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TAS6424E-Q1: Question about 48V application.

Leo Ma
Expert 3706 points
Part Number: TAS6424E-Q1

Tool/software:

Hi Expert,

Have a nice day! I have question need your professional support.

For 48V system, customer want to use Step Down solution (Add BUCK between Battery and Amplifier). As shown in BU team’s introduction file:

My question is how to protect amplifier (such as TAS6424E-Q1) shorted to 48V battery? (Customer has test to short devices to battery to simulate some failure case.)

Does BU team have some design guidance or reference design on this solution? (Such as TVS, …)

 

Thanks!

Best Regards,

Leo Ma

  • 0
    TI__Mastermind 45055 points

    Hi Leo,

    When using the TAS6424E-Q1 in a 48Vdc with a step down power supply, we must make sure we do not surpass the Abs Max specifications.  The speaker outputs cannot go past the Abs Max or the output stage could be damaged.  Therefore, the customer must use external protection to meet these short to battery tests.

    Regards,
    Gregg Scott

  • 0 in reply to Gregg Scott
    TI__Expert 3706 points

    Hi Gregg,

    Yes, I get your point. And customer's question is how to design external protection to meet these short to battery test? 

    Do BU team have reference design on this "Step Down solution"? If not, any advice on this? Customer hope TI supply the BOM difference between TAS6424E-Q1 used in 12V system and 48V system.

    Best Regards,

    Leo Ma

  • 0 in reply to Leo Ma
    TI__Mastermind 45055 points

    Hi Leo,

    The document you provided was given as a potential use case for a buck/boost controller using the Class H output of the TAS6584.  We do not have a "reference design" that I know of.  

    Regards.
    Gregg Scott