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  • TI Thinks Resolved

ISO7841: Safety isolation test report for ISO784xDWW

Part Number: ISO7841

We would like to use ISO784xDWW device in unit tested according to EN61010-1, however we do have some problems with understanding ISO784xDWW isolation rating. In the datasheet it is written that DWW package is rated for over-voltage category IV for mains voltage <=1000Vrms. And in available certificate from TUV maximum reinforced isolation working voltage is specified as 1000Vrms. However in TUV certificate no over-voltage category is mentioned.

Comparing some test voltage levels from the data sheet and figures from TUV certificate with requirements from the standard we and our certification house have some doubts if  CAT IV or CAT III at 1000Vrms reinforced insulation is possible.

Also in data sheet creepage/clearance distance for the part is declared as >14.5mm, however for CAT III and 1000Vrms working voltage distances for pollution degree 1 should be >16mm (however this can be solved with the potting or similar tricks)

Does anybody know where to get complete TUV test report number 72112853-100 to see how they really tested this part, with which voltage levels/wave shapes and what are correct ratings?

If TI is not willing to share this test report with us, can test report be send directly to our certification house?

Best regards,

Robert

  • Hi Robert,

    Please provide your email address so I can send a more detailed TUV report.

    Saleem Marwat

    Systems Engineer

    Isolation Products, Texas Instruments

  • In reply to Saleem Marwat:

    Hi, I have send request for private message communication with you.

    Thanks,

    Robert

  • In reply to robert kovacic:

    Ok, I'll wait for your email address.

    Alternatively, you can email me at marwat@ti.com.

    Saleem Marwat

    Systems Engineer

    Isolation Products, Texas Instruments

  • In reply to Saleem Marwat:

    Hi Robert,

    My TUV contact informed me on Friday that he'll provide details you've requested by the end of this week.

    I apologize for the delay but I hope you understand that this issue is not under the direct control of Texas Instruments. I'll continue to push for answers.

    Saleem Marwat

    Systems Engineer

    Isolation Products, Texas Instruments

  • In reply to Saleem Marwat:

    This issue has been resolved through email communication.

    Saleem Marwat

    Systems Engineer

    Isolation Products, Texas Instruments

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