Tool/software:
The LM4952 is used in the range of VDD from 11.7 V to 15.9 V, but when VDD is approximately less than 12 V, no sound may be output after power-on.
The shutdown pin is controlled externally with a voltage of 3.3 V, but immediately after turning on the power, the GND level is set, and the shutdown pin is raised to the H level (3.3 V) approximately 1 second later.
When VDD is generally greater than 12V, sound is output immediately, but when VDD is generally less than 12V, sound may not be output.
Even if there is no sound output, after waiting for a few minutes, the sound will be delayed and accompanied by a pop sound.
Even if the VDD is less than 12V, it works normally on the first power on after the power has been turned off for a long time, but it often fails on the second and subsequent power on times.
What is the solution for this issue? 
