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LMG1210: Any alternate solutions for driving full bridge inverter?

ArTzy
Mastermind 19440 points
Part Number: LMG1210
Other Parts Discussed in Thread: LMG1205

Hi Experts,

Can you help advise the appropriate driver to bridge inverter for my customer?

My customer is designing a wireless power transfer system for an EV charging application and looking for the correct device that can be used to drive their full-bridge inverter which has an operating frequency of several MHz (13.5HMz). I have searched in Texas website and found LMG1210 (max 50Mhz) to drive a half-bridge inverter, but still looking for a single IC to drive the full-bridge inverter circuit.

We are hoping you may recommend any integrated circuits that will work on their design.

Thank you.

Regards,
Archie A.

  • 0
    TI__Genius 11810 points

    Hi Archie,

    The only full-bridge driver we have in our group is the SM72295. However, I do not think it will be possible to use at 13.5MHz. Our motor drivers team has full-bridge drivers which are worth considering, but may have the same issue. 13.5MHz is extremely high for a power topology; it is likely only feasible through GaN. Simply using two LMG1210 seems like the best option, or maybe LMG1205 if the bus voltage works. 

    Please let me know if the customer has any follow-up questions.

    Thanks,

    Alex M.

  • 0 in reply to Alexander Mazany
    TI__Mastermind 19440 points

    Thanks, Alex.

    Would like to follow up:

    1. To drive full-bridge inverter, should we use one or two LMG1210?
    2. Is it ok if we buy LG1210 evaluation board? is the board can use to drive the full-bridge inverter circuit?
    Your response is important before proceeding to purchase the item. Thanks for your help.
    Regards,
    Archie A.
  • 0 in reply to ArTzy
    TI__Expert 5951 points

    Hi Archie,

    Alex is out of office until next Tuesday. I will leave this open for him to respond, but looking at the questions I think I can answer.

    ArTzy said:
    To drive full-bridge inverter, should we use one or two LMG1210?

    The customer will need two LMG1210 drivers to drive a full bridge, one for each power switch.

    ArTzy said:
    Is it ok if we buy LG1210 evaluation board? is the board can use to drive the full-bridge inverter circuit?

    The LMG1210 EVM board will allow the customer to gain familiarity with the driver, but because this EVM actually has GAN fets on the PCB it will be hard to modify to drive an existing power stage or a different FET. (https://www.ti.com/tool/LMG1210EVM-012) That said, a full bridge circuit could be made using two of these EVMs with the existing GAN switches.

    Alex may have other recommendations for evaluating this driver, so if there are further questions he can follow up next week.

    I hope this is helpful,

    Regards,

    Daniel

  • 0 in reply to Daniel Norwood
    TI__Mastermind 32896 points

    Hi Archie,

    I'll be your point of contact for the LM1210 part. I support all the GaN drivers. Let me know if you have any more questions.

    Hi Daniel,

    Thanks for your taking care of these threads. Your answer is correct by the way.

    Best Regards,
    Ethan Galloway