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

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Tda1541a psu
Tda1541a psu
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
Thread Tools Search this Thread
Old 8th May 2003, 01:51 PM   #1
tonitze is offline tonitze  Singapore
diyAudio Member
Join Date: Feb 2003
Location: singapore
Default Tda1541a psu

I just swapped the 3 psu of my tda1541a from 317 to Tl431 hoping to get better result only to get worst result instead. What might have happen to my tl431 with 10uf oscon at the output.

Is this 10uf oscon cap adequate for the tda?

Has anyone come across this problem?

Any idea what's best for tda1541a?
  Reply With Quote
Old 8th May 2003, 05:50 PM   #2
HeadSh0T is offline HeadSh0T  Canada
diyAudio Member
HeadSh0T's Avatar
Join Date: Sep 2002
Location: Toronto, Canada
I'm using a 220U, 15U, and 0U1 for my TDA1543 dac. When placed at the pins, I find that this work just fine. Could be too much capacitance but one TL431 datasheet recommends >100U capacitance if placed further away than a few inches away from the load.

If the TL431 is right by the pins, then 15U or so should be enough..

Don't forget the film bypass cap..
  Reply With Quote
Old 8th May 2003, 09:16 PM   #3
guido is offline guido  Netherlands
diyAudio Member
guido's Avatar
Join Date: Mar 2002
Location: diepe zuiden
-15V is analog supply,

+5 and -5 are digital supply.

Try oscon and tl on the digital, leave the 317 on the analog supply. The many caps from the divider should go to analog gnd.
Connect agnd and dgnd at the chip.

Would be interested in the result:
-only 317
-only tl
-as above

Still looking at options for my dac, so this is only my guess !!

  Reply With Quote
Old 9th May 2003, 02:05 PM   #4
tonitze is offline tonitze  Singapore
diyAudio Member
Join Date: Feb 2003
Location: singapore
Thinking that the 10uf oscon is un-adequate, I add another 10uf directly at the pin and bypass the ref to cathode resistor with 100n doesn't solve the problem.Even my non- diyer friend says it sound bad compared to the previous one with 317. What i can the dac with Tl431 sound quite slow and bloated with excessive bass . While with 317, speed is quite apparent with distinctive note especially at the mid to high.So now the dac ended up with 317 again.Maybe try Quido's idea later. The problem now is that the pcb is in no good condition to solder and unsolder due to too much experiment with psu.
  Reply With Quote


Tda1541a psuHide 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
// TDA1541A PCB already tube-lover Swap Meet 109 19th June 2010 06:16 PM
Wtb: Tda1541a deskmate88 Swap Meet 0 21st March 2007 12:07 PM
One more TDA1541A DAC HeadSh0T Digital Source 25 7th September 2005 07:26 PM

New To Site? Need Help?

All times are GMT. The time now is 11:21 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio