TPS1211-Q1: *Simulation Issue (Invalid Reverse Polarity Protection Function)

Matt Qi

Part Number: TPS1211-Q1

Hi team,

My customer faced a simulation problem, about the invalid reverse polarity protection function. The simulation files are attached following:

TPS12110-Q1_PSPICE_TRANS_X-2023-11-20-[09.15.18].rar

Here provides some problem description during the simulation, and they are all based on the provided simulation file.

The simulation is based on the grounded INP pin.

In order to simulate the reverse voltage, a -30V voltage source is launched at 250mV.

SRC pin is pulled low. However, PD/PU has not been pulled low following. There is a voltage difference between GS, and the MOS is conducted.

What's more, when performing short-circuit protection shutdown simulation, PD/PU is limited at 0V, without following SRC, too.

Pls help review the simulation file, and find out why the reverse voltage problem function is valid in this case.

Thanks a lot.

Best regards,

Matt.

over 1 year ago

0 Rakesh over 1 year ago

TI__Guru** 104791 points

Hi Matt,

Thanks for reaching out!

Let me check and get back by end of this week.

Best Regards,

Rakesh

0 Xiaoying Lu over 1 year ago in reply to Rakesh

TI__Expert 3640 points

Hi Rakesh,

Can you help speed up since customer is waiting for us? Thanks!

Regards,

Xiaoying

0 Rakesh over 1 year ago in reply to Xiaoying Lu

TI__Guru** 104791 points

sure Xiaoying.

0 Xiaoying Lu over 1 year ago in reply to Rakesh

TI__Expert 3640 points

Hi Rakesh,

This issue is very urgent, can you help here?

Regards,

Xiaoying

0 Rakesh over 1 year ago in reply to Xiaoying Lu

TI__Guru** 104791 points

Hi Xiaoying,

I ran the simulation model and verified the internal implementation. The output negative voltage protection is not implemented in the model, that's why we see a different behavior.

Let me check the effort needed for including that feature in model. Please refer below test waveforms during output reverse polarity protection.

Best Regards,

Rakesh

0 Xiaoying Lu over 1 year ago in reply to Rakesh

TI__Expert 3640 points

Hi Rakesh,

Thanks for your confirmation. Our customer mentions that they do need this feature implementation in our spice model for them to provide the total solution to their end customer. Can you help check whether you can add this feature additionally?

Regards,

Xiaoying

0 Rakesh over 1 year ago in reply to Xiaoying Lu

TI__Guru** 104791 points

Hi Xiaoying,

I need to check on the timelines. By when customer needs revised model ?

Best Regards,

Rakesh

0 Matt Qi over 1 year ago in reply to Rakesh

TI__Intellectual 2620 points

Hi Rakesh,

What is the status of this revised model?

Best Regards,

Matt.

0 Rakesh over 1 year ago in reply to Matt Qi

TI__Guru** 104791 points

Hi Matt,

We would be able to provide revised model by 15th Feb 2024. This is the best we can do by considering the available resources.

Please set expectation to the customer accordingly.

Best Regards

Rakesh

0 Rakesh 11 months ago in reply to Rakesh

TI__Guru** 104791 points

Hi Matt,

Please check with the attached revised model and confirm

slum846_updated.zip

Best Regards

Rakesh

0 Matt Qi 11 months ago in reply to Rakesh

TI__Intellectual 2620 points

Hi Rakesh,

Thanks for your support very much, and I have provided it to my customer yet.

Best Regards,

Matt.

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TPS1211-Q1: *Simulation Issue (Invalid Reverse Polarity Protection Function)