Dear
I have tested my project with class D amplifier TPA2005 and TPA2012.
The project is very simple, as belows:
audio signal input (mainly smartphone music player, mp3 player) -> amplify -> speaker.
My prototypes are working well, but I want to add "shutdown function when no audio input signal."
I did some tries with comparator, transistor etc....but not satisfactory.
Could you recommend any simple methods?
I want to make this as simple as possible to save PCB size and manufacturing cost.
(MCU is also not available.)
Thanks very much in advance.
