT123J1kboakyQDJiEU4Ze/view?u..., https://drive.google.com/file/d/1dRe2wwTrI21gUJ3HN9KQc_Dk-ZwZup6N/view?u...
Can you please upload your files with all settings at the below location so that I can try, and should run on my PC?
https://drive.google.com/drive/folders/1RjZnyNiAOkATtE2cBywzKGIGGpy-PglP...
Your increment shows 25. It should be 25p.
Thank you. Yes, now it shows all results. Thank you. I was not aware of this.
Next level, can you please tell, how to perform "performance analysis" for Gain margin to get the optimum value of CFF.
What should be entered here?
https://drive.google.com/file/d/1kN1cUdJrR-UVYX7QHWHQ2qHjZ37mOIUX/view?u...
You won't be able to measure Gain Margin since the phase never reaches -180 degrees. However, you can do a performance analysis on Phase Margin. Your arguments would be DB(V(VOUT)) and P(V(VOUT)).
Thank you for all your inputs. It really helped me to see the effect of CFF on the stability of the DC/DC converter.
Please suggest good articles about DC/DC converter and AC/DC converter that will give in-depth consideration to avoid the failure if any.
Open the downloaded LM46002 PSpice Average Model in your circuit simulation software.
Double-click on the CFF capacitor in the circuit diagram to open its properties dialog box.
In the properties dialog box, click on the "Value" field and type "CFF" to define it as a parameter.
Go to the PSpice menu and select "New Simulation Profile" to create a new simulation profile.
In the "Simulation Settings" dialog box, select "AC Sweep/Noise" as the analysis type and set the wordle frequency range and step size as desired.
In the "AC Sweep/Noise" tab, click on "Add/Edit Simulation Profiles" to open the "Parametric Analysis Profiles" dialog box.
it's very helpful, i have looked for a long time.
------------------
433Mhz Superheterodyne Receiver Module Wireless ET-RX-13
Thanks for sharing this useful method and territorial io. My problem is solved
Attention all music mavens! Heardle is the game that promises to tickle your auditory senses and challenge your musical knowledge. Immerse yourself in a world of diverse genres and decades, and let the guessing games commence!