Low Power Output with TDA1562 - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 11th October 2005, 01:10 AM   #1
diyAudio Member
 
Join Date: Oct 2005
Exclamation Low Power Output with TDA1562

I've recently built a car audio amp with a TDA1562 from Elektor. The diagram I used is this.
The problem is that I don't achieve the 50W RMS that I should get. Instead of that, when I lift the volume up, the LED starts blinking and I get a lot of distortion.

I've read another Thread about it (they say that I've to put Pin 16 to Vp) but no luck.

Thanks
Attached Images
File Type: jpg tda1562.jpg (26.6 KB, 262 views)
  Reply With Quote
Old 11th October 2005, 04:02 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
What it the B+ supply input voltage no load/output?

What is the B+ input voltage when driven hard?

What ohm load?

The chip is only rated for ~20 watts into 4 ohms continuously. The 50 watt rating is only for short term peaks. The lift capacitors will discharge relatively quickly. After they discharge, the max RMS unclipped output power is back to ~20 watts.
  Reply With Quote
Old 13th October 2005, 03:45 AM   #3
michal is offline michal  Canada
diyAudio Member
 
Join Date: Jun 2004
Location: Windsor, ON
Blinking diag LED most likely indicates clipping, see page 8 in the data sheet. You are either providing too much signal on the input or the chip is maxing out (weak power supply or it's just at its limit). That would be my guess.

Anyway, it's a 70W chip... but @ 10% THD.
  Reply With Quote
Old 14th October 2005, 01:11 PM   #4
diyAudio Member
 
sagarverma's Avatar
 
Join Date: Feb 2005
Location: NEW DELHI
reduce the gain to suitable values to avoid clipping.
  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
Car Amp using TDA1562 by Philips Junior Car Audio 14 10th February 2011 05:59 PM
Are my two TDA1562 destroyed?? newbadboy Chip Amps 2 10th June 2009 12:13 PM
Power transformers versus amplifier output power..what is your option? destroyer X Solid State 38 9th May 2009 05:23 PM
Output power VS Peak output power Nordic Chip Amps 5 25th September 2005 05:08 AM
power output calculations, rated power and required power output metebalci Tubes / Valves 7 22nd February 2004 05:49 PM


New To Site? Need Help?

All times are GMT. The time now is 12:28 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