TPS62065 / Pspice transient model

Kuramochi Tadahiko

Guru 28715 points

Other Parts Discussed in Thread: TPS62065, TPS62097, TPS62085, TLV62065-Q1, TINA-TI

Hi,

I received the following question from my customer.

Can the TPS62065 PSpice Transient Model use to simulate phase characteristics?

Best Regards,

Kuramochi

over 8 years ago

0 Chris Glaser over 8 years ago

TI__Guru*** 147710 points

I think you are asking: can you measure a bode plot with the transient model? This requires an average model.

But the TPS62065 is rather old. Why not use the TPS62085 or TPS62097?

0 Kuramochi Tadahiko over 8 years ago in reply to Chris Glaser

Guru 28715 points

Hi Chris-san,

Thank you for your response.
Actually, my customer is using TLV62065-Q1 and they require Automotive grade.

Can TINA-TI model measure a bode plot?

Best Regards,
Kuramochi

0 JohnTucker over 8 years ago in reply to Kuramochi Tadahiko

TI__Guru**** 191445 points

You need an average model to measure the loop response. There are only transient models available.

0 Nikhil Gupta (Product Folder Models) over 8 years ago in reply to Kuramochi Tadahiko

TI__Mastermind 39210 points

Hi Kuramochi-san,

We typically do not create average models for hysteretic converters like this device. You will have to run time domain simulations using the transient model to evaluate the stability. There is a section in the datasheet that describes how to do this.

0 Kuramochi Tadahiko over 8 years ago in reply to Nikhil Gupta (Product Folder Models)

Guru 28715 points

Hi Gupta-san,

I'm understanding TPS62065 is voltage mode regulator.

Is it wrong?

Best Regards,

Kuramochi

0 Nikhil Gupta (Product Folder Models) over 8 years ago in reply to Kuramochi Tadahiko

TI__Mastermind 39210 points

Kuramochi-san,

I apologize for the confusion. I was getting my part numbers mixed up. Yes this is a voltage mode device. However the frequency of operation is more or less fixed and so is the range of the output filter. The details are provided in the datasheet. If the customer selects the components based on this recommendation, the design should be stable.

0 Kuramochi Tadahiko over 8 years ago in reply to Nikhil Gupta (Product Folder Models)

Guru 28715 points

Hi Nikhil-san,

My customer is requesting to calculate phase characteristics by simulation.
Could you prepare the Pspice average model?
Or is it enable by TINA-TI?

Best Regards,
Kuramochi

0 Nikhil Gupta (Product Folder Models) over 8 years ago in reply to Kuramochi Tadahiko

TI__Mastermind 39210 points

HI Kuramochi-san,

At this time there is no average model available for this device. The best way to test the stability would be to use the approach mentioned in the datasheet for this.

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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TPS62065 / Pspice transient model