Re: [neonixie-l] Re: Loop compensation and Bode plots?

No I hadn't seen that. It looks very useful. Thanks. > On Aug 16, 2017, at 11:24 AM, Nick wrote: > >> On Wednesday, 16 August 2017 01:48:18 UTC+4, Paul Andrews wrote: >> BTW the zipped model works fne. > > That's good - have you seen this article: >

[neonixie-l] Re: Loop compensation and Bode plots?

On Wednesday, 16 August 2017 01:48:18 UTC+4, Paul Andrews wrote: > > BTW the zipped model works fne. > That's good - have you seen this article: http://www.linear.com/solutions/5788 ? Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To

[neonixie-l] Re: Loop compensation and Bode plots?

BTW the zipped model works fne. On Sunday, August 13, 2017 at 10:29:17 AM UTC-4, Paul Andrews wrote: > > The flex model is at > http://katalog.we-online.com/pbs/download/Download%20%20WE_FLEX%20LTspice%20(rev1).zip > > > On Saturday, August 12, 2017 at 11:15:20 PM UTC-4, Nick wrote: >> >> In

[neonixie-l] Re: Loop compensation and Bode plots?

The flex model is at http://katalog.we-online.com/pbs/download/Download%20%20WE_FLEX%20LTspice%20(rev1).zip On Saturday, August 12, 2017 at 11:15:20 PM UTC-4, Nick wrote: > > In LTspice, if you go to *Tools -> Control Panel, *the select the *Netlist > Options* tab, in the* Style/Convention*

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Hi Nick, I will check when I get back to my computer. > On Aug 12, 2017, at 11:15 PM, Nick wrote: > > In LTspice, if you go to Tools -> Control Panel, the select the Netlist > Options tab, in the Style/Convention area click the Convert ... tickbox - > that will make your

[neonixie-l] Re: Loop compensation and Bode plots?

In LTspice, if you go to *Tools -> Control Panel, *the select the *Netlist Options* tab, in the* Style/Convention* area click the *Convert ...* tickbox - that will make your capacitor values look ok - modern versions of LTspice convert "u" in component values to the Greek letter mu (i.e.,

[neonixie-l] Re: Loop compensation and Bode plots?

Uploaded MyHVPS-NMdS.zip On Saturday, 12 August 2017 20:21:42 UTC+4, Nick wrote: > > LTspice XVII(x64) June 19 2017 version on Windows 10 Pro 64bit. > > I always run a very recent version > > Maybe the upload somehow corrupted the files I'll zip them. > > Nick > > -- You received this

[neonixie-l] Re: Loop compensation and Bode plots?

LTspice XVII(x64) June 19 2017 version on Windows 10 Pro 64bit. I always run a very recent version Maybe the upload somehow corrupted the files I'll zip them. Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this

[neonixie-l] Re: Loop compensation and Bode plots?

I tried running this version, but the simulation window doesn't open and I can't place probes on the circuit. I looked in the .asc file and fixed up the path to the wurth model, but it made no difference. I have no idea how to get that window back. Also, the values of caps that were uF became

[neonixie-l] Re: Loop compensation and Bode plots?

HI - You LM3478 symbol pinout was wrong - you've got pins 5 - 8 flipped... Its a slow deck for sure - I'll have a play with in in the next couple of days. Also attached slightly reformatted schematic to compensate for change in the ASY file. Annoying that the PSPICE model from TI has a

[neonixie-l] Re: Loop compensation and Bode plots?

I put a file (MyHVPS.zip in the temp folder of our google drive). On Saturday, August 12, 2017 at 9:32:18 AM UTC-4, Paul Andrews wrote: > > I am using an LM3478 library and a Wurth flex transformer library. I > suspect that is where the time is going. I have zipped up the .asc file and > the

[neonixie-l] Re: Loop compensation and Bode plots?

I am using an LM3478 library and a Wurth flex transformer library. I suspect that is where the time is going. I have zipped up the .asc file and the aformentioned libraries (though the Wurth ones were pulled out of the LTSpice library folder, so they are in the wrong place!). Hmm, I guess I

Re: [neonixie-l] Re: Loop compensation and Bode plots?

That doesn't sound right - If you post your stack I'm sure one of us with more LTspice experience may be able to help. The LTspice Yahoo! group is also an excellent resource for advice - the LTspice developers hang out there and that's where the real knowledge is. Nick On Friday, 11 August

Re: [neonixie-l] Re: Loop compensation and Bode plots?

You really only need to run until the transients have settled-out. The design I'm doing now runs at about 50kHz, and it takes 1-2 minutes to reach 15msec. Most of the transient activity ends around 3-4msec, but the runtime isn't a nuisance yet. Is the simulation running really slow in 1

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Thanks. I will check. I wish I had a faster computer. It is taking about 15 mins to do a 8ms simulation ATM. I wonder if there are any online versions? Hmm. I wonder if I could use my own online servers or Amazon cloud? I've never used my own servers for anything other web hosting/svn etc.

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Make sure to look carefully at corner cases, like max-load at min-input-voltage (typically causes max inductor current). >From the app-note, I see there is a discrete NMOS transistor, and thankfully a single inductor (not transformer), so your modeling is easier. Be very careful about the

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Varying load is easy - parameterise the load and use the .step param [name] list val1,val2... command. Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to

Re: [neonixie-l] Re: Loop compensation and Bode plots?

Yes. I've got 3 different linear tech devices on my list. The LM3478 actually has an LTSpice model and the Wurth flex transformer I'm using does too (from TI and Wurth respectively). The circuit I put together simulates just fine, so I'm just trying to increase my level of confidence in it at

[neonixie-l] Re: Loop compensation and Bode plots?

Have you considered using devices from Linear Technology (now Analog Devices) ? You can run extensive simulations with LTSpice, using accurate models for their ICs (I assume they are encrypted spice models). I dont do bode plots for any of my designs; instead I rely heavily on spice