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TAS5414B-Q1: SCH review

Amelie Zheng
Genius 10865 points
Part Number: TAS5414B-Q1

Hi team,

My customer now use TAS5414BTDKDRQ1 and could you kindly help to check SCH?

When TAS5414B powerIC as a slave, is it necessary to provide a clock signal through OSC_SYN from outside?

TI TAS5414BTDKDRQ1.pdf

  • 0
    TI__Mastermind 19250 points

    Hi Amelie,

    The schematic looks fine. OSC_SYN can be from outside source, but it must meet device requirement.

    Regards,

    Derek

  • 0
    Prodigy 100 points

    Dear TI,

    we use two TAS5414B powerIC as slave in our product, if we don't use outside source(OSC_SYN), is it possible?  

    Meanwhile if we don't use outside source(OSC_SYN), could you pls recommand how to design circuit？

    Thank you very much if you can give feedback in time because the project is urgent.

  • 0 in reply to Jeremy Li
    TI__Mastermind 19250 points

    Hi Amelie,

    Yes, it is ok. You can refer FOSC_SYNC spec requirement in datasheet, page 10.

    If you do not use outside source(OSC_SYN), you should set device to master mode. Or the clock source is from another master device, for master device OSC_SYN is output.

    Regards,

    Derek

  • 0
    Prodigy 100 points

    As my understanding, it must use outside source(OSC_SYN) as slave device. Is the understanding correct?

  • 0
    Prodigy 100 points

    Dear TI,

    accoding to the communication, we plan to design one powerIC config as master device, and another powerIC config as slave device. the master device output clock to slave device.

    meanwhile the device as master or slave doesn't affect the i2c interface, the outside i2c master device also can't write/read the master poweric device and slave powerIC.

    could you pls help to check the design and understiong corrct or not?

    Thank you very much if you can give feedback in time because the project is urgent.

  • 0 in reply to Jeremy Li
    TI__Mastermind 35855 points

    On the schematic delete C57122 and R53227, and short I2C_ADDR pin to ground.  This will allow the I2C_ADDR pin to be set accurately and IC57001 to be the master.  On IC57000 delete C57120 to make this device a slave (I2C address for Slave3).  Net AMP1_SYNC and AMP2_SYNC should be connected together.  The Master will provide the oscillator for the slave, by setting bit D7 in Register 0x0B.  The slave device needs an oscillator to function, it does not need to be enabled in Register 0x0B, bit D6, as it is automatic. 

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    Prodigy 100 points

    Dear Scott,

    Got it, thank you very much for your support!

  • 0 in reply to Jeremy Li
    Prodigy 100 points

    Dear Scott,Derek,

    we use two TAS5414Bs in our product, one is master and another is slave, the master provide the clock to slave. could you please help to provide the register configuration both master and slave to me?

    Thanks!

    Best Regards

    Jeremy

  • 0 in reply to Jeremy Li
    Prodigy 100 points

    Dear TI,

    The output P and M waveform is shown below during power on. After then there is no any signals. Could you help to tell me the reason?

    The syn clock is 3.3MHz can be detected from master.

    the register configuration is shown below:

    master:                                                                                       

    register address register data
    0x8 0xAA
    0x9 0xF0
    0xA 0x4D
    0xB 0xDF
    0xC 0x00
    0xD 0x00
    0x10 0x05

    slave:     

    register address register data
    0x8 0xAA
    0x9 0xF0
    0xA 0x0D
    0xB 0x5F
    0xC 0x00
    0xD 0x00
    0x10 0x05
  • 0 in reply to Jeremy Li
    TI__Mastermind 35855 points

    This was taken offline to help directly.

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    Prodigy 100 points

    Dear Scott,

    Could you help to give me some suggestions about why the THD+N and noise is too big?

    Thanks!

    Jeremy

  • 0 in reply to Jeremy Li
    TI__Mastermind 35855 points

    Jeremy,

    Use the FFT function on you AP.  This will tell you the frequency of the noise.  Noise and THD this is usually a set up issue or a ground loop issue.

    Regards,
    Gregg Scott