i would like to feed an usb cheap amp (5v operating) with a balanced buffer done with lm124 and virtual earth done with resistors. The aim is to use the stereo amp with bridged configuration on a single speaker.
do you think its gonna work this ? any other advice for the projects ?
regards
do you think its gonna work this ? any other advice for the projects ?
regards
http://www.diodes.com/_files/datasheets/PAM8403.pdf
These are typical of the very cheap ($1!) stereo class D USB amplifiers available. However, the manufacture vetoed the idea of configuring the L & R channels in bridge mode. "Conclusion: You cannot bridge the PAM8403 (as you can't bridge two pairs of differential outputs)" Diodes Inc. also recommended against using the two outputs in parallel.
Linears like TDA2822 work on USB supply voltage too and they can be configured in bridge but hardly worth the effort for the power increase (3 dB or 30% increase in volume. http://www.st.com/web/en/resource/technical/document/datasheet/CD00000134.pdf
These are typical of the very cheap ($1!) stereo class D USB amplifiers available. However, the manufacture vetoed the idea of configuring the L & R channels in bridge mode. "Conclusion: You cannot bridge the PAM8403 (as you can't bridge two pairs of differential outputs)" Diodes Inc. also recommended against using the two outputs in parallel.
Linears like TDA2822 work on USB supply voltage too and they can be configured in bridge but hardly worth the effort for the power increase (3 dB or 30% increase in volume. http://www.st.com/web/en/resource/technical/document/datasheet/CD00000134.pdf
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