Texas Instruments provides a recommended PCB layout in the TPA6040A4RHBR evaluation module documentation, which includes guidelines for component placement, trace routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The gain setting depends on the input signal level and the desired output power. The TPA6040A4RHBR has a gain range of 12 dB to 30 dB. Consult the datasheet's gain vs. frequency graph and the application note 'TPA6040A4RHBR Audio Amplifier Gain Setting' to determine the optimal gain setting for your specific use case.
The maximum power dissipation of the TPA6040A4RHBR is dependent on the ambient temperature and the thermal resistance of the PCB. According to the datasheet, the maximum power dissipation is 2.5 W at a junction temperature of 150°C. However, it's recommended to perform thermal analysis and simulation to determine the maximum power dissipation for your specific application.
The TPA6040A4RHBR has an internal undervoltage lockout (UVLO) circuit that disables the device when the supply voltage falls below 2.5 V. For overvoltage protection, it's recommended to use an external voltage regulator or a transient voltage suppressor (TVS) diode to limit the voltage to the recommended maximum rating of 5.5 V.
The recommended input coupling capacitor value is 1 μF to 10 μF, depending on the input signal frequency and amplitude. A ceramic or film capacitor with a low equivalent series resistance (ESR) is recommended to minimize signal attenuation and distortion.
TPA6040A4RHBR datasheet
by Texas Instruments
