WEBVTT

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Jamie, here's a question we get frequently,
here in the NVE Applications Center. 

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Working voltage for NVE isolators is 600 volts RMS
and transient overvoltage is 4000 volts peak.

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Yes, best in class.

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So, that's great for line-voltage applications.
But what voltage can they withstand continuously?

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The maximum voltage indefinitely across an
isolator is called endurance voltage. 

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It's not in most data sheets, and may be the least
familiar high-voltage specification. But it's

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useful in applications where the isolators
aren't subject to line voltage transients.

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IsoLoop endurance voltage is 1000 volts RMS
and 1500 volts DC.

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How do you test endurance?

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Endurance tests the isolation barrier. Our
extraordinary endurance comes from 

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a unique polymer/ceramic composite barrier.
Pins are tied together on each side.

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The endurance voltage is applied; and
we leave it like that for years.

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Years? How long is “indefinitely”?

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Our reliability data show an MTBF of 44000
years at the endurance voltage and 100 degrees C.

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So you've had parts on life test since the
Pleistocene era?

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Well, since the Clinton administration, with
standard FITs extrapolations.

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And where is “endurance voltage” important?

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Battery management systems come to mind.
In this circuit, the last isolation stage is

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300 volts above controller ground. So the
isolator sees 300 volts between supplies.

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But with an endurance voltage of 1500 volts DC,
it will easily withstand the voltages

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 in this circuit.

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And that endurance spec is for all packages?
Even MSOPs?

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You betcha. The unique IsoLoop MSOPs meet
that endurance spec.

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Well, thanks, Jamie. Where can I get more
info?

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Visit nve.com for application bulletins. Or
call us at 800-GMR-7141, extension 4.