• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 65 subscribers
  • Views 1624 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

LM5114: driving MOSFET at 5MHz frequency

Alexey Cherepanov
Prodigy 20 points
Part Number: LM5114
Other Parts Discussed in Thread: UCC27525, UCC27511,

Dear Technical Support,

currently we use Microchip TC4452 driver to trigger Infineon IRFP460 MOSFET. The highest trigger frequency does not exceed 1MHz. We are looking for a solution to increase the switching frequency to ca. 5MHz using TI products, while retaining or increasing Vds/Id parameters. Please, advice.

Many thanks in advance!

  • 0
    TI__Mastermind 31580 points
    Hi Alexey,

    Thanks for your interest in TI's driver solutions. I have asked one of or applications engineers from the drivers team to respond to your post. You should see a response later today.

    Regards

    Peter
  • 0 in reply to Peter Meaney
    Prodigy 20 points
    Hi Peter,

    I hope you haven't forgotten about me... Is there any news from the application engineer?

    Warm regards,

    Alexey
  • 0 in reply to Alexey Cherepanov
    TI__Intellectual 2910 points

    Alexey,

    Peter did not forget about you. He asked me to support your query, and I am behind on this. I am looking for a good replacement part to recommend. One thing I was curious about is whether you need the 12A drive that the Microchip part specifies, or if you can live with a lower current level.

    I will provide my full feedback today.

    Apologies for the delay, and thank you for your patience.

    - Daniel

  • 0 in reply to Daniel Ruiz
    TI__Intellectual 2910 points
    Alexey,

    A couple of single output low-side drivers to look into are LM5114 and UCC27511. These should be able to handle the higher frequencies. If you really need more output drive current than these offer, look into using UCC27525, which is a dual low-side driver with ~1ns matching. With this later part, you would tie both inputs and outputs together to get a typical 10A pull-up/pull-down peak.

    One limitation to going to 5MHz could be the IRFP460 transistors. For operation at these higher speeds, you may take a look at the LMG3410, which is a 600V GaN FET power stage with an integrated driver that can be controlled with a regular TTL input.

    Take a look at the parts above and please let me know if it looks like we are moving in the right direction.

    Thanks again for your patience.

    - Daniel