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Original question:

TAS5630B: TAS5630 failure(IC permanently damaged)

TAS5630PHD2EVM: TAS5630b, Device Failure

Nik Andrews
Prodigy 30 points
Part Number: TAS5630PHD2EVM
Other Parts Discussed in Thread: TAS5630B

Hi,

We have been using the TAS5630b in a product for 6 years and are now having issues with the device failing.

I am just wondering if any other customers are also experiencing a similar issue.

Thanks,

Nik

  • 0
    TI__Mastermind 28100 points

    Hi Nik,

    Can you tell us what the issues you all are seeing as well as the schematic and device conditions such as PVDD and impedance of the load. 

    Best Regards,

    Robert Clifton

  • 0 in reply to Robert Clifton56
    Prodigy 30 points

    GVDD: 12Vdc

    PVDD: 50Vdc

    Load Impedance: 3Ohms

    Please keep in mind, we have build hundreds of this product over the past 6 years and haven't experienced this issue consistently.

    Class D amp.pdf

  • 0 in reply to Nik Andrews
    TI__Mastermind 28100 points

    Hi Nik,

    Thanks for sharing the parameters and the schematic. I see you have added some additional protection circuitry on the outputs to prevent much overshoot and undershoot. 

    Can you describe the issues that are causing the device to fail? The more information the better. 

    Best Regards,

    Robert Clifton

  • 0 in reply to Robert Clifton56
    Prodigy 30 points

    The device fails while Idle, (not driving the load at full or partial power).

    The products are produce by our production department and pass all test procedures (loaded, unloaded). The products are placed through an ESS process and pass. While sitting idle on the bench with a load attached (latent failure, very difficult to reproduce, happens inconsistently) the idle current will start to climb and the device goes into shutdown. At this point the device is dead..

    Idle Current begins to increase and in most cases the 12V GVDD_AB shorts to ground.

    Replacing the device restores all product functionality.

    We have doublecheck the output and have confirmed an model of the product produced in 2016 vs this year and all wave forms are equivalent. 

    A  batch of products produced (QTY 5) are exhibiting similar behavior. In one out of 5 instances the PVDD A channel cratered as well as the GVDD_AB.    

  • 0 in reply to Nik Andrews
    TI__Mastermind 28100 points

    Hi Nik,

    Thank you for clarifying. The best course of action would be for us to examine these parts in person. I would recommend submitting a return form as well as reading the general customer return page, in case you aren't familiar with the process. 

    Customer Return Main page: https://www.ti.com/support-quality/additional-information/customer-returns.html

    Link for the return form: https://www.ti.com/productreturns/docs/createReturn.tsp

    I will also send you an email with one of my colleagues who can further assist with this matter. 

    Best Regards,

    Robert Clifton