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Class D Switching Power Amplifiers and Power D/A conversion

TPA3221
TPA3221
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Old 23rd April 2021, 01:31 PM   #81
peroz is offline peroz  Slovenia
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Join Date: Mar 2014
I need dual stereo.


Can't find one just like these JST. I'm guessing it is a 3,96mm pitch? I'll just get some thin enough not to bump into anything and use them.
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Old 28th April 2021, 09:35 AM   #82
bushellj is offline bushellj  United Kingdom
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Join Date: Mar 2013
Location: Chudleigh, Devon
Quote:
Originally Posted by gigigirl View Post
OK, Sorry for dumb question. But why does the TPA3255 use teo Op-amps, but from what I can see the 3221 does not?.

Cheers
The TPA3255 requires balanced inputs and the two Op Amps are usually included included to convert an SE Input signal to Balanced to drive the amplifier chip. They also provide a buffer / Pre Amp stage that may be required for low level signals often provided by consumer sources. The TPA3255 is expecting to see about 2 volt input signal.

The TPA3221 can accept either Balanced or SE inputs directly so does not require Op Amps to drive the amplifier chip. Also the TPA3221 has more gain so can work with lower input signal levels.

The TPA3221 is aimed at “Consumer” products with the lowest component count whereas the TPA325x is more aimed at professional / Audiophile products and requires more external circuitry and power supplies in order to produce a working amplifier.
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I provide PA equipment for Charities and local Clubs and Societies for their meetings inc. ChudFest.
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Old 28th April 2021, 09:50 AM   #83
daniboun is offline daniboun  France
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Join Date: Nov 2019
Location: Lyon (France)
It is true but both chips can work on the same way.
My TPA3221 dual mono is using some OPA1652.
You could imagine a TPA3255 with a bypassed Buffer, some DIYers already did it.

TPA3221 :

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Last edited by daniboun; 28th April 2021 at 09:53 AM.
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Old 29th April 2021, 08:57 PM   #84
hansueli is offline hansueli  Switzerland
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Join Date: Oct 2017
Hei guys just found this new amazing tpa3221 finished amp
US $166.00 50%OFF | Fever digital power amplifier TPA3251 ultra-clear HIFI digital power amplifier, high power and small size
Fever digital power amplifier TPA3251 ultra clear HIFI digital power amplifier, high power and small size|Home Automation Kits| - AliExpress
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Old 29th April 2021, 09:08 PM   #85
daniboun is offline daniboun  France
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Join Date: Nov 2019
Location: Lyon (France)
It is not a TPA3221 but 3251, I already shared the link )

A few month ago you could buy the module @ 50 euros ! the price of the finished amp makes non sense for me !

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Last edited by daniboun; 29th April 2021 at 09:14 PM.
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Old 10th June 2021, 08:56 PM   #86
notakosan is offline notakosan  United States
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Join Date: Dec 2020
How does TPA3221 compare with dual TPA3116? I haven't found much information in terms of this comparison.
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