The recommended PCB layout for the TDA8929T involves keeping the power supply lines as short as possible, using a star-ground configuration, and placing the decoupling capacitors close to the IC. Additionally, the audio signal lines should be kept away from the power supply lines to minimize noise and interference.
To optimize the thermal performance of the TDA8929T, ensure good heat dissipation by using a heat sink or a thermal pad, and keep the ambient temperature below 85°C. Also, minimize the power dissipation by optimizing the output power and using an efficient power supply.
The maximum allowed output power of the TDA8929T depends on the supply voltage and the load impedance. According to the datasheet, the maximum output power is 2 x 30W into 4Ω or 2 x 20W into 8Ω, but it's recommended to derate the output power to ensure reliable operation and minimize thermal stress.
To protect the TDA8929T from overvoltage and undervoltage conditions, use a voltage regulator or a voltage supervisor to ensure that the supply voltage remains within the recommended range of 12V to 18V. Additionally, use a voltage clamp or a transient voltage suppressor to protect the IC from voltage spikes and surges.
The recommended input impedance for the TDA8929T is around 22kΩ to 47kΩ, depending on the application and the desired gain. A higher input impedance can result in a higher gain, but may also increase the noise and distortion.
