TAS5731 Single BTL / PBTL Configuration

Hi Kato San,

In order to get a mix of (L+R)/2 In the output, You could use the output mixer of channel 1 (Register 0x51), this way you may configure the BQ (you will have access up to 8 BQ/Ch) and DRC. In order to have the mix of (L+R)/2, you need to configure Register 0x51 as follows:

!       [50%  Ch1  ] [50%   Ch2 ] [  0%   Ch3]  
X51 00 40 00 00 00 40 00 00 00 00 00 00

This way you will have the mixed output in the output channel 1. 

For BTL mode:

• PWM SHUTDOWN GROUP and PWM OUTPUT MUX Registers could be left with the Default value. 
• PBTL pin (8) should be set as LOW. 

For PBTL mode:

• PBTL pin (8) should be set as HIGH. 
• Out_A should be tied to Out_B and Out_C to Out_D before the LC filter
• PWM SHUTDOWN GROUP (0x19) register's value should be:
  • X19  3A 
• PWM OUTPUT MUX (0x25) register should be configured as
  •  X25 01 01 23  45

DRC and BQs should be configured and  powered up independently.

Best Regards,

  -Diego Meléndez López
   Audio Applications Engineer

Hi Diego-san,

Thank you for your response.
For the BTL mode, don't we need to configure 0x52 register such as 0x51 register ?

Best regards,
Kato

Hi Kato-San, 

It will depend which channel is selected as the output. If you want to use Channel 1, register 0x51 must be modified. If Channel 2 is preferred, Register 0x52 is the one that should be changed.

Best Regards,

  -Diego Meléndez López
   Audio Applications Engineer

Hi Diego-san,

Thank you for your quick response.
Should we configure either of 0x51 register and 0x52 register to mix L/2 and R/2 if using the BTL mode with Out_A and Out_B ?
Could you please give me your advice just in case ?

Best regards,
Kato