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Class D Switching Power Amplifiers and Power D/A conversion

TPA3251d2
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Old 16th July 2015, 06:10 PM   #11
Nisbeth is offline Nisbeth  Denmark
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TPA3251d2
PCB layout description in the data sheet seems quite detailed - who's got a spare weekend to put something together?

/U.
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Old 16th July 2015, 06:55 PM   #12
gmarsh is offline gmarsh  Canada
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That's a pretty awesome looking chip.

Yes, I'll make an amplifier card for it
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Old 16th July 2015, 07:02 PM   #13
29285 is offline 29285  Europe
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If i were an engineer...
...and you were a lady
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Old 16th July 2015, 09:53 PM   #14
Buehgemeiste is offline Buehgemeiste
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That's a pretty awesome looking chip.

Yes, I'll make an amplifier card for it
you are the man!!!!
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Old 17th July 2015, 09:49 AM   #15
doctormord is offline doctormord  Germany
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Default TPA3251d2

Quote:
Originally Posted by gmarsh View Post
That's a pretty awesome looking chip.

Yes, I'll make an amplifier card for it

Please let me know what heatsink solution you choose, I'm still unsure. BGA heatsinks are quite expensive.
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Old 17th July 2015, 11:42 AM   #16
doctormord is offline doctormord  Germany
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Nice, my samples just arrived from TI. TPA3251d2
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Old 17th July 2015, 12:00 PM   #17
Hammett is offline Hammett  United States
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Originally Posted by gmarsh View Post
That's a pretty awesome looking chip.

Yes, I'll make an amplifier card for it
Excellent news!
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Old 17th July 2015, 11:02 PM   #18
Lo_Tse is offline Lo_Tse  Canada
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Originally Posted by gmarsh View Post
That's a pretty awesome looking chip.

Yes, I'll make an amplifier card for it
Awesome!! May be a completely built amp card. This is something that I could really use. The 3116's output is a bit low for my 83 db speaker.

Regards,
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Old 18th July 2015, 12:37 PM   #19
gmarsh is offline gmarsh  Canada
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Originally Posted by doctormord View Post
Please let me know what heatsink solution you choose, I'm still unsure. BGA heatsinks are quite expensive.
Haven't made my mind up yet.

Heatsinks are a mechanical pain in the ***. I might do something like mount the card to an aluminum plate with the TPA on the bottom side - I'd have to "swiss cheese" the plate a bit to allow clearance for component leads, I'll play around with the idea over the next few days.
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Old 18th July 2015, 04:13 PM   #20
doctormord is offline doctormord  Germany
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Okay. I think i'll go for a "Fischer Elektronik" SK612 37.5 with off-centered mounting drills (Heatsink performance is about 3.4K/W then) and split decoupling (1u 1206/1210 + 100n 0612 reversed).

With the infos from here:

http://www.xilinx.com/support/docume...es/xapp623.pdf

The placement of the 1u isn't that critical.
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