TPA3111D1: During the operation of the device, there is suddenly no sound.

Tool/software:

In the process of using the TPA3111D1, there is a problem: during the operation of the device, there is suddenly no sound.

The schematic diagram is as follows, loaded with a 4Ω speaker:

Here are a few questions I would like to confirm

1. Is there a relationship curve between temperature and output efficiency? The fault is prone to low temperatures of -20°C.
2. Is PLIMIT a power limiting function, is it the average power or instantaneous power that is restricted?
3. How does the chip determine the SC failure? Is it to detect the voltage and current at the output? What is the threshold for SC failures?
4. TThe typical output power is 10W, regardless of signal quality, is there a maximum and minimum index?