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TAS5630B vs TDA8954
TAS5630B vs TDA8954
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Old 11th November 2013, 05:06 PM   #1
bimbla is offline bimbla
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Default TAS5630B vs TDA8954

Dear all,

Has anyone who has built both of these can share their experiences as far as audio quality, BOM cost, protections, power supply cost/ ease and other thoughts?

I am unable to decide which one to dive into.

Thanks in advance.
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Old 12th November 2013, 02:04 AM   #2
authlxl is offline authlxl  China
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Default TAS5630 vs TDA8954

tas5630 have smart circuits, only single dc power supply necessary, but it need 4 sets of LC filters, cost high. performance better, power output are differential out, output signal better. no POP issue when drive subwoofer,sometime it is hard to drive it smooth with new learner.

Tda8954 need double dc power, circuits are a bit complex, but total cost is low.
I think TDA8950 should better, similar performance and very low price, 3.5usd/pcs enough for tda8950.

compare two chip ,it is easier to make stable amp with tda8954.
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Old 12th November 2013, 09:42 AM   #3
bimbla is offline bimbla
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Thank-you for your comparison summary.
I will follow your experience.

Thanks again and regards.
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Old 17th November 2013, 04:16 AM   #4
bimbla is offline bimbla
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Could you kindly verify and comment on the choice of components for the TDA8954?
I intend to operate it on +/-40V. The reference designators follow the datasheet.

Any thoughts on the implementation of a power supply?
I was planning on making a +/40V; 6A, 12V;1A supply based on the NXP resonant SMPS topology.

The other thought was to use a linear power supply and use a CVT as a pre-regulator.

Can anyone comment if a step-down CVT can be made that will take 90-270Vac and give constant 28-0-28? This would be awesome!

Thanks in advance!
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File Type: zip TDA8954 BOM.zip (6.8 KB, 387 views)
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Old 18th November 2013, 07:07 AM   #5
authlxl is offline authlxl  China
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Quote:
Originally Posted by bimbla View Post
Could you kindly verify and comment on the choice of components for the TDA8954?
I intend to operate it on +/-40V. The reference designators follow the datasheet.

Any thoughts on the implementation of a power supply?
I was planning on making a +/40V; 6A, 12V;1A supply based on the NXP resonant SMPS topology.

The other thought was to use a linear power supply and use a CVT as a pre-regulator.

Can anyone comment if a step-down CVT can be made that will take 90-270Vac and give constant 28-0-28? This would be awesome!

Thanks in advance!
you can show your schematic here, so diyaudio member can help u check it.
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Old 9th December 2013, 03:10 AM   #6
bimbla is offline bimbla
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Default TDA8954 Sch and BOM is attached

Hello again,

Sorry, I had to figure out the approach I want to take and that took a while.
Can we start at the amplifier?

As per your suggestion, I have decided to go with TDA8954.
I want to eventually power it with +/-24V/ 10.5A supply.
We will come to the power supply part later.

In the attachment is the schematic that I will be using.
It is the datasheet application note from NXP. The values of the components are given. However the type of capacitors (ceramic, polyester, electrolytic etc.) is not given. I have made assumptions in the attached excelsheet.

Kindly take a look and advise.

Thanks in advance and regards,

bimbla.
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File Type: zip TDA8954 Sch & BOM.zip (79.6 KB, 501 views)
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Old 18th December 2013, 08:27 AM   #7
spare_parts is offline spare_parts  United States
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Audio input caps should be film type, through hole may be better in terms of microphonics

All power supply decoupling caps should be ceramic X7R and surface mount very close to pis of chip

All large value ripple filter caps should, of course, be electrolytic 105 degree temp and over rated voltage is best

The output filter caps should be high voltage poly film

The best output inductor I have found is ICE POWER or SANGAMI ferrous box shielded types


It would be a good idea to share your PCB layout before you commit to manufacturing it to get advice. I have produced several amps based on this series of chips and can help you.
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Old 18th December 2013, 08:31 AM   #8
spare_parts is offline spare_parts  United States
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bootstrap caps should be ceramic too. I have tried NPO/COG and X7R and found no apparent difference. Traces should be short for low inductance.
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Old 25th December 2013, 12:40 AM   #9
bimbla is offline bimbla
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Thank-you for your suggestions.
I will come back with the layout.
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Old 27th December 2013, 11:19 AM   #10
bimbla is offline bimbla
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Thanks for the suggestions on output inductors!!
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