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Class D Switching Power Amplifiers and Power D/A conversion

TPA3250 somebody is listening?
TPA3250 somebody is listening?
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Old 17th January 2019, 07:33 AM   #781
chermann is offline chermann  Austria
diyAudio Member
Join Date: Jan 2017
Location: Vienna
Originally Posted by doctormord View Post
The IC shown there is a TPA3251 with thermal pad on top.
but its nevertheless a very good idea
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Old Yesterday, 08:44 AM   #782
Splkn is offline Splkn
diyAudio Member
Join Date: Nov 2018
Originally Posted by chermann View Post
from post 775

so the tpa 3250 has a gain of 26db so with this opamps config i get about 33db so its 7db more gain

is that correct?

so the volume knob- potentiometer is a voltage divider for the input and the inverted opamp has a gain about 7db....correct?

which values should i find an the pcb to get this? can some fresh brain and expert help me?

thanks chris
On - forum.vegalab.ru they are engaged in the Hypex UcD amplifier and write:
«Completely excluded OU as well as WG. The signal is fed directly to the modulator. Gain is enough for comfortable listening directly from the source. The input impedance is not enough, but the output buffer of the source pumps. This option is more like.» They have an input impedance of the amplifier (modulator) of 10 kom, the TPA3250 has a resistance of 24 k per channel. Or 12kom with two channels connected in parallel.
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Old Yesterday, 09:49 AM   #783
chermann is offline chermann  Austria
diyAudio Member
Join Date: Jan 2017
Location: Vienna
Hi Splkn

First .....Thank you that you try to explain me ...but i didn´t get your point.
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