simulating TI switchers...

J

John Larkin

Guest
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.
 
On 21-10-2022 01:28, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.
Click to expand...
You can download \"Pspice for TI\". It is fully functional, only that is
allows only TI models
 
On 21-10-2022 01:34, Klaus Vestergaard Kragelund wrote:
On 21-10-2022 01:28, John Larkin wrote:


We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

You can download \"Pspice for TI\". It is fully functional, only that is
allows only TI models
Click to expand...
https://www.ti.com/tool/PSPICE-FOR-TI
 
On Fri, 21 Oct 2022 01:35:12 +0200, Klaus Vestergaard Kragelund
<klauskvik@hotmail.com> wrote:

On 21-10-2022 01:34, Klaus Vestergaard Kragelund wrote:
On 21-10-2022 01:28, John Larkin wrote:


We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

You can download \"Pspice for TI\". It is fully functional, only that is
allows only TI models
https://www.ti.com/tool/PSPICE-FOR-TI
Click to expand...


Yikes, another password login, install, learning curve. I\'ll assign a
junior engineer to try all that.

One virtue of LT Spice is that it\'s an open download, free,
unlicensed, non-brain damaged.

https://www.dropbox.com/s/qpidqsm9f8oxfvm/A4_green_pub19.jpg?raw=1

All that needs to be tuned.

Thanks
 
On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.
Click to expand...

They used to use TINA.
 
On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
<bloggs.fredbloggs.fred@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.
Click to expand...

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.
 
On Fri, 21 Oct 2022 12:02:17 -0700, John Larkin
<jlarkin@highland_atwork_technology.com> wrote:

On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
bloggs.fredbloggs.fred@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.
Click to expand...

A single switcher runs at about a minute per millisecond. Four
together will run a couple of useful sims per day, if that.
 
John Larkin wrote:
On Fri, 21 Oct 2022 12:02:17 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
bloggs.fredbloggs.fred@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.



A single switcher runs at about a minute per millisecond. Four
together will run a couple of useful sims per day, if that.
Click to expand...

Aren\'t there any eval boards?

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
On Sun, 23 Oct 2022 18:21:37 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Fri, 21 Oct 2022 12:02:17 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
bloggs.fredbloggs.fred@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.



A single switcher runs at about a minute per millisecond. Four
together will run a couple of useful sims per day, if that.


Aren\'t there any eval boards?

Cheers

Phil Hobbs
Click to expand...

We have a couple. What I want to do is test my primary switcher, 12 or
24 volts down to +5, and then the three secondary switchers to 3.3,
1.8, and 1.0. The secondaries will present a negative load impedance
to the primary, and we\'ll have a mess of bypass caps and ferrite beads
everywhere.

I really want to sim all that, but we\'ll breadboard if we have to.
It\'s about worth a proto board PCB layout. Eval boards are messy,
every possible jumper option.
 
mandag den 24. oktober 2022 kl. 21.41.25 UTC+2 skrev John Larkin:
On Sun, 23 Oct 2022 18:21:37 -0400, Phil Hobbs
pcdhSpamM...@electrooptical.net> wrote:

John Larkin wrote:
On Fri, 21 Oct 2022 12:02:17 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.



A single switcher runs at about a minute per millisecond. Four
together will run a couple of useful sims per day, if that.


Aren\'t there any eval boards?

Cheers

Phil Hobbs
We have a couple. What I want to do is test my primary switcher, 12 or
24 volts down to +5, and then the three secondary switchers to 3.3,
1.8, and 1.0. The secondaries will present a negative load impedance
to the primary, and we\'ll have a mess of bypass caps and ferrite beads
everywhere.

I really want to sim all that, but we\'ll breadboard if we have to.
It\'s about worth a proto board PCB layout. Eval boards are messy,
every possible jumper option.
Click to expand...

JLPCB has both in stock for assembly, so you could probably get 5 board with parts and assembly for $50 in a week
 
On Mon, 24 Oct 2022 13:14:03 -0700 (PDT), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

mandag den 24. oktober 2022 kl. 21.41.25 UTC+2 skrev John Larkin:
On Sun, 23 Oct 2022 18:21:37 -0400, Phil Hobbs
pcdhSpamM...@electrooptical.net> wrote:

John Larkin wrote:
On Fri, 21 Oct 2022 12:02:17 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Fri, 21 Oct 2022 08:38:59 -0700 (PDT), Fred Bloggs
bloggs.fred...@gmail.com> wrote:

On Thursday, October 20, 2022 at 7:28:14 PM UTC-4, John Larkin wrote:
We are using TPS54302 and TPS562208. I haven\'t been able to get their
Pspice models to work in LT Spice. They throw goofy errors, or run but
at fs speeds and make no useful progress.

TI apparently has their own sim, Cadence maybe, that might run these
parts.

Does anyone know how to do that, run the TI models with the TI
software? Or to get the Pspice models to run usefully in LT Spice?

We have a few situations I\'d like to check for load step response and
maybe feedforward compensation in the feedback divider. We could pay a
consultant to help, to save us breadboarding time.

They used to use TINA.

That\'s being phased out.

One of my guys installed their (brain-damaged) version of Pspice and
it looks like it will work to sim our weird switchers. Of course my
secondary switchers present a negative impedance load to the first
one, so we\'ll have to sim all four together. Even funner.



A single switcher runs at about a minute per millisecond. Four
together will run a couple of useful sims per day, if that.


Aren\'t there any eval boards?

Cheers

Phil Hobbs
We have a couple. What I want to do is test my primary switcher, 12 or
24 volts down to +5, and then the three secondary switchers to 3.3,
1.8, and 1.0. The secondaries will present a negative load impedance
to the primary, and we\'ll have a mess of bypass caps and ferrite beads
everywhere.

I really want to sim all that, but we\'ll breadboard if we have to.
It\'s about worth a proto board PCB layout. Eval boards are messy,
every possible jumper option.

JLPCB has both in stock for assembly, so you could probably get 5 board with parts and assembly for $50 in a week
Click to expand...

It would be convenient to buy a few boards assembled, but we could
assemble them here. The PCB layout would be a minor nuisance, annoying
because the TI sim is unusably slow.
 
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