I am having startup issues, that i hope someone can see the issue or solution to, that i will explain:
If i turn the bluetooth module on with an external supply, connect to it with phone, wait a few seconds and then turn the smps+amp on, everything is fine and plays nicely.
If i connect the bluetooth module to the smps +5v, and turn on mains power to smps, the irs2092s amp starts up but makes terrible noise on the speaker output, gets hot, and draws loads of current…? Sometimes the module even breaks.
The only way i have got the system to work at the moment is by having the bluetooth module already on and connected to a device. Im not sure why.
I need to design some sort of staggered startup system, this js my idea but im not sure if it would work:
I could use an rc timer that runs on the 5v, which turns on two relays after ~10 seconds which lets the +/-90v flow to the irs2092s.
This way, the bluetooth module is already on before the irs2092s.
Would it be safe to suddenly relay the irs2092s with +/-90v? I assume the modules onboard capacitors would charge up very quickly.
