WEBENCH® Tools/TPS62160: TPS62160/TPS62260/LP5907 Could not simulate correctly in one system

Shuang Feng76

Expert 3310 points

Part Number: TPS62160
Other Parts Discussed in Thread: LM3880, TINA-TI

Tool/software: WEBENCH® Design Tools

I find out TINA could simulate device separately. But when I add them in one system.

the output of LDO follow DCDC output. it is not normal.

Hope for your comments.

hope for your confirmation about the feasibility about the power up/down sequence simulated in our TINA.

2664.Noname.TSC

over 5 years ago

0 Jenson Lam over 5 years ago

TI__Prodigy 450 points

Hi Shuang Feng,

The output of LDO is same as output of DCDC because you have same net name, "VOUT" for both outputs.

regards,

jenson

TPS62160_LP5907.TSC

0 Jenson Lam over 5 years ago

TI__Prodigy 450 points

Hi Shuang Feng,

The output of LDO is same as output of DCDC because you have same net name, "VOUT" for both outputs.

regards,

jenson

1212.TPS62160_LP5907.TSC

0 Shuang Feng76 over 5 years ago in reply to Jenson Lam

TI__Expert 3310 points

Hi Jenson,

thanks for your help.

are you in TINA team? do we have TINA model about LM3880?

I need it to do some simulation. but we only have Pspice and it is encrypted. I could not use it.

hope for your check.

0 Jenson Lam over 5 years ago in reply to Shuang Feng76

TI__Prodigy 450 points

Hi Shuang Feng,

I am not with the TINA team and I do not have the TINA-TI spice model for LM3880. However, I have made a request to the TINA team and hopefully they can generate 1 for us. I will let you know once I have it.

Regards,

Jenson

0 JohnTucker over 5 years ago in reply to Jenson Lam

TI__Guru**** 191445 points

Shuang,

The internal circuitry of the LM3880 is pretty basic. You could probably construct your own model in a few minutes if you are in a hurry

0 Shuang Feng76 over 5 years ago in reply to JohnTucker

TI__Expert 3310 points

Hi John,

thanks for your suggestion.

about the model construct by myself? could you give me more details?

we need to simulate the sequence of our device. hope the model could satisfy the performance of our device.

0 JohnTucker over 5 years ago in reply to Shuang Feng76

TI__Guru**** 191445 points

Shuang

If you only need to simulate the EN sequencing, you could do that with individual VPULSE sources with the appropriate delays and pulse widths. I am not sure what the current turn time is on a model request but I would not be surprised if it takes 2-3 weeks. That was why I suggested a work around. Let me know how you want to proceed.

0 Jenson Lam over 5 years ago in reply to JohnTucker

TI__Prodigy 450 points

Hi,

The model request team's current estimate is Oct 10th for completion.

Regards,

jenson

0 Shuang Feng76 over 5 years ago in reply to JohnTucker

TI__Expert 3310 points

Hi,

we want to simulate the power down sequence without GPIO control.

due to it is not GPIO, used shunt resistance and other power supply, so we want to use simulation to evaluate the sequence directly.

0 JohnTucker over 5 years ago in reply to Shuang Feng76

TI__Guru**** 191445 points

Shuang

As noted above, your model will be completed on the 10th.

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WEBENCH® Tools/TPS62160: TPS62160/TPS62260/LP5907 Could not simulate correctly in one system