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DRV5013: OK to use chopper stabilized hall sensor in aerospace application

ben s
Prodigy 50 points
Part Number: DRV5013
Other Parts Discussed in Thread: DRV5011

I'm working on a small motor for an aerospace application.  It will be installed in zone 4 (outside aircraft) and thus subject to DO-160 qualification for HIRF and indirect effects of lightning.  Has anyone had experience using a chopper stabilized hall sensor in such an environment?  Would the part potentially be subject to spurious triggers (output pulses generated when the magnetic field does not actually change polarity)?  Would the DRV5011 potentially be a more robust alternative to the DRV5013 (though without the stability benefits of the chopper stabilization).

Thanks!

  • 0
    TI__Genius 15300 points

    Ben,

    Thanks for reaching out with this question.  As far as I am aware this is not something we have run any sort of tests on.  It is very interesting to consider the impact of nearby lightning and the resulting magnetic field.  For any Hall-effect sensor, the device will be sensitive to the magnetic field component which is directed orthogonal to the sensing element.  If the field generated by the lightning were capable of overwhelming the field from the permanent magnet, then there would be the possibility of a spurious output with any sensor.  This can be limited by using shielding to reduce the influence of any external magnetic source.  

    DRV5011 has been tested to higher ESD (HBM = 6kV, CDM = 750 V)  voltages than DRV5013 (HBM = 2.5 kV, CDM = 500V), and DRV5013 has the advantage of being able to operate over a wider supply range (up to 38V).  For magnetic performance, there is only one sensitivity option for DRV5011.  This is very similar to DRV5013FA, but there are other options for DRV5013 if a higher threshold is required.

    Hopefully this is helpful to your design. Let us know if you have more questions.

    Thanks,

    Scott