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TAS6422E-Q1: TAS6422E-Q1 review schematic

Lawrence He
Expert 2740 points
Part Number: TAS6422E-Q1
Other Parts Discussed in Thread: TAS6424E, TAS6424E-Q1,

Hi, Support Team

Please help to review schematic as below chart:

1. about PIN22 and PIN23 schematic:

if sametime we use TAS6422E and TAS6424E set up the same address, have any concern?

2. about amp output schematic

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

  • 0
    TI__Mastermind 35855 points

    Lawrence,

    1. They CANNOT have the same address as there will be bus contention.  The two devices must have different I2C addresses.
    2. The LC filter schematic is good.

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    Expert 2740 points

    Hi, Gregg

    Thank you for reply. we have few question as below:

    1. if different MCU to control TI audio amp BUT same address is okay?

    Qualcomm SOC control TAS6424E-Q1 and NXP MCU control TAS6422E-Q1 on the same board.

    2. have other way can reset Audio amp to recover defauft register?

    (if audio amp something wrong cannot to control maybe crashed, we will reset VDD to recover default register.) 

    3, PVDD and VBAT from the same 12v, the schematic have any concern?

    if any suggestion, Please advise me.

    Thanks,

    Best regards,

    Lawrence

  • 0 in reply to Lawrence He
    TI__Mastermind 35855 points

    Lawrence,

    1. If the two devices share the same I2C bus, then they must have different I2C addresses.  Otherwise, they can have the same address.
    2. In the datasheet, you can see in register 0x00, bit 7 will reset the device.  To clear faults, set to register 0x21, bit 7.  You should never need to use a POR event to clear faults.
    3. VBAT and PVDD can be the same voltage.

    Regards,
    Gregg Scott