Hi guys,
Is there any reason I could not parallel the output channels of a TDA7492 amp through a few 0.1R resistors? Each output channel is already bridged internally, so does this present a problem?
http://www.st.com/web/en/resource/technical/document/datasheet/CD00205863.pdf
Is there any reason I could not parallel the output channels of a TDA7492 amp through a few 0.1R resistors? Each output channel is already bridged internally, so does this present a problem?
http://www.st.com/web/en/resource/technical/document/datasheet/CD00205863.pdf
You can parallel the outputs together if you parallel the inputs as well. No problems. Do not use resistor, just tie them together.
Thanks for the replies. Are resistors not need to share the current equally from each output stage?
Petruv, why do you say it might not work? The amps being paralleled are the same, just two channels of a stereo chip.
Petruv, why do you say it might not work? The amps being paralleled are the same, just two channels of a stereo chip.
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Just making sure, I run a mono to both inputs then connect both positives from the speaker out to the speaker?
Correct. You tie the inputs together, the positive outputs together and the negative outputs together. I'd advice to make the connections directly physical and permanent so that you cannot by accident disconnect one of them which would destroy the chip pretty much instantly.
All parts of the chip is already sync'ed to the same internal reference clock (or alternatively to an external clock). There is no possible way the two channels could be out of sync.
How? I'd say it's exactly like any other BTL stereo amp you want to make into a PBTL mono amp.
other amps I am use to dealing with I just slide a switch then use the 2 positives as power for my speakers in bridge mode.
Have to excuse my ignorance, just started reading about class D amps since I bought a sure unit from parts express on a whim.
It's internally bridged on the chip already (hence the BTL, Bridge Tied Load). You cannot bridge an already bridged amp but you can parallel the output to get double the current handling capacity which basically just means you can use lower impedance loads.
sorry to bring up this old thread,but I am trying to do the same thing,so If I wire the 2 speaker outputs in parellel then connect speakes with correct polarity,that is it,Both channels will be tied toghether and output power raised and impedance dropped?
paralleling and bridging are quite different.
I don't know of any TDA related guidance.
National offer a lot of guidance for their BA, PA and BPA series
Worth reading and digesting.
ESP also has quite a lot of info on bridging and paralleling.
Do some research.
I don't know of any TDA related guidance.
National offer a lot of guidance for their BA, PA and BPA series
Worth reading and digesting.
ESP also has quite a lot of info on bridging and paralleling.
Do some research.
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