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Class D Switching Power Amplifiers and Power D/A conversion

Class D Stereo Amp in Mono?
Class D Stereo Amp in Mono?
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Old 16th May 2019, 01:21 AM   #41
forestsgump is offline forestsgump
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Mates, doctormord, FauxFrench, Saturnus ...

What if the Class-D is a TPA3250 (ie. FX502S-pro), can apply Parallel the amp.
(Split the signal and use it as input on both channels and then parallel the output, plus to plus, minus to minus.)?
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Old 16th May 2019, 04:36 AM   #42
chermann is offline chermann  Austria
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Quote:
Originally Posted by forestsgump View Post
Mates, doctormord, FauxFrench, Saturnus ...

What if the Class-D is a TPA3250 (ie. FX502S-pro), can apply Parallel the amp.
(Split the signal and use it as input on both channels and then parallel the output, plus to plus, minus to minus.)?
nop! the pcb layout is set to BTL - so for PBTL you have to change the coils and caps. at the TI datasheets you can see the schematic diagram for BTL and PBTL

chris
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Old 16th May 2019, 05:43 AM   #43
FauxFrench is offline FauxFrench  France
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Quote:
Originally Posted by forestsgump View Post
Mates, doctormord, FauxFrench, Saturnus ...

What if the Class-D is a TPA3250 (ie. FX502S-pro), can apply Parallel the amp.
(Split the signal and use it as input on both channels and then parallel the output, plus to plus, minus to minus.)?

As Chris rightfully says, in practice you will have to convert it to PBTL which requires changes on the board itself.
Connecting two amplifier channels in parallel requires amplitude and phase of the two channels to be fully alike. Else, you will have cross currents.
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Old 16th May 2019, 01:11 PM   #44
forestsgump is offline forestsgump
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Thks Chris & FauxFrench ~ you are always so readily to advice, helping from destruction!
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Old 16th May 2019, 07:10 PM   #45
chermann is offline chermann  Austria
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Originally Posted by forestsgump View Post
Thks Chris & FauxFrench ~ you are always so readily to advice, helping from destruction!

hi forestsgump


are you not happy with the fx502spro? you use a 30Vpsu...with other opamps

i remember you have still this pop on/off topic...
chris
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