• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 64 subscribers
  • Views 924 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LM5116: Using GaN switches

dridgway
Intellectual 410 points
Part Number: LM5116
Other Parts Discussed in Thread: LMG1205, LM5114, LMG5200

Hello, I have a working design using standard Si mosfets. Is there any reason why I cannot take the same working design and replace the Si mosfets with GaN switches?

Thank you for your time!

David

  • 0
    TI__Mastermind 23845 points
    HI,

    I have routed your question to the GaN group.

    Thanks
    -Arief
  • 0 in reply to Arief Hernadi
    Intellectual 410 points
    Great! I look forward to their recommendations!
  • 0
    TI__Expert 4840 points

    Hi David,

    thanks for the interest.

    In general it is always possible to convert a design from Silicon to GaN, as long as you identify a FET with similar BV and Rdson.

    Typically this will result in capability to operate at higher frequencies and improve efficiency.

    The two main things to pay attention to when switching a design from silicon to GaN is that :

    1. enhancement mode GaN  has a much lower voltage limit on the gate, 5-6V in most cases is maximum with very little capability for over-voltage

    2. eGaN HEMTs don't have a body diode, instead they bias on at about 2V, therefore minimizing dead-time to a few nanoseconds becomes important.

    We have developed drivers that have been optimized to work with GaN, to allow for seamless transition.

    Among our offerings are:

    1. LMG1205 (100V Half-bridge driver)

    2. LM5114 (low-side driver)

    3. LMG5200 (80V half-bridge module - driver and FETs)

    4. LMG3410 (600V GaN FET with driver included)

    To find out more please go to our product page.

    Please let us know if you have any other questions!

    Best regards,

    Alberto