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TAS5715: How to check (audio) output with TAS5715 amp chip

Joanna Tang
Prodigy 55 points
Part Number: TAS5715

Hi,

We are developing a speaker with TAS5715 amplifier chip, the noise will be much louder than allowed when no (audio) output. 

I'd like to know that is there any methods to monitor/check the output? So i can mute on the software when no audio output.

Best regards,

Joanna

  • 0
    TI__Genius 9995 points

    Hi Joanna,

    Can you share your basic spec of your design？PVDD, load, Pout_max.

    May you help to try:

    1. To try to mute the device in idle through register 0x06
    2. To try BD mode through: (0x10) register

    BR

    Alix Wan.

  • 0 in reply to Alix Wan
    Prodigy 55 points

    Hi Alix,

    Thanks for your reply.

    I've tried the two solutions you mentioned, and still failed.

    I'd like to know that is there a register which can check/monitor the IIS signal input? So i can unmute when there is signal input and mute when signal pause or no  signal input.

    Best regards,

    Joanna 

  • 0 in reply to Joanna Tang
    TI__Genius 9995 points

    Hi Joanna,

    TAS5715 can monitor I2S clock error or not but it does not have the register to monitor SDIN.

    Please share your i2c configurations for my reproducing this issue.

    By the way, how is the I2S to TAS5715 generated? Is it from ADC? If yes, can you try AP's I2S?

    BR.

    Alix Wan.

  • 0 in reply to Alix Wan
    Prodigy 55 points

    Hi Alix,

    I2S is not generated from ADC, it's from a CODEC.

    The configurations are generated by the software "TAS5715 GDE" , the configurations we're using is following:

            (0x1B, 0x00),
            (0x03, 0x80),
            (0x10, 0x01),
            (0x11, 0x77),
            (0x12, 0x7F),
            (0x13, 0x77),
            (0x14, 0x7F),
            (0x1C, 0x07),
            (0x0a, 0x30),
            (0x0e, 0xF1),
            (0x00, 0x6C),
            (0x50,0x0f708000),
            (0x25,0x01203145),
            (0x70,0x00800000),
            (0x74,0x00800000),
            (0x46,0x00020623),
            (0x73,0x00800000),
            (0x72,0x00000000),
            (0x77,0x00800000),
            (0x76,0x00000000),
            (0x56,0x00400000),
            (0x57,0x00020000),
            (0x05, 0x00)
    Can we use the other methods to mute for reducing white noise when no audio signal input? 
    Best regards,
    Joanna
  • 0 in reply to Joanna Tang
    TI__Genius 9995 points

    Hi Joanna,

    With your configurations and I2S source from AP, my bench works normally.

    Can you also share schematic for my double check?

    BR

    Alix Wan.