A good thermal design is crucial for the TDA2003AH. STMicroelectronics recommends a 2-layer or 4-layer PCB with a solid ground plane on the bottom layer, and a thermal pad connected to the heat sink. Keep the thermal pad away from the audio signal traces to minimize noise coupling.
To minimize noise and distortion, use a well-regulated power supply, decouple the power pins with 10uF and 100nF capacitors, and keep the audio signal traces short and away from the power traces. Also, use a low-ESR capacitor for the bootstrap capacitor (C2).
The maximum power dissipation of the TDA2003AH is 2.5W. However, this value can be derated based on the ambient temperature and the thermal resistance of the PCB. Consult the datasheet for more information on thermal derating.
Yes, the TDA2003AH can be used in a bridged configuration to increase the output power. However, this requires careful consideration of the power supply voltage, output impedance, and thermal design. Consult the application note AN1046 from STMicroelectronics for more information.
Use a voltage regulator or a voltage supervisor to ensure the supply voltage remains within the recommended range (8V to 18V). Add overvoltage protection (OVP) and undervoltage protection (UVP) circuits to prevent damage from voltage transients or brownouts.
