Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

LT3042/3045 LTSpice simulation
LT3042/3045 LTSpice simulation
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old Yesterday, 10:42 AM   #51
carlmart is offline carlmart  Brazil
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Quote:
Originally Posted by OlegSh View Post
The layouts are really spacious around the regs. The distance between the decoupling caps and the regs is larger than I would like but if it works why not.
Considering the actual parts size, the caps, particularly the more critical output ones, seem to be around 10mm off, which I'm not sure it's not within specs.

Only getting one and checking that with a ruler would answer that.

I'm much concerned about the actual schematic they used, and, as you also raise, how they could get that price to be that low.

Either fakes or a large batch they could get from someone else that sold them for a lower price.

To check the first option only actual measurements can answer that.

In any case, the bet is low to try it to power an actual circuit. Which in my case would be a RIAA preamp.
  Reply With Quote
Old Yesterday, 11:12 AM   #52
carlmart is offline carlmart  Brazil
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Quote:
Originally Posted by OlegSh View Post
LT3081 would need help to improve its PSRR. Input CR(L)C filter comes to mind. Ideally I would think of using a DC-DC converter in front of it which allows for much lower CR(L)C components values to achieve >100dB extra PSRR at the switching frequency. Doing it for 50 or 60 Hz mains frequency requires large capacitance and either relatively big value resistor which increases the voltage drop and lowers efficiency or large size choke.
Yes, that's what I seemed to notice in my LT3081 simulations, which I thought were wrong because they were worst than the ones I had achieved even with a discrete regulator, which I can show you for you to see.

So I thought my implementation is wrong, and why I asked for a working schematic.

Probably you didn't see them, but there are a few threads dealing with remarkable regulators, some even as good or better than the superregulators.
  Reply With Quote
Old Yesterday, 12:20 PM   #53
OlegSh is offline OlegSh
diyAudio Member
 
Join Date: Dec 2010
Location: Germany
LT3042/3045 LTSpice simulation
I've seen all these threads dealing with all kinds of regulators but I prefer relative simplicity of the IC based LDO regs.
  Reply With Quote
Old Yesterday, 12:41 PM   #54
carlmart is offline carlmart  Brazil
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Except for the discrete regulator I will use on the power amplifier, some of the others I plan to build and listen to on the RIAA preamps I will be building.

That is a very sensitive circuit, and it's quite likely there are audible differences between the different regulators.
  Reply With Quote

Reply


LT3042/3045 LTSpice simulationHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to do IMD simulation in LTspice!!! nicholas1113 Software Tools 41 28th May 2019 06:29 PM
LTSpice Simulation Problem fasterbyelan Software Tools 8 28th April 2015 08:36 PM
LTspice simulation 8409513 Power Supplies 2 28th May 2012 04:02 PM
About LTSpice Simulation. nicholas1113 Solid State 2 15th November 2009 08:52 AM
LTSpice Simulation template?! ipop07 Software Tools 5 13th May 2009 07:17 PM


New To Site? Need Help?

All times are GMT. The time now is 09:47 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki