Tripath amps -- TK2050 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 26th December 2009, 03:14 PM   #1
jmar is offline jmar  United States
diyAudio Member
 
Join Date: Jan 2004
Location: Indiana
Default Tripath amps -- TK2050

I have no experience with these but just bought a 4x100w module off of Ebay to use in my home theater setup for the 2 rear, sub and center channels.

Too good to pass up and curious about that "tripath" sound I read so much about.

If I like it, I may use it for my stereo L and R as well.

What is the deal with the power supplies on these chips?
First of all it looks like it's single sided? +24v (NOT split - and +)

And unlike conventional amps it looks like it needs a regulated supply -- will a simple LM317 with a +24vdc output suffice? (I don't really listen very loud).

I see elaborate switching power supplies being suggested. necessary?
why?

THANKS.
  Reply With Quote
Old 27th December 2009, 02:17 PM   #2
jmar is offline jmar  United States
diyAudio Member
 
Join Date: Jan 2004
Location: Indiana
Anybody?

I'll plan on building a +24vdc supply with conventional regulation -- (an LM317) -- unless there's a reason not to.

(Class D people are efficiency freaks maybe?)

Even the PS should be switching?
  Reply With Quote
Old 27th December 2009, 03:46 PM   #3
cyteen is offline cyteen  England
diyAudio Member
 
cyteen's Avatar
 
Join Date: Mar 2004
Location: S.E
My rule for switching supplies is the the switching frequency should be at least 3x the highest frequency you want to hear. So above 60khz. Then the artifacts of the switching are well outside the audio band. If you can't find an smps that does this then your better off going regulated linear.

An lm317 isn't going to have a high enough rating (1.5 amp) better to use a lm338 regulator (5 amp).
  Reply With Quote
Old 27th December 2009, 06:03 PM   #4
diyAudio Member
 
Join Date: Apr 2006
Location: Reykjavík
Quote:
Originally Posted by jmar View Post
What is the deal with the power supplies on these chips?
First of all it looks like it's single sided? +24v (NOT split - and +)
Yep! (At least the 41Hz TK2050's I know are single-sided. I have a hard time imagining that the Sure is any different.)

Quote:
Originally Posted by jmar View Post
And unlike conventional amps it looks like it needs a regulated supply -- will a simple LM317 with a +24vdc output suffice? (I don't really listen very loud).
You actually don't need a regulated supply. A simple rectifier + capacitor solution will also work. These amps aren't particularly sensitive to what power supply you use.

Quote:
Originally Posted by jmar View Post
I see elaborate switching power supplies being suggested. necessary?
why?
Well, 12V switchers are ubiquitous. Cheap and simple to get going, too. Light and power efficient. Higher voltage and higher quality switchers are harder to find, though. It just depends on what you have the best access to.

I'd advise you just get it going somehow without sinking too much money into the supply. You'll be pleasantly surprised. Or at least I have usually been.
  Reply With Quote
Old 27th December 2009, 06:22 PM   #5
diyAudio Member
 
Josephjcole's Avatar
 
Join Date: Jun 2004
Location: Wisconsin
Most people use the switching power supplies for three reasons:
1 simple
2 cheap
3 they sound good

I imagine either of these power supplies could fit your needs:

27V DC 13A 351W Regulated Switching Power Supply_Industrial Power Adapter_Boxed Industrial Power Adapter and Chargers and Transformers_Measure Power Adapters_Sure Electronics' Webstore

36V DC 9.7A 349.2W Regulated Switching Power Supply_Industrial Power Adapter_Boxed Industrial Power Adapter and Chargers and Transformers_Measure Power Adapters_Sure Electronics' Webstore
  Reply With Quote
Old 27th December 2009, 08:13 PM   #6
jmar is offline jmar  United States
diyAudio Member
 
Join Date: Jan 2004
Location: Indiana
In conventional power amps a regulated supply is something you DON'T WANT.

I guess with class D the rail swings are pretty tame in comparison to Class AB etc. I'll have to study up.

Is there ANY advantage to regulation?

Other than inherent noise reduction? (and maybe prevention of noise back into the line?)
  Reply With Quote
Old 27th December 2009, 09:30 PM   #7
diyAudio Member
 
Join Date: Dec 2009
Quote:
Originally Posted by jmar View Post
Other than inherent noise reduction? (and maybe prevention of noise back into the line?)
Speaking of that, is there any belief that these sorts of supplies prevent ground loop hum?

Joe.
  Reply With Quote
Old 27th December 2009, 09:53 PM   #8
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Kona, Hawaii
Blog Entries: 4
One of the big advantages of regulation is that it allows you to run near max safe voltage without ever going over. That's important in a low voltage amp. Maybe less so in a higher voltage amp where you have more margin - I.E. you don't have to run so close to max voltage to get the power you want.

Other than that, some folks like the sound of a nice regulated supply.
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 28th December 2009, 01:29 AM   #9
john65b is offline john65b  United States
diyAudio Member
 
john65b's Avatar
 
Join Date: Jan 2005
Location: Chicago
If I remember correctly, an LM317 is 1 amp, LM350 is 1.5 amp

Try an old laptop power supply - usually 20VDC and 3.5 amps
__________________
All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian
  Reply With Quote
Old 28th December 2009, 05:03 AM   #10
sendler is offline sendler  United States
diyAudio Member
 
Join Date: Aug 2004
Location: ny
Default smps sounds better

Quote:
Originally Posted by jmar View Post
Anybody?

I'll plan on building a +24vdc supply with conventional regulation -- (an LM317) -- unless there's a reason not to.

(Class D people are efficiency freaks maybe?)

Even the PS should be switching?
I retired my big linear supply when I started using the Sure 2X100 as the MeanWell smps sounds much better.
__________________
Scott
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
new Battery powered TK2050 Amps! 2 right now, I might build more later. gripracer Swap Meet 18 31st January 2011 09:15 PM
Hissy Tripath amps? MikeHunt79 Class D 3 1st May 2009 06:46 PM
Tripath Head Amps ? EdT Solid State 1 13th March 2007 05:52 AM
Tripath TK2050 Eccu Digital Source 0 19th April 2002 12:06 PM


New To Site? Need Help?

All times are GMT. The time now is 02:37 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2