• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 681 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TAS5754 Auto mute

Abel Bergeron
Prodigy 65 points

Hi,

I am working with a TAS5754 for a project. I need to make the amplifier go into power save mode using the zero detect function.

In the data sheet i see that R59 and R65 need to be set according to my needs. That is the value i'm using : 

// 59 5 sec zero detect
{ 0x3B, 0x66 },

// 65 A and B auto mute
{ 0x41, 0x03 },

The zero detect never work. While using the pure path console 2 I realize it might be cause by my analog audio input. Because with the PPCM i can get the zero detect to work with USB audio input (flag R120 switch to auto muted) but not with the line1 audio input. And when probing the SDIN of the TAS5754 i see that, with line1 input, there is alot of movement on the pin and it might cause the amplifier to never see it as a zero. Even if the music is not playing.

Might be cause by noise on the analog input?

Has anyone tested the auto mute function of the TAS5754 with an analog audio input? 

Thanks

  • 0
    TI__Guru 52115 points
    Hi Abel,

    The auto mute should work if the consecutive zero samples are present in the i2s input. I agree with you that your issue is most likely due to the non-zero input even when the music is not playing.

    What is the device that converts the analog input to i2s data? I suggest you look into that device and make sure the i2s ouput is zero when there is no music playing.

    Andy