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TPA3116D2 – About slave mode

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Guru 21045 points
Other Parts Discussed in Thread: TPA3116D2

Hi,

Is outside clock input(400kHz～1.2MHz) to Sync pin possible if TPA3116D2 is Slave mode?

My customer wants to use the frequency that TPA3116D2 can't set in "AM0, 1, 2 pin".

Ex . fosc = 800kHz etc..

 

Regards,

Kanemaru

  • 0
    TI__Mastermind 37045 points

    Hi Kanemaru,

    The SYNC freq should be in the range of 100KHz +-10% for optimal operation. The internal PLL will provide the desired PWM siwtching freq based on the AM pins settings.

    reg,

    Paul Chen.

     

  • 0 in reply to user5276421
    Guru 21045 points

    Hi,Paul

     

    Thank you for answer.

    Ｉ understood. thank you very much.

     

    Regards,

    Kanemaru

  • 0 in reply to Hide
    Guru 21045 points

    Hi,Paul

    Thank you for the information.

    I have two questions I want to ask.

     

    [Q1]

    If it is the frequency that is setable in "AM0, 1, 2", is the outside clock input to Sync pin possible?

     

    Ex. Outside clok input = 376kHz～424kHz (AM2=0 , AM1=0 , AM2=0)

       Outside clok input = 1128kHz～1278kHz (AM2=1 , AM1=0 , AM2=0) etc..

     

    [Q2]

    Can TPA3116D2 change the setting of "AM0, 1, 2" during operation?

    (Does TPA3116D2 not malfunction? If there is any inconvenience, please tell me.)

     

    Regards,

    Kanemaru

  • 0 in reply to Hide
    TI__Mastermind 37045 points

    Hi Kanemanu,

    The external clock input needs to be 90KHz - 110KHz range for optimal operation for all AM modes. The AM0, 1, 2 will determine the output PWM switching freq, For example, with external clock = 100KHz, AM0=L, AM1=L, and AM2=L, the output swtiching freq is 400KHz.  TPA3116D2 will not malfunction when the AM mode is changed during operation. However, we recommend MUTE the amp first before the change for pop/click consideration.

     

    reg,

    Paul.

     

  • 0 in reply to user5276421
    Guru 21045 points

    Hi, Paul

     

    Thank you for answer.

    Ｉ understood. thank you very much.

     

    Regards,

    Kanemaru