TDA8931T question

mravlcax · 7th March 2007, 04:39 PM

This is class D amp and my question is has anyone build it and if there were some problems with components? How does it sounds etc...

btw: Does anyone have a pcb??'

Greatings

mravlcax · 7th March 2007, 07:13 PM

Nobody?! Don't tell me that all you do is just modding kits and so. Cause this sucks!!!!

What about making your own pcb at home and assemble it!!!!!
DIYAUDIO YOU DISAPPOINTED ME!!!

FastEddy · 7th March 2007, 07:51 PM

" ... Cause this sucks! ..."

Might it be because the chip sucks?? THD = 10%, 8 or 4 ohms ... maybe there are better chips out there and maybe Phillips has improved this since 2004, but it looks like the best place for this one is in a portable radio.

IVX · 8th March 2007, 05:43 AM

This is just a power comparator chip, with single disadvantage -little power. The chip is ready to give you outstanding specs (THD .00* i.e. 100 times better tripath etc), if you ready to implement it properly.

FastEddy · 9th March 2007, 12:35 AM

Somebody here has the catch phrase: Any op-amp is good as long as the implimentation is done right ... or words to that effect. I suppose you are right, the chip could be made to work in a specific, low power application ... probably not as an output amp except maybe for headphones ...

BWRX · 9th March 2007, 03:04 AM

Quote:

Originally posted by FastEddy
the chip could be made to work in a specific, low power application

Certainly any application that the low power Tripath amps are used in!

This chip is very comparable to the MP7720 except it's in a SO20 package with a couple more features and better thermal dissipation.

mravlcax · 9th March 2007, 12:52 PM

Thanks for all replys but I still won't to know if there is anybody who has a PCB for this chip. Or someone who could draw it. I did my own pcb but it doesn't work

Greatings

BWRX · 9th March 2007, 04:35 PM

I would create a layout for you if I had time. Unfortunately I don't have much of that at the moment. What did you create the layout in? If you made it in Eagle send the files my way and I can take a look at them for you.

mravlcax · 9th March 2007, 04:51 PM

Unfortenately I made it in PCBexpress and then out of anger I deleted it. Well I'm not in the rush with this amp so when you'll have some time please make one.

I'm very thankfull for your attention BWRX.

Greatings

IVX · 9th March 2007, 05:22 PM

mravlcax, try to post your PCB here as .png or .gif. BTW, i would build at this chip UcD like amp.

7th March 2007, 04:39 PM	#1
mravlcax diyAudio Member Join Date: Feb 2007 Location: Ljubljana, Slovenia	TDA8931T question This is class D amp and my question is has anyone build it and if there were some problems with components? How does it sounds etc... btw: Does anyone have a pcb??' Greatings

7th March 2007, 07:51 PM	#3
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	" ... Cause this sucks! ..." Might it be because the chip sucks?? THD = 10%, 8 or 4 ohms ... maybe there are better chips out there and maybe Phillips has improved this since 2004, but it looks like the best place for this one is in a portable radio. __________________ Over compression is a problem with modern CD recordings

8th March 2007, 05:43 AM	#4
IVX diyAudio Member Join Date: Jul 2003 Location: Everywhere (Buddhist's context)	This is just a power comparator chip, with single disadvantage -little power. The chip is ready to give you outstanding specs (THD .00* i.e. 100 times better tripath etc), if you ready to implement it properly. __________________ Best regards, E1.

9th March 2007, 12:35 AM	#5
FastEddy diyAudio Member Join Date: Jun 2006 Location: North Californie	Somebody here has the catch phrase: Any op-amp is good as long as the implimentation is done right ... or words to that effect. I suppose you are right, the chip could be made to work in a specific, low power application ... probably not as an output amp except maybe for headphones ... __________________ Over compression is a problem with modern CD recordings

9th March 2007, 04:35 PM	#8
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	I would create a layout for you if I had time. Unfortunately I don't have much of that at the moment. What did you create the layout in? If you made it in Eagle send the files my way and I can take a look at them for you. __________________ Brian


	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

7th March 2007, 07:13 PM	#2
mravlcax diyAudio Member Join Date: Feb 2007 Location: Ljubljana, Slovenia	Nobody?! Don't tell me that all you do is just modding kits and so. Cause this sucks!!!! What about making your own pcb at home and assemble it!!!!! DIYAUDIO YOU DISAPPOINTED ME!!!

9th March 2007, 12:52 PM	#7
mravlcax diyAudio Member Join Date: Feb 2007 Location: Ljubljana, Slovenia	Thanks for all replys but I still won't to know if there is anybody who has a PCB for this chip. Or someone who could draw it. I did my own pcb but it doesn't work Greatings

9th March 2007, 04:51 PM	#9
mravlcax diyAudio Member Join Date: Feb 2007 Location: Ljubljana, Slovenia	Unfortenately I made it in PCBexpress and then out of anger I deleted it. Well I'm not in the rush with this amp so when you'll have some time please make one. I'm very thankfull for your attention BWRX. Greatings

9th March 2007, 05:22 PM	#10
IVX diyAudio Member Join Date: Jul 2003 Location: Everywhere (Buddhist's context)	mravlcax, try to post your PCB here as .png or .gif. BTW, i would build at this chip UcD like amp. __________________ Best regards, E1.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
newbie with input tran. question and wiring question	imo	Solid State	0	18th January 2006 10:10 PM
Capacitor Question /question on cap	TunaFish	Tubes / Valves	14	12th January 2004 02:23 AM
PS question - tformer question actually	breguetphile	Chip Amps	2	30th May 2003 01:29 PM
old speaker question, bullet midrange question & link to speaker project	wallijonn	Multi-Way	10	5th November 2002 06:03 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read