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

Class D Switching Power Amplifiers and Power D/A conversion

Cheap TPA3118D2 boards, modding them and everything that comes with it
Cheap TPA3118D2 boards, modding them and everything that comes with it
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 9th February 2018, 03:02 PM   #2291
selwe is offline selwe
diyAudio Member
 
Join Date: May 2016
Location: Romania
Here is how I do it:
An externally hosted image should be here but it is no longer accessible. Please upload images instead of linking to them to prevent this.
  Reply With Quote
Old 9th February 2018, 03:11 PM   #2292
DreadPirate is offline DreadPirate  United States
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Athens, GA
The FP series seem to have better specs than FK, particularly for RC (850 vs 600 at 220uF/35V size). The datasheet only has 220uF total here, the largest capacity FP at 8mm would be 220uF.
__________________
I would give it all up for just a little bit more...
  Reply With Quote
Old 13th February 2018, 10:28 PM   #2293
DreadPirate is offline DreadPirate  United States
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Athens, GA
My advice to anyone f-ing with these boards is to leave the rail caps alone. After putting down a ton of heat to break the solder joints, pulling half the traces and, generally, creating a big mess, I think this is going to be an abandoned project. Not sure these are any better than my Sanwu TDA7498 and have been pretty much a headache to mod. The inductor mod was not nearly a problem. Not worth the effort in my opinion.
__________________
I would give it all up for just a little bit more...
  Reply With Quote
Old 15th February 2018, 12:09 PM   #2294
Nenola is offline Nenola  Finland
diyAudio Member
 
Join Date: Feb 2008
Quote:
Originally Posted by doctormord View Post
I wouldn't go for this "big" 10uF, better is higher resistance and lower value capacitor - in case of component size. (It's also better to have less capacitance when you deside to left the diode out.) I don't know if the "Giancarlo" mod is needing 10uF. o.O

You may go this way:

Click the image to open in full size.

Diode is not "a must", but nice to have.

But all in all, doable.
I need to implement your antipop-design, but I'm not sure how. I mean I find the corresponding pins from the board, but am I supposed to replace existing components or just add what you have here? I took a closeup about the situation so maybe you guys could help me.

And what about the used components? Is there some specific requirements for the resistor, capacitor and diode? Can i use a basic through hole-resistor and electrolytic capacitor?
Attached Images
File Type: jpg ampmod.jpg (511.9 KB, 291 views)
  Reply With Quote
Old 17th February 2018, 11:22 PM   #2295
DreadPirate is offline DreadPirate  United States
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Athens, GA
Quote:
Originally Posted by DreadPirate View Post
My advice to anyone f-ing with these boards is to leave the rail caps alone. After putting down a ton of heat to break the solder joints, pulling half the traces and, generally, creating a big mess, I think this is going to be an abandoned project. Not sure these are any better than my Sanwu TDA7498 and have been pretty much a headache to mod. The inductor mod was not nearly a problem. Not worth the effort in my opinion.
Seems like I'm the only one having problems desoldering the rail caps on this, so this is how I ended up doing it without lifting traces. I used my ChipQuik SMD1 kit, fluxing the solder joint, heating it up with a dab of the CQ solder on each side back and forth and eventually sliding (not lifting side to side) the cap off. I used 350C temp, though a higher temperature might work better, as the iron with chisel tip did spend more time on the joint than I felt comfortable with (maybe 10s), but with patience, each came off without lifting traces. I installed Panasonic FP 330/25V, these were the largest caps with an 8mm in that series. Measured ESR was .07 on these.
__________________
I would give it all up for just a little bit more...
  Reply With Quote
Old 18th February 2018, 02:49 PM   #2296
larzman is offline larzman  United States
diyAudio Member
 
Join Date: Aug 2006
Location: Chicago, IL
Default Finally mounted, wired and testing

Got everything mounted and wired. Testing went well, it worked! lol. These are stock Sanwu's, no mods yet as I wanted to be sure all my other hardware is correctly wired first. All good

Couple of observations, amps connected to Klipsch KSF 8.5, 8-Ohm speakers:
- no audio amp noise, noise is only observed when less than a foot from speakers, then only slight
- using a switch, mute pins make the speakers completely silent
- decent bass for tiny amps, powered by 24VDC up to 6A power supply
- mids & highs are crisp and clear (speakers are a big factor)
- iPhone 6+ can push the amps into thermal shutdown in about a minute
- Chromecast Audio can push amps into thermal shutdown in about 30 seconds
- Alexa won't respond if the music is cranked up, unless it's during a quiet passage

Obviously, the enclusure needs top cover installed. That cover mounts the IEC 120VAC input socket (uses same cord/connector as desktop pc), which includes a fused, lighted switch.

Overall, very happy. Time for some mods and wire routing cleanup.
An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
  Reply With Quote
Old 18th February 2018, 09:46 PM   #2297
zek is offline zek
diyAudio Member
 
zek's Avatar
 
Join Date: Aug 2003
You have no volume control?
  Reply With Quote
Old 18th February 2018, 09:59 PM   #2298
larzman is offline larzman  United States
diyAudio Member
 
Join Date: Aug 2006
Location: Chicago, IL
Quote:
Originally Posted by zek View Post
You have no volume control?
Volume control is done by the streaming device, i.e., Alexa or Chromecast via mobile phone, or bluetooth receiver plugged into 3.5mm input jack. The amp is totally hands-free after power-up and the audio (volume and selection) is controlled elsewhere. Why add the complexity and possible noise source of a volume control?
  Reply With Quote
Old 18th February 2018, 09:59 PM   #2299
irribeo is offline irribeo  Netherlands
diyAudio Member
 
Join Date: Apr 2013
Thermal shutdown ? With music ?
I can trip protection easily with music but never the thermal, I think that means above 150 degrees Celsius.
  Reply With Quote
Old 19th February 2018, 12:41 AM   #2300
larzman is offline larzman  United States
diyAudio Member
 
Join Date: Aug 2006
Location: Chicago, IL
Quote:
Originally Posted by irribeo View Post
Thermal shutdown ? With music ?
I can trip protection easily with music but never the thermal, I think that means above 150 degrees Celsius.
Maybe I'm inaccurate, using wrong term, but the amps both shut down for a few seconds then came back on for a few seconds, then shut down for a longer time, then came back on, I left the volume unchanged through this until after second shutdown. I was playing the song Feel It Still, by Portugal The Man, modern alternative music. from my iPhone 6+.
  Reply With Quote

Reply


Cheap TPA3118D2 boards, modding them and everything that comes with itHide 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
Worth modding cheap speakers hixyhicks Multi-Way 98 20th December 2015 06:52 PM
Dyna Mark III monoblocks. Driver boards and some questions on modding. Glacierjohn Tubes / Valves 19 26th February 2015 08:00 PM
Advice modding cheap speakers phillybob Multi-Way 3 11th January 2015 01:40 PM
Modding a cheap practice amp (aka polishing turds) MereTenacity Instruments and Amps 2 11th March 2013 09:42 PM
Modding cheap 5.1 surround decoder from eBay eplegutt Digital Line Level 0 17th July 2011 10:35 PM


New To Site? Need Help?

All times are GMT. The time now is 05:16 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki