TI has encrypted Pspice models for many of their parts, but I can't persuade LT Spice to run the switchers I want to use. Any thoughts on that? One of my guys says he can run their Cadence sim, but I'd prefer LT. Parts are TPS54302, TPS563300, TPS562208. I'd consider paying a consultant to get them to work in LT Spice. If sim is too much hassle, we'd solder.
TI parts in LT Spice
Started by ●October 12, 2022
Reply by ●October 13, 20222022-10-13
On a sunny day (Wed, 12 Oct 2022 12:11:49 -0700) it happened John Larkin <jlarkin@highland_atwork_technology.com> wrote in <su2ekh57ijkql4og4sa35q8083sgv2avnj@4ax.com>:> >TI has encrypted Pspice models for many of their parts, but I can't >persuade LT Spice to run the switchers I want to use. Any thoughts on >that? > >One of my guys says he can run their Cadence sim, but I'd prefer LT. > >Parts are TPS54302, TPS563300, TPS562208. I'd consider paying a >consultant to get them to work in LT Spice. > >If sim is too much hassle, we'd solder.Solder is the only reality, no matter what spice says. Board layout counts, maybe they have evaluation boards?
Reply by ●October 13, 20222022-10-13
On Thu, 13 Oct 2022 03:32:26 GMT, Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:>On a sunny day (Wed, 12 Oct 2022 12:11:49 -0700) it happened John Larkin ><jlarkin@highland_atwork_technology.com> wrote in ><su2ekh57ijkql4og4sa35q8083sgv2avnj@4ax.com>: > >> >>TI has encrypted Pspice models for many of their parts, but I can't >>persuade LT Spice to run the switchers I want to use. Any thoughts on >>that? >> >>One of my guys says he can run their Cadence sim, but I'd prefer LT. >> >>Parts are TPS54302, TPS563300, TPS562208. I'd consider paying a >>consultant to get them to work in LT Spice. >> >>If sim is too much hassle, we'd solder. > >Solder is the only reality, no matter what spice says. >Board layout counts, maybe they have evaluation boards? > >I do have a couple of eval boards for the switchers. We can do that, but Spice can show currents and such easier. Everyone should just supply LT Spice models. A few semi makers do.
Reply by ●October 13, 20222022-10-13
John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: >Everyone should just supply LT Spice models. A few semi makers do. I told that the TI guys every time. I also told them how nice parts I can buy from Linear/Analog. You can hear teeth grinding in this moments. :-D Olaf
Reply by ●October 13, 20222022-10-13
On Thu, 13 Oct 2022 06:40:24 +0200, olaf <olaf@criseis.ruhr.de> wrote:>John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: > > > >Everyone should just supply LT Spice models. A few semi makers do. > >I told that the TI guys every time. I also told them how nice parts I >can buy from Linear/Analog. You can hear teeth grinding in this >moments. :-D > >OlafThe LTC parts are expensive, and being able to sim them easily is one reason why. LT Spice probably added a couple billion dollars to the price when Analog bought LTC. I managed to get the TI Pspice model of TPS563300 into LT Spice and run it. It looks OK until about 400 us into the sim, and hangs there at 30 fs/s speed. I guess I'll run the eval board. We already use a similar part, TPS54302, and it's great. Cute, quiet little switcher.
Reply by ●October 13, 20222022-10-13
On Wed, 12 Oct 2022 22:02:33 -0700, John Larkin <jlarkin@highlandSNIPMEtechnology.com> wrote:>On Thu, 13 Oct 2022 06:40:24 +0200, olaf <olaf@criseis.ruhr.de> wrote: > >>John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: >> >> >> >Everyone should just supply LT Spice models. A few semi makers do. >> >>I told that the TI guys every time. I also told them how nice parts I >>can buy from Linear/Analog. You can hear teeth grinding in this >>moments. :-D >> >>Olaf > >The LTC parts are expensive, and being able to sim them easily is one >reason why. LT Spice probably added a couple billion dollars to the >price when Analog bought LTC. > >I managed to get the TI Pspice model of TPS563300 into LT Spice and >run it. It looks OK until about 400 us into the sim, and hangs there >at 30 fs/s speed. > >I guess I'll run the eval board. > >We already use a similar part, TPS54302, and it's great. Cute, quiet >little switcher. >The manual for the eval board is TI document sluuc67a.pdf. Why do they do that?!
