Texas Instruments provides a recommended PCB layout in the TPA6135A2RTET evaluation module documentation, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The input capacitor values depend on the input signal frequency, amplitude, and source impedance. A general rule of thumb is to choose capacitors with a value between 1uF to 10uF, with a voltage rating that exceeds the maximum input voltage. TI also provides a capacitor selection guide in the datasheet.
The maximum power dissipation of the TPA6135A2RTET is dependent on the ambient temperature and the thermal resistance of the package. According to the datasheet, the maximum power dissipation is 2.5W at 25°C ambient temperature, but this can be derated to 1.5W at 85°C ambient temperature.
To ensure stability, follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, make sure to decouple the power supply lines with capacitors, and use a low-ESR capacitor for the output filter. TI also provides a stability analysis tool to help designers verify the stability of their design.
The recommended output filter configuration is a 2nd-order low-pass filter with a cutoff frequency between 100kHz to 500kHz, depending on the application requirements. The filter components should be chosen to provide a damping ratio of 0.5 to 1.5 to ensure stability and minimize ringing.
TPA6135A2RTET datasheet
by Texas Instruments
Findchips
