Boards in 2 GitHub repositories, designed in KiCad, that use the TPA3221DDVR by Texas Instruments (0.02% 1-Channel、2-Channel 105W×2@4Ω、112W×2@3Ω、208W×1@2Ω、88W×2@4Ω、100W×2@3Ω、170W×1@2Ω 108dB 2 Pairs Differential Inputs 25mA 60dB 7V~30V 90% Class D Enable/shutdown function、Overvoltage protection HTSSOP-44-6.1mm Audio Amplifiers ROHS). See how each wires it, with its parts, size, README and files; the TPA3221DDVR’s symbol, footprint and pinout are on its own page.
rocketreading44/multiroom-amp
Four-zone stereo amplifier: 4 × TI TPA3221 at 28 V (about 30–40 W per channel into 8 Ω), fed by a Raspberry Pi 5 + HiFiBerry DAC8x, with a Raspberry Pi Pico as the controller.
