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
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.
Reply by Lasse Langwadt Christensen●October 24, 20222022-10-24
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
Reply by John Larkin●October 24, 20222022-10-24
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
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.
Reply by Phil Hobbs●October 23, 20222022-10-23
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
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.nethttp://hobbs-eo.com
Reply by John Larkin●October 21, 20222022-10-21
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.
Reply by John Larkin●October 21, 20222022-10-21
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.
Reply by Fred Bloggs●October 21, 20222022-10-21
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.
Reply by John Larkin●October 21, 20222022-10-21
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
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
Reply by Klaus Vestergaard Kragelund●October 20, 20222022-10-20
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
Reply by Klaus Vestergaard Kragelund●October 20, 20222022-10-20
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