I created the below PCB. IT is designed as 1x BTL, 2x SE with option to make 2x BTL. When I power it up I hear a hum that intensifies until it cuts out.
Power rails remain stable.
Reset is floating.
Fault pin remains HIGH, even though the sound cuts out.
If I keep reset pulled to GND during power up and then release it (manually) it never makes sound nor passes signal (seems like it doesn't start up).
Disconnected the TPA3244 signal inputs from the buffers. Issue remains the same.
Please see the video here:
Could my choice output inductor cause this problem? They are a generic toroid power inductor - https://lcsc.com/product-detail/Through-Hole-Inductors_Sunltech-Tech-SLT080125T150MTB_C908343.html
Here is my schematic and layout.
Thanks for any help!
(Before someone says it - those are the op-amp and regulator symbols built in to EasyEDA, and while they are horrible I could not bother to draw my own.)