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  • TI Thinks Resolved

TPS7A49: NR/SS voltage below specified

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Replies: 5

Views: 132

Part Number: TPS7A49

Hello,

One of TPS7A4901DGNR have about half (0.6V) of required bandgap voltage reference level (1.2V). Is it manufacturing defect or can come from design flaws. I use another 2 similar parts for producing 5V and 2V5, while broken was for 17V5. I assume it was broken because after resoldering it with the same new IC, the problem is eliminated.

Regards,

  • HI,

    If you resolder the IC that appeared to be broken, do you get the same results? This may be a result of the device not being soldered properly. 

    Regards,

    John Cummings 蔣康明
    Texas Instruments 德洲儀器
    Johncummings@ti.com

    Please click the "Resolved" link at the bottom of this post if I have answered your question.

    Thank you,

  • In reply to JCHK:

    Yeah, although I do so without pad (power) soldering, but other ICs work well this way. I can post here a measurement of voltage input and NR/SS pins.

  • In reply to Junior_Decigner:

    I would recommend sending the part in for failure analysis so we can see what may have happened. 

    Do you have a local sales contact to work with?

    Regards,

    John Cummings 蔣康明
    Texas Instruments 德洲儀器
    Johncummings@ti.com

    Please click the "Resolved" link at the bottom of this post if I have answered your question.

    Thank you,

  • In reply to JCHK:

    OK, I am not sure whom to address. There are some distribution partners and a local office.

  • In reply to Junior_Decigner:

    If you can contact the local sales office, that would be best.

    Thank you,

    John Cummings 蔣康明
    Texas Instruments 德洲儀器
    Johncummings@ti.com

    Please click the "Resolved" link at the bottom of this post if I have answered your question.

    Thank you,

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