Reply by ●October 13, 20222022-10-13
On a sunny day (Wed, 12 Oct 2022 22:09:13 -0700) it happened John Larkin <jlarkin@highlandSNIPMEtechnology.com> wrote in <g97fkht9tcoi8gtdmmoqapkc57boaugatj@4ax.com>:>On Wed, 12 Oct 2022 22:02:33 -0700, John Larkin ><jlarkin@highlandSNIPMEtechnology.com> wrote: > >>On Thu, 13 Oct 2022 06:40:24 +0200, olaf <olaf@criseis.ruhr.de> wrote: >> >>>John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: >>> >>> >>> >Everyone should just supply LT Spice models. A few semi makers do. >>> >>>I told that the TI guys every time. I also told them how nice parts I >>>can buy from Linear/Analog. You can hear teeth grinding in this >>>moments. :-D >>> >>>Olaf >> >>The LTC parts are expensive, and being able to sim them easily is one >>reason why. LT Spice probably added a couple billion dollars to the >>price when Analog bought LTC. >> >>I managed to get the TI Pspice model of TPS563300 into LT Spice and >>run it. It looks OK until about 400 us into the sim, and hangs there >>at 30 fs/s speed. >> >>I guess I'll run the eval board. >> >>We already use a similar part, TPS54302, and it's great. Cute, quiet >>little switcher. >> > >The manual for the eval board is TI document sluuc67a.pdf. > >Why do they do that?!I dunno, google found it in one second, downloaded it and looking at it. I do rename all those funny name pfds to what it really is on my system. Most scientific papers also have a doi. ?? strange code, as do pictures of space objects from NASA etc.. raspberrypi: ~/Downloads # mv sluuc67a.pdf TPS562202_evaluation_board__sluuc67a.pd I leave the original 'code' in, preceded by a double __ Looks almost if they use a random password generator for the filenames.... BTW simple board, some positive spikes in Vout ...
Reply by ●October 13, 20222022-10-13
On 13/10/2022 05:40, olaf wrote:> John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: > > > >Everyone should just supply LT Spice models. A few semi makers do. > > I told that the TI guys every time. I also told them how nice parts I > can buy from Linear/Analog. You can hear teeth grinding in this > moments. :-DIf the salesmen take that message of lost sales back home eventually the suits that want to keep them all encrypted will get the message. AES 256 bit encryption won't yield to brute force attacks. -- Regards, Martin Brown
Reply by ●October 13, 20222022-10-13
On 13/10/2022 06:48, Jan Panteltje wrote:> On a sunny day (Wed, 12 Oct 2022 22:09:13 -0700) it happened John Larkin > <jlarkin@highlandSNIPMEtechnology.com> wrote in > <g97fkht9tcoi8gtdmmoqapkc57boaugatj@4ax.com>: > >> On Wed, 12 Oct 2022 22:02:33 -0700, John Larkin >> <jlarkin@highlandSNIPMEtechnology.com> wrote: >> >>> On Thu, 13 Oct 2022 06:40:24 +0200, olaf <olaf@criseis.ruhr.de> wrote: >>> >>>> John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: >>>> >>>> >>>>> Everyone should just supply LT Spice models. A few semi makers do. >>>> >>>> I told that the TI guys every time. I also told them how nice parts I >>>> can buy from Linear/Analog. You can hear teeth grinding in this >>>> moments. :-D >>>> >>>> Olaf >>> >>> The LTC parts are expensive, and being able to sim them easily is one >>> reason why. LT Spice probably added a couple billion dollars to the >>> price when Analog bought LTC. >>> >>> I managed to get the TI Pspice model of TPS563300 into LT Spice and >>> run it. It looks OK until about 400 us into the sim, and hangs there >>> at 30 fs/s speed. >>> >>> I guess I'll run the eval board. >>> >>> We already use a similar part, TPS54302, and it's great. Cute, quiet >>> little switcher. >>> >> >> The manual for the eval board is TI document sluuc67a.pdf. >> >> Why do they do that?! > > I dunno, google found it in one second, downloaded it and looking at it. > I do rename all those funny name pfds to what it really is on my system. > Most scientific papers also have a doi. ?? strange code, as do pictures > of space objects from NASA etc.. > > raspberrypi: ~/Downloads # mv sluuc67a.pdf TPS562202_evaluation_board__sluuc67a.pd > I leave the original 'code' in, preceded by a double __ > > Looks almost if they use a random password generator for the filenames....It is a stupid design of content management system that gives each new entity a more or less random but unique filename from some rule. To avoid typo collisions they populate its namespace sparsely.> > BTW simple board, some positive spikes in Vout ...-- Regards, Martin Brown
Reply by ●October 13, 20222022-10-13
Am 13.10.22 um 10:12 schrieb Martin Brown:> On 13/10/2022 05:40, olaf wrote: >> John Larkin <jlarkin@highlandsnipmetechnology.com> wrote: >> >> >> >Everyone should just supply LT Spice models. A few semi makers do. >> >> I told that the TI guys every time. I also told them how nice parts I >> can buy from Linear/Analog. You can hear teeth grinding in this >> moments. :-D > > If the salesmen take that message of lost sales back home eventually the > suits that want to keep them all encrypted will get the message.The TI op amp models work better in LT spice than those from AD, as far as I have used them. ADA4898 - THE HORROR! The first model got about everything wrong. Phase, noise densities in Volts... Years later came a 2nd edition, it still has convergence problems when you insert a second ADA4898 into your circuit, completely unrelated. I would not know how to create that behaviour if I wanted it. That design went TI. Cheers, Gerhard
