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Navendu Shekhar

Other Parts Discussed in Thread: TPS54620, TPS61202

Hi, I have tried to simulate the circuit that is provided in the application note of regulator TPS54620 but the simulation result failed saying operating point not found.

To simulate the circuit I have used Tina Software.Again I tried to use the examples that comes with Tina but it doesn't run. To open that I go to open-->examples-->smps-->TPS54620. Only simulation of Smps parts not occur otherwise all occurs. Can you give me solution for this ? I am also attaching the image of the circuit that I have implemented on the Tina software.

over 9 years ago

0 Britt Brooks - Online Design Tools over 9 years ago

TI__Mastermind 41310 points

Navendu,

Could you provide the .TSC file for us to evaluate? A picture does not contain the simulator settings that may effect the results.

Please also verify that you are running a Transient simulation with the transient model. If you are running a DC analysis, you will not get any useful information from the simulation as it would only contain the initial solution to the matrix for time step 0.

0 Navendu Shekhar over 9 years ago in reply to Britt Brooks - Online Design Tools

Intellectual 560 points

tps54620.TSC

0 Navendu Shekhar over 9 years ago in reply to Navendu Shekhar

Intellectual 560 points

I have uploaded the required tsc file.

0 Britt Brooks - Online Design Tools over 9 years ago in reply to Navendu Shekhar

TI__Mastermind 41310 points

Navendu,

Your simulation works fine when using the Transient simulation. However, you have set your SS cap to 10m which will require a very long simulation time (over 100 seconds of simulation time). I would suggest changing it to 2ns as the reference design has in it. This should result in the simulation completing in a reasonable amount of time. I also removed your VM open circuit. You should use a simple voltage pin for monitoring the output voltage.

Please do not use the transient model for a DC or AC simulation. Here is the updated file:

tps54620_up.TSC

0 Navendu Shekhar over 9 years ago in reply to Britt Brooks - Online Design Tools

Intellectual 560 points

Thank you Britt for your valuable answer as I am successfully able to simulate the circuit. Can we not simulate the circuit of boost converter(TPS61202). I haven't find that on tina.

0 Britt Brooks - Online Design Tools over 9 years ago in reply to Navendu Shekhar

TI__Mastermind 41310 points

Navendu,

We do not currently have a simulation model for the TPS61202. There is an EVM board available for it in the product folder.

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