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LM5100A: 250V half bridge driver with diode emulation

Ian Benton
Prodigy 150 points
Part Number: LM5100A
Other Parts Discussed in Thread: UCC27301A, , UCC27714, LMG2650

Tool/software:

Do you make a 250V half-bridge driver with diode emulation?

Google's AI assistant thinks you do, but I think it's fibbing.

  • 0
    TI__Genius 14145 points

    Hey Ian,

    Thank you for reaching out to TI with your questions regarding our half-bridge drivers.

    The LM5100A is a 100V half-bridge driver with an integrated bootstrap diode. We also have more recent drivers like the UCC27301A that are 120V with integrated bootstrap diodes as well. If you need higher voltage ratings than that, we do have those as well, but they do not have integrated bootstrap diodes.

    What do you mean by diode emulation? What kind of product are you looking for?

    Thank you,

    William Moore

  • 0 in reply to William Moore
    Prodigy 150 points

    Diode Emulation Mode refers to an operating mode where the driver will automatically detect the inductor current crossing zero and turn off the low-side FET at that instant to emulate diode action without the additional power loss of actually allowing the body diode to conduct while the current in the inductor is still positive.  This allows the system to operate efficiently in discontinuous conduction mode (DCM).

    (from https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/876200/csd95490q5mc-diode-emulation-mode )

    I'm looking for a half bridge driver, with diode emulation, which will work with 250V bus voltage

  • 0 in reply to Ian Benton
    TI__Genius 14145 points

    Hey Ian,

    We do not have any non-isolated drivers with diode emulation. We do have 600V half-bridge drivers like the UCC27714 that a discrete implementation of diode emulation could be executed on where LI is set to low in the desired condition.

    I do see a part that may be similar to what you need in our GaN modules which is the LMG2650 which has current-sense emulation that may work for you. If you are interested in this or similar parts, please create a new thread with that part to ask that team about it.

    Thank you,

    William Moore