This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

UCC5350: High side drive (900V Bus)

Intellectual 330 points

Replies: 1

Views: 102

Part Number: UCC5350

Hi,

May I use UCC5350(M) as high side driver in 900 Volts Bus/DC-link application? Is the highest voltage defined as "VIOWM"?

-----------------------------------

As described in the datasheet, VIOWM is only 700Volts for D package.

------------------------------------

If not, what choice do I have then?

Thanks for your help.

  • Hi DongFeng,

    Thank you for your question. I work on the applications team in the high power drivers group.

    VIOWM is the derated rms voltage that the isolator can continuously withstand for 37.5 years. This is actually derated by 1.2x as required by certifying agencies. If you look at table 8.7 in the datasheet, the DC working voltage for the DWV package is approximately sqrt(2) * 1500Vrms = 2121V. Extrapolating back for the D package, this would imply a DC working voltage of sqrt(2) * 700Vrms = 989V. Feel free to read more about high voltage isolation definitions and test methodologies in the paper linked below.

    http://www.ti.com/lit/wp/slyy063/slyy063.pdf

    UCC5350 in D package should be capable of operating as a functional isolation high-side driver on a 900V bus application. You will also need to consider creepage and clearance requirements, since this package provides >4mm creepage/clearance. If you need more than 4mm, you might consider using one of the drivers in DWV package, such as UCC5310MCDWV.

    If this answered your question, could you please press the green button? If not, please feel free to ask more questions.

    Thanks and best regards,

    John

    Check out our training series on high power drivers here! These videos are great for anyone and cover everything - starting from the basics and working into the deep details of various power systems and their key considerations.

    Get a kick start on your design by going to the Design & Development tab in any product page!

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.