First time Class D-IYer - 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 23rd October 2006, 03:26 PM   #1
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
Default First time Class D-IYer

please excuse the terrible pun.

Hello everyone, I am looking to build a simple class D amplifier, because I love the concept (and my RA keeps bugging me to build one). The only problem is that I have never worked on any real digital circuitry before (only tubes, and other analoge stuff). Is there a schematic that is simple, and fun for a first timer? I don't need much power, 5-15 WPC should be just fine.

Thanks alot
-Moose
  Reply With Quote
Old 23rd October 2006, 03:52 PM   #2
niiico is offline niiico  France
diyAudio Member
 
Join Date: Mar 2006
Location: Earth, France
You could go there : www.41hz.com

You won't get circuits descriptions but kits ready to be built.
  Reply With Quote
Old 23rd October 2006, 06:09 PM   #3
Xspunge is offline Xspunge  United States
diyAudio Member
 
Join Date: Jul 2006
Niico gave you a good site to check out. You should check out the Amp6 Basic. There are reviews on this site on that particular amp you can check out (from me and from others). They are somewhere under the Class D forums, maybe on the 2nd, 3rd or 4th page, but no later than that.

It is the most beginner friendly amp to build. And since you are in school you can probably get an electrial engineering student to check your work or have them with you when you solder to ensure you got everything correct. You should also be able to borrow a multimeter from them too. Also, the instructions are the easiest to follow too, since there are pictures to guide you. Other amps don't have that.

I have pics of a finished Amp 6 Basic posted here

http://s101.photobucket.com/albums/m59/Xspunge/?

Let us know what questions you have and someone will be able to help you out.
  Reply With Quote
Old 23rd October 2006, 11:34 PM   #4
RX5 is offline RX5  Philippines
diyAudio Member
 
RX5's Avatar
 
Join Date: Apr 2004
Location: TaC
nice work on the speaker BOX.... how thick are those plastics??
__________________
RoCk On!!! I love my diy UcD!!
  Reply With Quote
Old 25th October 2006, 12:31 AM   #5
v-bro is offline v-bro  Netherlands
diyAudio Member
 
v-bro's Avatar
 
Join Date: May 2006
Amp9 is also a very easy build, like amp6 also with trough-hole components mainly... Amp9 has the chip I listen to every day with much enjoyment

A bit more power can't hurt?

And the chip is quite fool-proof, protected against all kinds of abuse..

Supply is within the range of a single 10 to 27 Vdc, but this amp allready rocks at 12 Vdc!
__________________
Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......
  Reply With Quote
Old 25th October 2006, 04:04 AM   #6
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
I was thinking and almost positive I going to make Amp5. I looked at amp 9, but was dis-enchanted when I saw it is designed for a 4 ohm load, has anyone run it with an 8-ohm load? do you still seggest the amp9 for my 8-ohm speakers?
  Reply With Quote
Old 25th October 2006, 07:29 AM   #7
niiico is offline niiico  France
diyAudio Member
 
Join Date: Mar 2006
Location: Earth, France
It should work well with 8 Ohms load.

But if you want to tune it for 8 Ohms, you could change the output caps values and the toroid values.

I don't know the amp9, but usually it is replacing .22uF caps by .47uF caps and the toroid should be around 15mH.
  Reply With Quote
Old 25th October 2006, 01:22 PM   #8
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
Okay, I don't know how much this matters with digital electronics, but is there any specific brand of toroid's, or caps that work the best? I don't understand Class D well enough to know exactly what the caps do, but would some nice Paper in Oil caps work to achieve a better sound? so I know, are the caps we are speaking of the blue ones toward the left side of the board?

http://www.41hz.com/showgraph.aspx?ID=215
  Reply With Quote
Old 25th October 2006, 01:30 PM   #9
niiico is offline niiico  France
diyAudio Member
 
Join Date: Mar 2006
Location: Earth, France
Nope.

In the TK2050, it is said : "Use a high quality film capacitor capable of sustaining the ripple current caused by the switching outputs. Electrolytic capacitors should not be used."

So...
  Reply With Quote
Old 25th October 2006, 01:34 PM   #10
diyAudio Member
 
Join Date: Mar 2006
Location: Michigan
Okay, I looked at the datasheet for the TAA4100A, (this is the chip used in amp 9, right?), and those caps are not in the signal path, so paper in oils would gain nothing there

On the datasheet, it shows the output Toroids at 10uH, and the Caps at .47, is this set-up for 8 ohms? or 4 ohms? would you please clearify?

Thank you

-Moose

http://www.41hz.com/downloads/TAA4100A.PDF
  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
dead time, and class D distortion zenmasterbrian Class D 90 22nd January 2007 12:47 PM
delay time is it normal for class d amps djkiller1 Class D 1 7th December 2004 04:04 AM
1st time DIY Class A jab23 Solid State 18 23rd March 2002 11:52 AM


New To Site? Need Help?

All times are GMT. The time now is 07:01 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