Hi,
as i'm currently drawing pcb for a X-Bosoz with ccs i'm wondering if a heatsink is required? Acording to my cim about 40mA is floating trough each of the diffpair fets and around 80-100ma trough the ccs. 60V * 0,04A = 2,4W for the diff fet and i recon that it should work without a heatsink, right? For the ccs the figures would be 9V* 0.1A = 0.9W.
Any comments?
Thx,
Kari
as i'm currently drawing pcb for a X-Bosoz with ccs i'm wondering if a heatsink is required? Acording to my cim about 40mA is floating trough each of the diffpair fets and around 80-100ma trough the ccs. 60V * 0,04A = 2,4W for the diff fet and i recon that it should work without a heatsink, right? For the ccs the figures would be 9V* 0.1A = 0.9W.
Any comments?
Thx,
Kari
Attachments
Kari,
I think you will definitely want heatsinks. For my BZLS variation I used my aluminum chassis as the heatsink for all my FET's, and the chassis is noticeably warm to the touch when operating. Check the datasheets for the IRF610 for heat transfer from package to air as a check, as I may have been overcautious, but I'm pretty sure I did the check and found the FET's would overheat.
Cheers, Terry
I think you will definitely want heatsinks. For my BZLS variation I used my aluminum chassis as the heatsink for all my FET's, and the chassis is noticeably warm to the touch when operating. Check the datasheets for the IRF610 for heat transfer from package to air as a check, as I may have been overcautious, but I'm pretty sure I did the check and found the FET's would overheat.
Cheers, Terry
That is propably a good idea Gives you flexibilty if you want to move the PSU to a separate chassis. (like me for one) Is the connection pads layed out for terminal blocks?desided to make two boards instead.
Steen.
Kari said:Yep, i will do a psu board also. I was first considering to integrate everything to the same board (cheaper) but desided to make two boards instead.
/Kari
Will you make some boards available to others, Group Buy maybe?
Anthony
Here's the latest update on the board.
I'm currently asking for quotes from different pcb fabs as my current fab has desided to increase their pricing.
I was thinking about black soldermask and goldplated pads is a must. Still the red one looks good to. Any toughts?
/Kari
I'm currently asking for quotes from different pcb fabs as my current fab has desided to increase their pricing.
I was thinking about black soldermask and goldplated pads is a must. Still the red one looks good to. Any toughts?
/Kari
Attachments
Red is hot, with golden pads The board looks greatStill the red one looks good to.
Steen.
BTW If this thread had another title, some more ppl would click in, I think
Banned
Joined 2002
I would take two of each, anytimeI assume two boards are required for stereo plus one power supply board?
Steen.
BTW The red ones would go great with the A-X boards, also in red with gold plating
jleaman said:That my friend looks great. Looks like eagle software also..
Are heat sinks in the library ?
Done with Gentoo Linux and Eagle
And yes the sinks are in the libs.
pinkmouse said:
Just a thought for if you do a group buy, why not extend the rails under the big caps, and add a few more holes. That will allow different caps and different pin outs to be used.
Ok will do. I assume that ppl would use some axial type MKP caps right? I have footprints for AudynCap and Mundorf atm.
/Kari
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