Texas Instruments provides a recommended PCB layout in the TPA721D datasheet, which includes guidelines for component placement, trace routing, and thermal management. It's essential to follow these guidelines to ensure optimal performance, thermal dissipation, and electromagnetic compatibility (EMC).
The input capacitor values depend on the input signal frequency, amplitude, and source impedance. A general rule of thumb is to use a capacitor with a value between 10nF to 100nF, with a voltage rating that exceeds the maximum input signal amplitude. TI also provides a capacitor selection guide in the datasheet.
The maximum power dissipation of the TPA721D depends on the ambient temperature, PCB layout, and thermal management. According to the datasheet, the maximum power dissipation is 2.5W at 25°C ambient temperature. However, this value can be derated based on the actual operating conditions.
The TPA721D has built-in overvoltage protection (OVP) and overcurrent protection (OCP) circuits. However, it's still recommended to add external protection components, such as TVS diodes and current-limiting resistors, to ensure robust protection against voltage surges and current spikes.
The recommended operating voltage range for the TPA721D is 4.5V to 18V. Operating the device outside this range may affect its performance, reliability, and lifespan.
TPA721D datasheet
by Texas Instruments
