The input to the TPA3136D2 is coming from the analog headphone output of the SGTL5000 audio codec.
I have used a combination of the TPA3136D2EVM schematic and Fig 19 from the TPA3136D2 datasheet
to put this schematic together. The class D amplifier drives one 4 Ohm 3W loudspeaker. Let me know your
feedback on this circuit.
Edited to add: The SGTL5000 codec is on the Toradex iMX7 Colibri SOM board. Only the analog
headphone outputs are available.
Thanks,
Priya