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05-25-17 What about noise performance with the iCoupler for this application?

What about noise performance with the iCoupler for this application?

  • On behalf of Ryan Schnell.

    I’ll address your question in two ways.

    •     If you are asking about noise immunity, the iCouplerRegistered family of products strives to have high Common Mode Transient Immunity (CMTI), or the ability to have isolation regions within the IC experience fast transients relative to each other, without data upsets. Right now, our highest CMTI devices are in the above 150 kV/µs range, which is around what the fastest SiC and GaN switches are capable of today. In terms of input glitches, many of our gate drivers include dedicated glitch filters in the ranges of 10 to 20 ns to ignore spikes at the input pins. As you may have seen in the webinar, the second slide about the CMTI testing there was a rat tail connection used, which introduced a large enough input spike that the output was actually changed.

    •     If you are asking about the radiated noise of iCouplerRegistered products, we are constantly working to better our internal transmission schemes in order to provide robust operation, while keeping EMI low. We have multiple transmission schemes, each with different strengths. Additionally, there are methods to reduce EMI within a system using applications level fixes. These include things like ferrite bead placement, reverse geometry capacitors, and stitching capacitances. Here is a link to an application note talking about dealing with radiated emission and iCouplerRegistered products.