TAS5713 - Inconsistent Error reg answers

Additional information:

I get this "error sequence" in both running and shutdown mode. The amp asserts FAULT low directly at exit shutdown, the supply voltage is 12V and there is a resistive dummy load at the output.

I've noticed that there is a small peak at the output every 1s when in run-mode (not switching), could this be some sort Overcurrent thats kicking in?

Hello Erik:

Did you do an oscillator trim?  What is your initialization sequence?  Please also make sure that the I2S clocks are stable.

Best regards,

Tuan

Hi!

Yes the oscillator trim should be done, and the clocks seems to be stable.

My initialization sequence is (pseudo code):

Drive PDN High

Wait 1ms

Drive RESET high

Wait 14ms

Run Oscillator Trim

Wait 50ms

Configure ASEL as Fault

Configure ICD Registers for BD Modulation

Configure mux Register for BD Modulation

Exit shutdown

Wait 200ms

Replaced the board and now It starts switching atleast. But the switching frequency isn't properly filtered out, there is a 4Vpp ripple on the output (I'm using 10uH inductors and 680nF capacitors)

The polling error reg answers is still the same even though it now is running.

Hello Erik:

I am not sure if you clear out the error register by writing 0 before you read it back.

What is your PVDD level and your load impedance?

Thanks,

Tuan

Yes, the register is written with 0.

PVDD is 12V and the impedance is close to 8Ohms

After a while I realized that I was using a AD-filter for the BD-modulation, information about the output filter in the datasheet maybe would be smart?

Well, soldered in the SSTIMER cap and use the amp successfully in AD-mode...

But still the main question remain, why does the error reg register errors when its running succesfully?

Hi again!

The thing is that it seems to be working just fine, I get a glitch free sinewave, but when I poll the error-register it indicates an error, and as you can se the response  isn't consistent.

I'll try to check my code again.

Greets, Erik