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LDC1000 and Class B application (safety)

We are actually developing a domestic appliance application using the LDC1000 inside, and the agency(institute that is supporting the Class B certification of the appliance is asking to provide information about the LDC1000, and in particular if it's Class B compliant, so if it is able to provide any specific information in case it is not working properly/correctly.

Is there any TI document about it?

Thanjs

  • Hello Renzo,

    According to the fcc regulations: "The Class B technical standards are designed to protect against interference being caused to a receiver located about 10 meters away, such as might be found in a neighbor's house or apartment. The standards are not intended to prevent interference at closer distances or within the digital device user's residence. Such interference problems can usually be resolved by the user ".

    In case of LDC1000, your coil will not radiate at such a long distance.  

    Best Regrds,

    Natallia Holubeva

  • Thanks Natalia,

       But i am referring to IEC60730 class B.

    in the specific application because ldc1000 is part of a PEC, the agency is asking me to get from TI a document where is written that LDC1000 can not pride "wrong" information, but only good information or a specific status that is telling me that it's not working correctly.

    http://www.vde.com/en/Institute/Portfolio/Softwareevaluation/Pages/Housholdappliances.aspx

    i need to be 100% sure that what I am reading is ok, if not something must tell me that it's broken or not working correctly

     

    renzo

  • Hello Renzo,

    The document describing the communication means of LDC1000 is the datasheet. The way it communicates with a microcontroller is through SPI interface. To my understanding, if SPI is IEC607730 compliant, LDC1000 would be too.

    Best Regards,

    Natallia Holubeva

  • Thanks Natalia, but the data sheet is not enough to VDE.

    SPI is a bus, a media, what ldc1000 send over this media is important. You could have the most robust media & protocol of the world, but if the information is wrong from source it's useless.

    spi is a good start, but has ldc1000 a safety logic inside that prevent to send wrong information?

    this is what VDE is asking me.

    regards

    renzo

  • Renzo,

    The LDC1000 has code output of inductance and proximity data. There are internal things you could do to verify the correctness of the data, but this information is available under NDA. Please, contact your Sales Person and/or FAE.

    Best Regards,

    Natallia Holubeva

  • Natalia,

       because it's connected to a PEC system, teh question is "can we have situation where the LDC1000 is providing a signal compatible with the presence of an inductance while it's not present or viceversa?

    I assume that the LDC1000 is a device with some code inside, and some analog electronic inside.

    DO you have a FMEA analysis at level of component that analyse all failure cases?

    Can we have any situation where something at level of analog output goes wrong so even if the digital part is ok it provide a wrong information?

    Are you experienced with FMEA? IEC60730 and PEC? probably we simple need the right official document from TI that is supporting VDE in their analysis

    Thanks

    renzo

  • Hello Renzo,

    Unfortunately we do not have such a document.

    Best Regards,

    Natallia Holubeva