The recommended PCB layout for the TDA8708A involves keeping the input and output tracks as short as possible, using a ground plane to reduce noise, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a dedicated ground plane is recommended.
To ensure stability, make sure to follow the recommended component values and PCB layout. Also, ensure that the input and output capacitors are of high quality and have low ESR. Additionally, the device should be decoupled from the power supply using a 10uF capacitor in parallel with a 100nF capacitor.
The maximum input voltage that the TDA8708A can handle is 40V. However, it's recommended to operate the device within the specified input voltage range of 8V to 36V to ensure reliable operation and to prevent damage to the device.
The TDA8708A is rated for operation up to 150°C junction temperature. However, the device's performance and reliability may degrade at high temperatures. It's recommended to derate the device's output current and voltage according to the temperature derating curve provided in the datasheet.
To troubleshoot issues with the TDA8708A, start by checking the input voltage, output voltage, and output current. Verify that the device is properly decoupled and that the PCB layout is correct. Check for signs of overheating, such as excessive temperature or burning smells. Use an oscilloscope to check for oscillations or noise on the output.
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