We now use the TPA3128 amplifier. In normal operation, there will be POP sound when the MCU pulls down the SD foot. The schematic diagram is shown in the attachment.
In the following cases, there are POP sounds:
1. The larger the input signal, the larger the POP sound of TPA3128.
2. Disconnect the input separator capacitor of TPA3128 and lower the SD foot to hear the soft POP.
3. Since it is a single-end input, POP is also included in the single-end rotation difference of the op-amp.
How do you get rid of the POP sound in this case?
