Regulated or no regulated PSU? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 16th July 2003, 02:21 PM   #1
Higo is offline Higo  Argentina
diyAudio Member
Join Date: Feb 2002
Location: Argentina
Question Regulated or no regulated PSU?

Hi guys:
Im designing my first GC based on LM3886TF (Po=50W, VCC=+/-35V, Icc=3.5A, Av=20). I read in the specifications manual that the lm3886 has excellent power supply rejection and does not require a regulated power supply. But I have a pair of LM317T/337T and 2N3055 and 2N2955 and I was thinking to build a regulated PSU . Will It improve the performance of the GC if a use a regulated PS? Is it worth the effort?
Any advice will be appreciated.
There is no emotion; there is peace.There is no ignorance; there is knowledge.There is no passion; there is serenity.There is no death; there is the Force.
  Reply With Quote
Old 16th July 2003, 03:34 PM   #2
Pedja is offline Pedja  Serbia
diyAudio Member
Join Date: Jun 2002
Location: Belgrade
Default Regulated

Hi Marcelo,

I built the regulation somewhat different but it will probably work well also the way you mentioned.

I uploaded my updated GC page just a few hours ago and it is covered now.

  Reply With Quote
Old 16th July 2003, 04:38 PM   #3
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
I wouldn't bother with regulation of the power supply, just select the correct transformer for the application -- you don't need to go overboard on filter caps either. When you regulate you are just adding more "huffing and puffing" via the feedback circuit in the LM317 and burning watts via the '3055/'2955's.

build the power supply section first and see what it actually capable of delivering work, then backwards to determine the feedback resistor (gain) for the specific load impedance -- National Semi has the procedure on the PDF for the device (at least they have it for the LM3875).

the best advice that I have seen is to keep the lead length short -- I have found that the devices I've built with surface mount resistors work wonderfully (I've built about 8 so far with a variety of chips -- 1876, 3875, 3886.)

  Reply With Quote


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
Regulated PSU?? MikeFarad Solid State 4 12th July 2007 10:41 PM
Regulated or non-regulated SMPS longitude Class D 5 8th May 2007 03:02 PM
Need a little help with my first regulated PSU jarros Power Supplies 16 2nd May 2005 11:28 PM
Regulated PS Kit cantskienuf Chip Amps 7 24th September 2004 03:20 AM
Regulated PSU Help.. jleaman Analogue Source 9 26th July 2004 12:36 PM

New To Site? Need Help?

All times are GMT. The time now is 10:44 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2