Hi,
I designed a TAS5631DKDR Board for Single-Ended Application and a TAS5631BPHDR Board for BTL Application, both designs‘ schematic diagram are the same as the recommend design in the Users' guide. But I met the same questions in all the designs, my /OTW /OTW1 /OTW2 /SD are always in low levels, indicates overtempreture warning or overload/ undervoltage warning, and the ready pins also always in low level. I replaced the TAS5631BPHDR to TAS5614APHDR(another IC with lower output power, which shares the same packages with TAS5631B), but the warnings are still existing.
All the VDD pins to Ground are 12 Volts, and my output power stage supply is 48V(I also try to replace the supply into 30V, but the result is unchanged).
My PCB layout design follow the PCB layout of the TAS5631B reference design, including the capacitors and resistors material and value, as well as the positions that they are placed in the PCB. I also designed a switch to control reset pin. By the way, I didn't give the input any PWM signals into my Board, it's in no input state.
I have tried place 8 ohm(rating in 12W) speaker load/ 500 ohm resistor as load connected to the output and also tried no load condition, but I am not sure whether my /OTW warnings are due to the wrong load selection.
Could you please give me some advices for debugging my board? I am really sad because I have never seen it works normally until now.
Regards,
Hu
