TDA1554Q Project - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 November 2010, 03:03 PM   #11
diyAudio Member
 
Join Date: Nov 2009
OK pin no.3 and pin no. ? should be connect with 4.7 ohm resistance. input ground is pin no. ? and can i connect pin no.4 with 470uf 16v
  Reply With Quote
Old 9th November 2010, 03:05 PM   #12
diyAudio Member
 
Join Date: Nov 2009
and my amp is just on for 10 sec than osilation for 5 sec than mute. I am using the datasheet application as it is.
  Reply With Quote
Old 9th November 2010, 03:52 PM   #13
LAJ is offline LAJ  United States
diyAudio Member
 
Join Date: Mar 2008
Location: Atlanta Ga. USA
Default The important thing is...

to have a hefty power supply. 12Volts at 5 Amps according to the spec sheet. I've got one from a BA745 I found in the someone's trash but I haven't done anything with it. But I think I will build it as a 4 channel amp. And its a good idea to have a hefty heatsink as well.
  Reply With Quote
Old 9th November 2010, 06:32 PM   #14
diyAudio Member
 
Join Date: Nov 2009
Quote:
Originally Posted by LAJ View Post
to have a hefty power supply. 12Volts at 5 Amps according to the spec sheet. I've got one from a BA745 I found in the someone's trash but I haven't done anything with it. But I think I will build it as a 4 channel amp. And its a good idea to have a hefty heatsink as well.
Currently i am using 12 volt at 300mA just for testing it and heatsink is not attached. I am just turning on it. no input signal provided just 4 ohm 4 inch speaker connected.
  Reply With Quote
Old 9th November 2010, 06:43 PM   #15
LAJ is offline LAJ  United States
diyAudio Member
 
Join Date: Mar 2008
Location: Atlanta Ga. USA
Do you still have 12V after you turn it on? If so your oscillation may be due to insufficient power supply bypass. I'd use at least 1 amp even just for testing (with no signal input.)
  Reply With Quote
Old 9th November 2010, 06:47 PM   #16
diyAudio Member
 
Join Date: Nov 2009
i also tested it on a 140A Lead Acid Battery. I have removed 100nf cap on power supply. because the ossilation was still there with that cap so i removed it
  Reply With Quote
Old 10th November 2010, 01:15 PM   #17
kroto is offline kroto  Indonesia
diyAudio Member
 
kroto's Avatar
 
Join Date: Jun 2009
Location: Bandung
Send a message via Yahoo to kroto
Quote:
Originally Posted by livenicely View Post
OK pin no.3 and pin no. ? should be connect with 4.7 ohm resistance. input ground is pin no. ? and can i connect pin no.4 with 470uf 16v

I mean pin #3 is the signal(input) gnd in the chip, while the input Gnd is the Gnd where your signal came in (like from input connector which is isolated from the chasis).

you don't have to connect signal Gnd and main(power) Gnd via 4r7. but those resistor will help (a little bit) to give the signal line cleaner grounding.

yes you can use a 16V rating cap for pin #4, its only 1/2 the supply voltage.

sorry for my bad English
__________________
  Reply With Quote
Old 10th November 2010, 01:20 PM   #18
kroto is offline kroto  Indonesia
diyAudio Member
 
kroto's Avatar
 
Join Date: Jun 2009
Location: Bandung
Send a message via Yahoo to kroto
Quote:
Originally Posted by livenicely View Post
and my amp is just on for 10 sec than osilation for 5 sec than mute. I am using the datasheet application as it is.
do you mean "then" not "than"?
it could be from your PCb layout. maybe your input line way too close to the output line.
__________________
  Reply With Quote
Old 10th November 2010, 02:01 PM   #19
diyAudio Member
 
Join Date: Nov 2009
I am using polyster capacitor for decoupling. Should i use Ceramic?
  Reply With Quote
Old 10th November 2010, 03:34 PM   #20
kroto is offline kroto  Indonesia
diyAudio Member
 
kroto's Avatar
 
Join Date: Jun 2009
Location: Bandung
Send a message via Yahoo to kroto
mine use polyester too. try 220nF.
try ceramics too.
__________________
  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
TDA1554Q Bridge-Parallel? kroto Chip Amps 6 28th December 2011 02:28 AM
TDA1554Q output pins (+), (-) pra3718 Chip Amps 1 28th January 2009 11:52 AM
TDA1554Q Questions.... DoomPixie Chip Amps 1 29th May 2006 12:27 PM
TDA1554Q Features Wilson2004 Chip Amps 8 15th July 2004 07:28 PM
TDA1554Q and LM1036 question Wilson2004 Solid State 4 13th July 2004 02:56 AM


New To Site? Need Help?

All times are GMT. The time now is 10:24 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