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DRV5033: Hall sensor failure

Annie Liu
Genius 10295 points
Part Number: DRV5033

Hi Team,

When the magnet is close to the Hall sensor, the normal Hall sensor will close and output a low level. The actual defective Hall sensor is always in a disconnected state and outputs a high level. The customer replaced a good Hall sensor on the same motherboard and it works normally. He replaced the broken Hall sensor with the same motherboard, and it worked abnormally again. He tested 2pcs motherboards with the same results.

Regards,

Annie

  • 0
    TI__Expert 7830 points

    Hi Annie,

    Thanks for posting to the sensors forum.

    • Can you share the customer's schematic and layout for the DRV5033?
    • Were any tests performed on the board before the abnormal behavior was observed?
    • Which orderable part number of the DRV5033 is the customer using?

    If the customer wishes to initiate a return, they should follow the directions found on this web page: https://www.ti.com/support-quality/additional-information/customer-returns.html 

    Best regards,

    Jesse

  • 0 in reply to Jesse Baker
    TI__Genius 10295 points

    Hi Jesse,

    Jesse Baker said:
    Can you share the customer's schematic and layout for the DRV5033?

    Jesse Baker said:
    Were any tests performed on the board before the abnormal behavior was observed?

    No testing was done on the board prior to the unusual behavior.

    Jesse Baker said:
    Which orderable part number of the DRV5033 is the customer using?

    It is DRV5033AJQDBZR/DRV5033AJQDBZT.

    Jesse Baker said:
    If the customer wishes to initiate a return, they should follow the directions found on this web page

    The customer said that TI does not accept the analysis of returned defective products. TI said it might be an application problem. However, customer testing has confirmed that it is not a problem with the application. The customer hopes that TI can accept the analysis of DRV5033AJQDBZR defective products. May I know how to coordinate? At the same time, the customer also stated that they had taken out the original part for testing alone, and there was no problem of influence from other lines.

    Regards,

    Annie

  • 0 in reply to Annie Liu
    TI__Expert 7830 points

    Annie,

    The customer can initiate a return by following the directions on this page: https://www.ti.com/support-quality/additional-information/customer-returns.html

    There are different directions depending on where the parts were purchased from, and these are all described on the page linked above. The different cases are:

    • The parts were purchased from an authorized TI distributor --> customer should contact the authorized distributor to initiate the return
    • The parts were purchased directly from TI or the TI store --> complete the Customer Product Return Form (CPR).

    Best regards,

    Jesse

  • 0 in reply to Jesse Baker
    TI__Genius 10295 points

    Hi Jesse,

    Previously, the customer had already filled out the return form 

     https://www.ti.com/support-quality/additional-information/customer-returns.html

    and received a response due to an issue with their application. The customer service said it can be posted on this forum, and someone will reply. Do we have any way to confirm and resolve the customer's issue?

    Regards,

    Annie

  • 0 in reply to Annie Liu
    TI__Expert 7830 points

    Hi Annie,

    What was the issue with the customer's application? Were the parts purchased through TI.com or through an authorized TI distributor?

    The customer's schematic looks ok. If the part is damaged in some way, further analysis is needed to confirm and potentially identify the cause of the damage, and that analysis is provided through the customer return process. For this process, the devices must have been purchased directly from TI or from an authorized distributor.

    Semiconductor products purchased outside of TI’s authorized distribution network, including through brokers, independent distributors, or online marketplaces (sometimes referred to as the “gray market”), may be counterfeit, modified, beyond TI’s recommended shelf life, or improperly stored or handled. Accordingly, TI does not provide warranty coverage or customer support for semiconductor products purchased outside of TI’s authorized distribution network.

    Best regards,

    Jesse

  • 0 in reply to Jesse Baker
    TI__Genius 10295 points

    Hi Jesse,

    Customers contacted the customer support center and were told there was an issue with the application. The customer confirmed that it had been tested and there were no problems with the application. They purchased it from TI authorized distributor-European ARROW. Therefore, the customer needs TI to conduct further analysis to confirm that this component is damaged. 

    When the magnet is close to the Hall sensor, the normal Hall sensor will close and output a low level.

    The actual defective Hall sensor is always in a disconnected state and outputs a high level.

    And he replaced a good Hall sensor on the same motherboard, and it works normally. Then he replaced the broken Hall sensor with the same motherboard, and it worked abnormally again. He tested 2pcs motherboards with the same results.

    Regards,

    Annie

  • 0 in reply to Annie Liu
    TI__Expert 7830 points

    Annie,

    Thank you for providing that info. Because the parts were purchased through Arrow, the customer will need to contact Arrow to begin the product return request, as indicated below. We do not handle customer returns through E2E. I cannot comment further on the reason for the behavior the customer is seeing. The schematic appears to be ok and it sounds like they did an ABA swap to confirm the behavior they were seeing from the Hall sensor.

    Best regards,

    Jesse

  • 0 in reply to Jesse Baker
    Prodigy 10 points

    Hello Jesse,

    We've submitted the product request as per your suggestion. Case no. CPR No. CPR241096875.

    But the return was not accepted for the reason that "the failure rate is abnormally high, suspect application issue".

    Per communication with Annie, there is no problem with our schematic.

    Would you please help us with this issue? 

    Thanks in advance.  

  • 0 in reply to user5508119
    TI__Expert 7830 points

    Hi,

    It looks like customer support asked for additional information "How many units still left in this reel 3046110ZEV?" Are you able to provide this information to them by clicking the "View return summary" button?

    You mentioned on this thread that you tested another DRV5033 and it worked. How many other units have you tested? Have you seen this behavior on any other units you have tested? This might be important information to include in the CPR form if you have not already.

    Best regards,

    Jesse