How do I properly mount the heatsink to this? - 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 8th January 2013, 12:54 AM   #1
diyAudio Member
 
Mace_Hacker's Avatar
 
Join Date: Feb 2008
Location: Charlotte,NC
Send a message via Yahoo to Mace_Hacker
Default How do I properly mount the heatsink to this?

Hey! I bought this on on ebay to replace the one in my PC speakers...it has the same output transistor - tda2030 but the original one I had was mounted directly to the heat sink...this amp cam with little blue spacer pads and white grommets to insulate the screws....so I am curious....do I have to keep the chips isolated from the heat sink? and if so do I still put some thermal paste between the pads and the heat sink?

below is the link to the amp I am using:

2 1 TDA2030A NE5532 18WX2 36W Stereo Pre Amplifier Amp Board Kit Magic Sound 12V | eBay
  Reply With Quote
Old 8th January 2013, 03:17 AM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
U have to buy silpads and a shoulder washer and screw it to a heatsink mostly made of aluminium.
  Reply With Quote
Old 8th January 2013, 11:25 AM   #3
diyAudio Member
 
Robert Kesh's Avatar
 
Join Date: Oct 2012
It depends if your heat sinks are connected to anything.

If they are connected to the chassis, and the chassis is grounded, and the circuit isn't single supply (or maybe even if it is if you want to control the grounding) then you need to isolate them.

The reason is that the metal tab at the back of the chips (they aren't transistors by the way) is connected internally to the negative power pin on the chip.

IIRC mica pads need thermal grease, silicone ones don't. Make sure you use non electrically conductive thermal grease if you do need to isolate the chips.

Last edited by Robert Kesh; 8th January 2013 at 11:32 AM.
  Reply With Quote
Old 8th January 2013, 11:37 AM   #4
diyAudio Member
 
csom's Avatar
 
Join Date: Dec 2012
Location: Homeless, sweet homeless.
Quote:
Originally Posted by Mace_Hacker View Post
.......this amp cam with little blue spacer pads and white grommets to insulate the screws.........do I have to keep the chips isolated from the heat sink? and if so do I still put some thermal paste between the pads and the heat sink?

below is the link to the amp I am using:

2 1 TDA2030A NE5532 18WX2 36W Stereo Pre Amplifier Amp Board Kit Magic Sound 12V | eBay
As I guessed it from your Photos, there are two regulator ICs ( may be 7815,7915 or LM317,LM337) near the two 6800uFd/25V ...the bigger filter electrolytic capacitors. Perhaps the regulator ICs are used to power up the preamp( NE5532) section with +-15V regulated DC and the TDA2030a ICs are fed with unregulated dual power supply.

So in that case, in my humble opinion, an Isolation, perhaps with TO220 Mica Separator with Thermal Paste, is a must-have if you want to mount the TDA2030As on one large heat sink that is connected to the chasis.

All the very best.
__________________
Warm regards, Som

Last edited by csom; 8th January 2013 at 12:03 PM.
  Reply With Quote
Old 8th January 2013, 12:39 PM   #5
diyAudio Member
 
Mace_Hacker's Avatar
 
Join Date: Feb 2008
Location: Charlotte,NC
Send a message via Yahoo to Mace_Hacker
Ok. From what I gather, As I intend to use one large heat sink, I will indeed have to use the supplied Mica seperators and the plastic grommets to prevent the screws and the cips from making contact. I intend to use standard 'white' thermal paste obtained from Radio Shack and I think this will be fine.

Thanks again so very much for everyone's input.
  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
How to use a multimeter properly. HeavyD'sCustom Car Audio 6 8th May 2009 05:22 PM
How to mount a cartridge properly?? IamKai Analogue Source 5 28th April 2008 03:14 PM
how to ground properly? Denis.BR Chip Amps 4 27th March 2007 07:17 PM
WT: OPA2604 Surface Mount 2x - Will trade DIP mount 2x Destroyer OS. Swap Meet 1 22nd December 2006 06:18 AM
will this work properly? ELiTeHaYDeN Chip Amps 6 30th July 2006 04:46 AM


New To Site? Need Help?

All times are GMT. The time now is 10:23 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