TAS5755M: Asking for the TAS5755 PBTL and the DRC setting

SHH,

1. Can you show the difference you are seeing?

2. Please refer to figure 45 in the datasheet. Depending on the need for individual Biquads on the Left and Right channels and whether the stereo mix occurs before or after the BQ, many different routes can be used.

Regards,

-Adam

Hi Adam,

please refer to the comparison for the Peak and RMS dump setting. you can use the GUI to see this difference.

Customer checked the figure 45 already. But they are not sure how to do the PBTL EQ and R/L setting.

The requirement is that they need to mix the R/L, set the high-pass filet and do the DRC.

Please let us know what the path is fit for the design requirement.

BR,

SHH

SHH,

Peak calculates the power limits slightly higher, RMS is more conservative.

For easy L/R summing and single BQ set for both, we will use the input path from mixer 0x61, through Mux 0x21, BQ 5A and 5B, through DRC2, then mixer 0x52.

Mixer 0x61 will allow a ratio of the left and right channel. For 50%  L and 50% R, set 0x61 as 0x 00 40 00 00 00 40 00 00.

The datasheet for 0x21 is wrong, this needs to be set to 00-00-42-03 to select the output of mixer 0x61.

BQ 5A and 5B can be used for any filtering.

I am still verifying the DRC setup, I will get back to you tomorrow.

Lastly we will use mixer 0x52 for the output, set this to 00-00-00-00-00-00-00-00-00-80-00-00. 

Regards,

-Adam