A good PCB layout for the TDA7388A involves keeping the power supply lines as short as possible, using a solid ground plane, and placing the input and output capacitors close to the IC. Additionally, it's recommended to use a shielded enclosure and to keep the audio signals away from the power supply lines.
The gain setting of the TDA7388A depends on the specific application and the desired output power. A good starting point is to set the gain to 20 dB and then adjust it based on the output power measurement. It's also important to consider the input impedance and the output load impedance when setting the gain.
The maximum power dissipation of the TDA7388A is 2.5 W. To ensure it doesn't overheat, it's essential to provide a good thermal design, including a heat sink and a thermal interface material. The device should be mounted on a PCB with a good thermal conductivity, and the ambient temperature should be kept below 85°C.
To protect the TDA7388A from overvoltage and undervoltage conditions, it's recommended to use a voltage regulator or a voltage supervisor to ensure the supply voltage is within the recommended range of 9-18 V. Additionally, a transient voltage suppressor (TVS) can be used to protect the device from voltage spikes and surges.
The recommended mute time for the TDA7388A is 10 ms to ensure that the device is fully muted before the power supply is turned off. This helps to prevent any audible clicks or pops during power-on and power-off transitions.
TDA7388A datasheet
by STMicroelectronics
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