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(ADuM4223)Table 9. ADuM4223 VDE Characteristics

Hi !

I have a question about ADuM4223 VDE Characteristics.

At table 9 , it says conditions is 10kV and Characteristics is 6kV.

Why the value is different?

Does this means ADuM4223 guarantee(characterize) 6000V but with margin, ADI test 10kV?

Sorry..., I don't know about VDE so much so if you can teach me about this, it would help us.

Best regards

Kawa

  • Hi !

    Can somebody help about this?

    Best regards

    Kawa

  • Hi Rschnell

    Thank you for your answer.

    The test condition was for basic insulation.

    And ADuM4223 supports reinforced .

    So ADuM4223 Characteristic value is 1/1.6 from test condition.

    Then I have another question.

    (Q1)

    At ADuM3223, the insulation value is same to ADuM4223.

    And ADuM3223 support basic insulation only at VDE.

    So ADuM3223 can say same thing with ADuM4223 so "Surge isolation voltage" will be same.

    Is this correct?

    (Q2)

    At VDE , ADuM3223 supports reinforced insulation.

    But CSA , ADuM3223 supports basic insulation only.

    Why this mismatch happen?

    Because of the test condition?

    Sorry , we don't have CSA and VDE (also UL) information so if you can explain about this , it would help us vert much.

    Best regards

    Kawa

  • Hello Kawa,

    The Viosm line in the ADuM4223 datasheet only reports one number because the Viosm line needs 10 kV test, and 1.6 times the rating for the test (or whichever is higher). This is the reinforced isolation number, and is a derated value versus the test voltage we test surge at.

    RSchnell

  • Hi Rschnell.

    I have more two questions.

    So if you can answer my four questions, it will help us very much.

    Q3)

    ADuM4223 guarantee 6kV.

    But the test condition is 10kV.

    Can you say that ADuM4223 can guarantee 6.25kV(10kV / 1.6 = 6.25kV)?

    Not 6kV.

    I want to ask this because OEM is requesting to my customer to guarantee more than 6.2kV and ADuM4223 specification is 6kV.

    Q4)

    Can you say ADuM4223 can guarantee 10kV surge with Basic insulation?

    Best regards.

    Kawa

  • Hi Rschnell

     

    Thank you for your answer.

    Can you answer to my question1 & 2 & 3

     

     

    (Q1)

    At ADuM3223, the insulation value is same to ADuM4223.

     

    And ADuM3223 support basic insulation only at VDE.

    So ADuM3223 can say same thing with ADuM4223 so "Surge isolation voltage" will be same.

    Is this correct?

     

    (Q2)

    At VDE , ADuM3223 supports reinforced insulation.

    But CSA , ADuM3223 supports basic insulation only.

    Why this mismatch happen?

    Because of the test condition?

    Sorry , we don't have CSA and VDE (also UL) information so if you can explain about this , it would help us vert much.

     

    Q3)

    As you said

    "Yes, the ADuM4223 is tested at 10 kV, so the guarantee could be stated as 6.25 kV"

    Can I answer to my customer that ADI can guarantee that surge isolation voltage 6.25kV at ADuM4223?

    But at datasheet, 6kV is written.

    Also if I can say this to my customer , is it possible to change datasheet to 6.25kV?

    Because competitor writes 6.25kV so it look like ADI's gate driver is weaker than competitor device.

     

    Best regards

    Kawa

  • Hello Kawa,

    Q3) Yes, the ADuM4223 is tested at 10 kV, so the guarantee could be stated as 6.25 kV.

    Q4) Yes, the basic surge insulation is 10 kV.

    RSchnell

  • Hi RSchnell.

    Thank you for your support everyday.

    Can you answer to my question 1~3 which I wrote above?

    Best regards

    Kawa

  • Hi RSchnell.

    Thank you for your support everyday.

    I understood.

    We can wait your answer.


    Best regards

    Kawa

  • Hello Kawa,

    Sorry for the delay. I am verifying the answers with our isolation expert, and will get you an answer shortly.

    RSchnell

  • Hi RSchnell

    Thank you for your reply.

    I understood what you said.

    Many product are tested by 10kV but at the datasheet , 6kV or 6.25kV is written.

    For example,ADuM3190 says it is 6.25kV.

    I don't know the policy to make the datasheet but I think if the device can support 6.25kV, it is better to write it because in usual, competitor tested 10kV and the characteristic is 6.25kV.

    So ADI's device looks it is weaker than competitor.


    Anyway, I understood what you said and I will explain this to my customer.

    Thanks again.

    Best regards

    Kawa