Hi Team,
My customer tested the switch frequency on OUTX under Ra=10 kohm and Rb is open. The LRCLK is 48kHz. According to datasheet, the FSW should be 48*8 = 384 kHz. But we found the output frequency is 432 kHz. we can't figure out it. could you please help comment on this? thanks.
BR,
Eric Jin
Hi Roy,
Thanks for your reply. The LRCLK is 48 kHz exactly. not 54 kHz. We removed the inductance and tested the OUT to GND waveform showed as below for your reference. do you have any suggestion for us to check? thanks.
Hi Eric,
This seems kind of weird because the switching frequency is now 9 times of LRCLK, which is not listed in the datasheet.
Let's try to narrow the possibilities down by doing the following:
1. If you have not tested with other boards, please do so.
2. Try with another resistor combination and see if it gives the desired switching frequency. ( The highlighted combination below).
3. Run this test again without downloading any configuration to TAS5766M to see if it's caused by the configuration.
Thank you!
Roy Hsu
Texas Instruments
