5W amplification at low voltage - 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 30th May 2012, 03:45 PM   #11
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
Maxim has some nice low power IC's as well, like the MAX98310.

MAX98309, MAX98310 Mono 1.4W Class AB Audio Amplifiers - Overview
  Reply With Quote
Old 31st May 2012, 12:34 AM   #12
diyAudio Member
 
Join Date: Oct 2009
Location: New Zealand
Quote:
Originally Posted by albert384 View Post
Dear DiYAudio,

I'm completely new in here and in audio circuits as well. Thus, I thought this community might be helpful.

I'm designing a circuit running on battery from (3 to 9 volts) which must have a 5W audio amplification stage. I've been browsing the internet quite a lot for such amps but no one was running under 12volts.

Do you have any ideas ?

I wish you a nice day and thank you for all the knowledge available on that website.
Use a voltage booster - dc-dc converter from low to high. Plenty of them and pretty cheap on eBait and you can use any high quality amp behind it (e.g. LM1875 - cheap as well on oBoy)

Mini DC to DC Converter Boost Step Up Module Wide Voltage Input 2.5-25V to 5-25V | eBay

Last edited by AmadeusMozart; 31st May 2012 at 12:44 AM.
  Reply With Quote
Old 31st May 2012, 07:08 PM   #13
diyAudio Member
 
Join Date: Feb 2011
http://www.nxp.com/documents/data_sheet/TDA7056B.pdf

this chip might do the trick without any booster, on 9 volts.
  Reply With Quote
Old 31st May 2012, 11:42 PM   #14
Minion is offline Minion  Canada
diyAudio Member
 
Join Date: May 2006
Location: Cowican Bay , vancouver island
Yesterday i was looking through my parts bin looking for something to build a low power stereo amp for my MP3 player to run in my car , like an Ipod dock type thing ....
Anyways I found a HA13001 chip in my parts bin , it is appearantly a 2 x 5w into 4 ohms amp chip that runs off of 12v DC which is perfect for my car .....

So I did up a home made PCB from the datasheet curcuit and hooked it up to my MP3 player and a set of home theater speakers and a 12v dc PSU and it sounds pretty good , way better than the LM386 amps i have built ......

I don"t think they make them anymore but you can find them on the net , if you can find one I can supply you with a simple PCB design if you want to etch a pcb at home ......
Attached Images
File Type: jpg ha13001 pcb-002.JPG (82.2 KB, 174 views)
  Reply With Quote
Old 1st June 2012, 10:58 AM   #15
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
ICs designed for automobile use are generally single polarity supply from ~8Vdc to 16Vdc.
These are ideal for using battery power, except that excessive current draw may be a problem.

TI have just released TPA2025D1 : 1.9W into 8r0 @ 1% THD from +3.6Vdc
__________________
regards Andrew T.
  Reply With Quote
Old 5th June 2012, 10:35 AM   #16
diyAudio Member
 
Join Date: May 2012
Thank you to all of you for your answers, i think i have enough infos now ! This helps me a lot for my project. I hope I will be able to help you, if one day you need it.
  Reply With Quote
Old 11th December 2012, 12:18 AM   #17
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Quote:
TI have just released TPA2025D1 : 1.9W into 8r0 @ 1% THD from +3.6Vdc
Nice to know.
So nice, that I rushed to download and *read* its datasheet
Cool chipamp ... but not to be even mentioned here ... except as a curiosity.
Light years away from any "DIY".
Why?
Well, for starters , its pinout is BGA (Ball Grid Array), forget hand soldering there.
Even more, the package is match head sized; 1.5mm x 2 mm
Oh well, too good to be true (for us I mean)
So it looks like I'll have to go back to the chicken farm, light the kerosene lamp up, and grab a couple of my obsolete TBA820, which at least are through hole, DIP8, and can provide 3.6W RMS bridged out of a 9V supply.
Oh well.
  Reply With Quote
Old 11th December 2012, 05:43 AM   #18
diyAudio Member
 
Join Date: Sep 2009
schematics diagrams amplifier circuits 5w
Attached Files
File Type: pdf A000277_5 Watt Stereo Amplifier Data Sheet.pdf (562.7 KB, 25 views)
File Type: pdf schematic_mk190.pdf (26.0 KB, 16 views)
  Reply With Quote
Old 31st December 2012, 04:23 AM   #19
diyAudio Member
 
Join Date: Nov 2004
Location: Florida
AN7522N will do the job nicely! I see them in Stereo CRT TV's all the time. (I salvage TV's for scrap and parts)

http://www.lemona.lt/LIUSE/Pdf/AN7522N.pdf

It's a 2-channel BTL stereo amp designed for low voltage.
I built an amp with one, and on only 9V it will fill the room with sound. It's easy to mount on a heatsink, and does not get very hot. Even though the pdf specs @ 8 ohms, I can drive 4 ohms easy with a bigger than stock heatsink, and it's still a relatively small heatsink. 6 ohms should be easy and loud!
__________________
You can call me Mad Professor, building crazy experiments in my Electronics Workshop
  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
Voltage Differential Amplification Stee Solid State 60 12th August 2008 09:54 PM
Relation between voltage gain and dB amplification klitgt Solid State 9 18th August 2005 01:17 PM
Curent Vs Voltage amplification in Alephs AR2 Pass Labs 26 21st December 2004 10:57 PM
power amplifier with one-stage voltage amplification alex0 Solid State 5 7th February 2004 01:02 PM


New To Site? Need Help?

All times are GMT. The time now is 09:15 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