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TPA3255 - all about DIY, Discussion, Design etc.
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Old 17th July 2018, 03:44 PM   #751
doctormord is offline doctormord  Germany
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What i mean is, that i can't see any through-soaked solder at the vias coming from the powerpad at the other topside.


TPA3255 - all about DIY, Discussion, Design etc.-fx502spro-disassembled-heatsink3-jpg
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Old 19th July 2018, 09:07 PM   #752
irs20957 is offline irs20957  Russian Federation
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Testing my LLC PSU and amp TPA3251
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Old 20th July 2018, 05:52 AM   #753
chermann is offline chermann  Austria
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Quote:
Originally Posted by doctormord View Post
What i mean is, that i can't see any through-soaked solder at the vias coming from the powerpad at the other topside.


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hi doc

yes this is correct i remember ...no soldering soak through this holes.
tpa3250....fx502spro
is it possible to rework (solder) this easy? i guess not....
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Old 22nd July 2018, 08:56 AM   #754
Cradle22 is offline Cradle22  Germany
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Hi!

I am in the process of building a six channel TPA3255 amplifier (three "chinese" tpa3255 modules with three switch mode supplies).

I would like to use a speaker protection and turn on delay module.
I have some UPC1237 stereo protection modules at hand, however, they use a common ground between the left and right channels.

Is that ok for the bridged stereo TPA3255 module, or will I have to use seperate modules for each channel?

Thank you,

Arndt
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Old 22nd July 2018, 09:32 AM   #755
sybic is offline sybic  Poland
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I used a trivial system

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Old 22nd July 2018, 10:43 AM   #756
Cradle22 is offline Cradle22  Germany
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But I already have four of those modules, bought especially for my setup.

IMG_20180722_105725.jpg


The big SMPS is for an additional IRS2082 subwoofer amp... I need to fix a bent cap, so it is not mounted right now.
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Old 22nd July 2018, 03:00 PM   #757
chermann is offline chermann  Austria
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Hi Sybic


you wrote nichicon fine gold if i remember but..


Which input caps do you use?
Did you try different types, brands?


thanks
chris
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Old 22nd July 2018, 03:25 PM   #758
sybic is offline sybic  Poland
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In this system, I have not tested others.
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Old 22nd July 2018, 03:38 PM   #759
chermann is offline chermann  Austria
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Quote:
Originally Posted by sybic View Post
In this system, I have not tested others.
thanks for your quick response.


If i look at the TI LC Guide.....Your output filters are 10 but 680nF
is it a compromise for 6 ohms?
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Old 22nd July 2018, 04:36 PM   #760
sybic is offline sybic  Poland
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exactly, 680n is at 6 ohms.
I assumed that for 8 and 4 there will be a compromise OK
1uF I have only for L and R channel
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