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Original question:

SN65HVD1050-EP: ISO 7637 tests

SN65HVD1050-EP: +/- 200V Transients

Mihir Gupta65
Intellectual 2155 points
Part Number: SN65HVD1050-EP
Other Parts Discussed in Thread: SN65HVDA1050A-Q1, SN65HVD1050-Q1

Hi Team,

Related to the question in the other thread:

In the datasheet, it is stated that it withstands voltage transients from –200 V to 200 V, according to ISO 7637. However, the training that was linked to in the previous thread only provides information about the ISO7637 standard. Since the +/-200V is not part of the regular ISO7637 tests, there is no information about it in the standard.

Could you please share details about the transients used for the testing of the device? 

Regards

Mihir

  • 0
    TI__Guru 73492 points

    Mihir,

    From what I can see, there are 12V and 24V versions of the pulses listed in the ISO 7637-2 specification 2004 version. I wasn't a part of this project during the development but what I believe was done was that these pulses were tested to +/- 200V when applicable to the test. I am currently working with our systems and test teams to understand how exactly these were tested during development, and will report back by this week when I figure out what the datasheet table is implying.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Intellectual 2155 points

    Thanks Eric, appreciate it!

    Regards,

    Mihir

  • 0 in reply to Mihir Gupta65
    TI__Guru 73492 points

    Mihir,

    I'm still working to understand what that +/-200V figure means exactly in the datasheet. However, in the SN65HVDA1050A-Q1 datasheet, this table has been updated with more accurate values and testing details for the ISO 7637-2 testing on this device. 

    I'll reply back to this thread when I get to the bottom of the +/-200V numbers.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Intellectual 2155 points

    Hi Eric,

    Do you have any updates for me?

    Thanks

    Mihir

  • 0 in reply to Mihir Gupta65
    TI__Guru 73492 points

    Mihir,

    What I found is that this was carried forward from an older version of the SN65HVD1050-Q1 datasheet, and the original writers wrote this thinking that +/-200V was a level that all the 7637-2 pulses could be tested at that level.

    I spoke to the engineer who wrote the SN65HVDA1050A-Q1 datasheet (the version with the corrected levels for these pulses) and he said that the correction applies to the -EP version of the part as well. 

    Thanks for bringing this to our attention, and I will work on updating the -EP datasheet to reflect the correct information.

    Regards,