Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

LED and heat sinks using two layer fr-4

Status
Not open for further replies.

frank_eda

Newbie level 5
Joined
May 5, 2015
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
63
Hello,
I am new to PCB design.
I understand the when using an LED we can use a 2 layer Fr-4 with thermal vias. The question is if I want to add an additional heat sink to the bottom of the PCB will that mean I will have to show the copper? If so, how will this prevent solder wicking when filling up the thermal vias?

thanks
frank
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
21,980
Helped
4,591
Reputation
9,196
Reaction score
4,808
Trophy points
1,393
Activity points
145,109
Hi,

Usually it makes only a small difference, because the heat_transfer_area is much bigger than the LED one.

Klaus
 

frank_eda

Newbie level 5
Joined
May 5, 2015
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
63
Hi,

Usually it makes only a small difference, because the heat_transfer_area is much bigger than the LED one.

Klaus

Hello Klaus,
I am not sure i follow? Please elaborate. Thanks!
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
21,980
Helped
4,591
Reputation
9,196
Reaction score
4,808
Trophy points
1,393
Activity points
145,109
Hi,

I understood the question wether you should use solder stop or not.

I say it makes about no diffdrence in heat transfer, so use solder stop.


Klaus
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
50,020
Helped
14,496
Reputation
29,262
Reaction score
13,426
Trophy points
1,393
Location
Bochum, Germany
Activity points
287,099
I would appreciate a clear question respectively a drawing first. Too many unsaid presumptions.
 

frank_eda

Newbie level 5
Joined
May 5, 2015
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
63
Oops. I replied to the wrong person and quote.

@Klaus - Got it! Thanks!
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top