lme49830 chipamp board - 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 6th December 2012, 03:32 AM   #1
diyAudio Member
 
Join Date: Dec 2012
Location: One Tree Hill, S.A.
Red face lme49830 chipamp board

Hi Guys,
Anyone know where I can get more information on this ebay item
LME49830+K1530/J201 classAB Mono Power Amplifier Board 300W Full Assembled | eBay.
In particular, how to setup the correct chip bias voltage, what size toroidal transformer and whether the same voltage can be used for chip (pre driver) and drivers(only need 100 Watts)
  Reply With Quote
Old 6th December 2012, 06:21 AM   #2
diyAudio Member
 
bobodioulasso's Avatar
 
Join Date: May 2008
As you can see LME chip works perfectly when supplied at the same voltage as power stage.
For 100w, twin outputs and a 2x36Vac to 2x40Vac transformer will do giving 2x50Vdc to 2x56Vdc when rectified and filtered.
As for VA rating, from 200VA to 400Va for two channels.
http://www.ti.com/lit/an/snaa058a/snaa058a.pdf
  Reply With Quote
Old 10th December 2012, 09:46 AM   #3
diyAudio Member
 
Join Date: Dec 2012
Location: One Tree Hill, S.A.
Thanks Bobodioulasso that is a most useful document on the chip itself. It will be interesting to see what the final result sounds like.
  Reply With Quote
Old 10th December 2012, 12:10 PM   #4
diyAudio Member
 
bobodioulasso's Avatar
 
Join Date: May 2008
Sounds very nice.
I have built several amplifiers using LME49810 and 49830.
Some with single pair outputs, one with 2x5 Sanken pairs.
It combines the precision of a chip and the clean power of discrete.
And you can try as many different output stages as you like.
I like to use a pcb for the chip and point to point for the output stage obtaining a very versatile rig.
I have been using classA amps for years and have been tired of low efficiency.
Really these chips are outstanding.
  Reply With Quote
Old 10th December 2012, 10:09 PM   #5
diyAudio Member
 
Join Date: Dec 2012
Location: One Tree Hill, S.A.
hi Bobodioulasso,

I note that in my reading on the many threads on this chip implementation, that there are many many options (BJTs and Mosfets) considered as the power elements. Panson in particular seems to have devoted an extraordinary effort in analysis of best components. Is there a summary page/thread of developed wisdom?

greenKnight
  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
Chipamp Beta Selector Board JL889 Chipamp 1 4th December 2011 11:52 PM
LM3875 chipamp board incl power supply lgreen Swap Meet 1 11th December 2009 06:23 PM
Olle:s first chipamp with LM3886! Board layout? ollebolle Chip Amps 22 31st March 2009 01:08 PM
Lme49830 nickarsow Chip Amps 94 18th March 2009 08:57 AM
Lme49830 enzedone Solid State 6 21st February 2008 03:26 PM


New To Site? Need Help?

All times are GMT. The time now is 08:56 AM.


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