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 12th December 2005, 10:26 PM   #1
diyAudio Member
 
Join Date: Apr 2004
Location: BC
Default help with design

hey guys, just asking for the experts here to give me a hand..ive designed an LM3886 amplifier of my own, BUT im not sure what wvales to use..the schematic is given below..any help would be much appreciated
Attached Images
File Type: jpg poweramp.jpg (51.1 KB, 262 views)
  Reply With Quote
Old 12th December 2005, 11:56 PM   #2
diyAudio Member
 
Join Date: Sep 2005
Location: Melbourne Florida
Default values?

C6- 1uf
R3-1K
R5-22K
eliminate C8
R4-22.1K
R1-1K
C7- 22uf to 47uf polarized, tantalum, or NP 4.7uf to 22uf ect....
C3&C4 100uf to 1500uf your taste
C1&C2 100nf
Li- 7.4mh
R1- 10 ohm 2 watt
R2-2.7 ohm
C5-1uf
eliminate all component on mute pin. Use a 10k and a 100uf polarized cap - to ground.
  Reply With Quote
Old 13th December 2005, 04:51 AM   #3
diyAudio Member
 
Join Date: Apr 2004
Location: BC
thanks for the suggestions mate...but i have a question..how does the mute pin work?..is there an inbuilt switch inside and i can just link it to a pin of a microcontroller and pull it hi or lo??
  Reply With Quote
Old 13th December 2005, 01:04 PM   #4
diyAudio Member
 
Join Date: Mar 2007
The answer the question about mute pin lies within the datasheet.
  Reply With Quote
Old 13th December 2005, 01:08 PM   #5
diyAudio Member
 
Join Date: Sep 2005
Location: Melbourne Florida
Default mute pin

First I made a mistake, L1 should be .7mh dont know what I was thinking when I typed 7.4???? Just wind 10 turns of .4 enamel wire on the body of the 10 ohn 2watt resistor.
The mute pin needs 20ma at V- to shut off the mute feature. When the pin is open mute is active.
  Reply With Quote
Old 13th December 2005, 10:31 PM   #6
diyAudio Member
 
Join Date: Apr 2004
Location: BC
yes i understood that bit by reading the datasheet..the reason i have the Mosfet in there is because im making a preamp which is microcontroller controlled...therefore i can have input select and mute options...is this feasable?
  Reply With Quote
Old 14th December 2005, 01:25 PM   #7
diyAudio Member
 
Join Date: Sep 2005
Location: Melbourne Florida
Default mute pin

should work, make sure the mos can pass enough current and as long as you can switch it high and low should work withou a problem.
  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
Collated Design Criteria/dimensions for Ariel ML-TL Design talsius Full Range 1 13th October 2011 05:28 AM
Wilson Watt Puppy Clone Design - Design Review Please soundengine355 Multi-Way 8 15th August 2008 02:07 PM
4th order bandpass, wheel well design :) (design inside) TWOJZ Car Audio 28 13th January 2008 02:56 PM


New To Site? Need Help?

All times are GMT. The time now is 01:32 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