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ISO1042: the insulation spec between reinforce and basic two variants

Hank Lin
Intellectual 1685 points
Part Number: ISO1042


Tool/software:

Dear team,

our customer is curious about the insulation spec of ISO1042B and ISO1042. there are several questions below:

Q1

Why the table 6.8 shows the reinforce variant can only afford 800Vrms and is inferior than basic variant?

Q2

and are the ratings for both variants here "Maximum isolation working voltage"?

if the answer is yes, why the page1 "Reinforced and basic isolation options" table tells us that both variants share the same working voltage?

Q3

for both ISO1042B and ISO1042, they share the same package and external clearance/ creepage.

what is the reason causing the isolation spec differences between ISO1402B and ISO1042.

Best regards,

Hank Lin

  • 0
    TI__Mastermind 32205 points

    Hello Hank,

    Thank you for reaching out. Please allow me another day to check on this and get back to you.

  • +1 in reply to Andrew J
    TI__Mastermind 32205 points

    Hello Hank,

    Thank you for waiting. The reinforced isolation is required to have a stricter margin for safe operation. Basic devices have less margin and therefore can claim a higher isolation. The actual isolation technology in either device is the same, however, reinforced devices are tested using a higher Vtest (highlighted below) and should be used when safety of the application is critical. 

    Best,
    Andrew