A good PCB layout for the TPA6120A2DWPR involves keeping the audio signal traces short and away from the power supply traces, using a solid ground plane, and placing the device close to the power supply decoupling capacitors. Additionally, using a shielded enclosure and minimizing the length of the input and output cables can help reduce EMI.
The gain setting for the TPA6120A2DWPR depends on the specific application and the desired output power. A good starting point is to set the gain to 20 dB (Rg = 2 kΩ) and adjust from there based on the output power requirements. It's also important to consider the input impedance and output impedance of the device when setting the gain.
The TPA6120A2DWPR requires a well-regulated power supply with minimal ripple and noise. A recommended decoupling scheme includes a 10 μF ceramic capacitor in parallel with a 1 μF ceramic capacitor, both connected as close as possible to the device's power pins.
To protect the TPA6120A2DWPR from overheating, ensure good airflow around the device, use a heat sink if necessary, and avoid operating the device at maximum power for extended periods. Additionally, monitor the device's temperature and shut down the device if it exceeds the maximum operating temperature (150°C).
The recommended input and output coupling capacitor value for the TPA6120A2DWPR is 1 μF to 10 μF, depending on the specific application and frequency response requirements. A larger capacitor value can provide better low-frequency response, but may also increase the risk of oscillation.
TPA6120A2DWPR datasheet
by Texas Instruments
