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I'm working on implementing an audio amplifier into a circuit design, and I am trying to understand the output configuration for the speaker using the TPA0253. I will be using a 8 ohm, 1W speaker for my design. For my project, I plan on using only a mono speaker with the input being stereo. So I chose this IC because I wanted something that would easily convert stereo to mono.

From what I understand, the output to the speaker uses a highpass filter. If I was to use a single speaker without a headphone connection, how would I draw the schematic, and would I need a highpass filter on both the mono+ and mono- pins?

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If I was to use a single speaker without a headphone connection, how would I draw the schematic

enter image description here

Page 2 of the data sheet above shows you how to do this (see above).

Or if you want to use your schematic look for the nodes Lo/Mo- and Ro/Mo+ and connect the node called STEREO/MONO to Vdd via 100 kohm.

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  • \$\begingroup\$ For the filtering, would I connect the speaker as shown in the diagram? At the bare minimum, would I just need a capacitor in series with the Mo+ pin and the positive terminal of the speaker, and just connect the negative terminal of the speaker to Mo-? Sorry, I'm not very experienced in audio circuits. \$\endgroup\$ – Jayvin Street Aug 4 '20 at 16:09
  • \$\begingroup\$ Just connect the speaker as shown in the diagram. \$\endgroup\$ – Andy aka Aug 4 '20 at 16:14

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