Hello everyone,
we currently devolping an Class D amplifier with the sta309a as DSP and TAS5624A from TI for amplification.
We face a issue with random levels of noise appearing after power up sequence.
This may be an issue of wrong configuration during the start. I hope to get any hints what could be wrong...
Here are some more details about the power up sequence:
sta309a recieves I2S with MCLK=24576
Enable power and Reset Pin of sta309a
Enable binary PWM-output mode as DDX damped ternary mode is not supported by TI-chip
Write a set of coefficents and configure all biquads etc.
Configure correct sample-rate and set volume.
Finally enable the TAS5624A
Normal Noise level:
High Noise Level after boot up:
