"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets - Page 2 - diyAudio
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Old 20th September 2011, 11:58 AM   #11
opc is offline opc  Canada
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That's spot-on! Follow that method and it'll make my life much easier.

I'll compile the usual list once there are a few more people listed.

Cheers,
Owen
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Old 20th September 2011, 12:13 PM   #12
MrSlim is offline MrSlim  Canada
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Hi Owen,
Put me down for 2 boards. I know I'll be kicking myself if I don't jump on the opportunity now.

MrSlim 2 pcb

thanks
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Old 20th September 2011, 12:55 PM   #13
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What's with all the interesting projects lately?
I'm broke!

and of course I am in for:
CafeNoir 4x pcb and 2x parts kits

thanks
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Old 20th September 2011, 12:58 PM   #14
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Im in for 2 pcbs. Buy Canadian Eh.
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Old 20th September 2011, 12:59 PM   #15
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I would love to try out it someday, so 2 boards!
I really like these LME chips, I think I have already one sample
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Old 20th September 2011, 01:07 PM   #16
JLH is offline JLH  United States
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Is anyone concerned about how close the Mosfets are spaced? Looks like you will have a serious problem with thermal crowding with your heat sinking.
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Old 20th September 2011, 02:26 PM   #17
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Owen, put me in for 4 boards
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Old 20th September 2011, 02:40 PM   #18
qusp is offline qusp  Australia
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qusp 4 x PCB only
L-Train 2 x parts kit and 4 x PCB
Ferrari 4 x PCB only
holminator 2 x pcb and 2 x parts kit
1543 7 x PCB only
mr Slim 2 x pcb only
Cafe Noir 4 x pcb and 2 x parts kits
dillmeister 2 x pcb only
Spacehead 2 x pcb only
multisync 4 x pcb only
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35 x pcbs
6 x parts kits

ive counted the pcbs in the kits, easier to keep them separate, so perhaps when you make the post, list the pcb and part separately, so if you want a full kit with parts, list as
1 x pcb
1 x parts kit

hahaha seriously guys, did anyone read what i wrote and then opc confirmed it would make his life easier?


Quote:
That's spot-on! Follow that method and it'll make my life much easier.

I'll compile the usual list once there are a few more people listed.

Cheers,
Owen
I tried mate, i'm going to collate the ignorers orders one more time hehe, probably they just didnt see it because your post took us over the next page


@ JLH, no not really worried, if people are worried they can just wire them in

Last edited by qusp; 20th September 2011 at 02:45 PM.
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Old 20th September 2011, 02:41 PM   #19
opc is offline opc  Canada
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Hi JLH,

At these power levels I'm not overly concerned about it. They are closer than I would have liked, but hanging them off opposite sides of the board resulted in very poor routing.

An easy trick would be to bend the leads so that both devices are spread a little farther apart, or alternatively just mount the devices where you need them and run the proper wire leads to each pin (large wires required for D-S).

As long as the heatsink has a reasonable thickness, having the devices 1" apart or 0.1" apart makes very little difference overall. The limiting values will be the thermal resistance between the package and the sink, as well as the thermal resistance to the extremes of the heatsink. In reality, you'd have to get the devices several inches apart to really improve the situation.

Does anyone know of a good thermal simulator that would help model this?

Regards,
Owen
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Old 20th September 2011, 03:05 PM   #20
QRikard is offline QRikard  Sweden
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Please sign me up for:
QRikard 2x kits
QRikard 4x PCB

Any tips for a good solution on the power supply? Is there a neat way to get the 10V voltage drop to the mosfets without using two transformers?
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