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LMG3410R050: LMG341X - Performance/Electrical Specs

Matthew Bartone
Prodigy 50 points
Part Number: LMG3410R050
Other Parts Discussed in Thread: LMG1210

Designing a 5kW powersupply using a half-bridge configuration...looking into switch/driver solutions and considering the LMG341X family of parts.  

Is there a recommended PN within this family that can drive/switch into the 20-30 MHz range, hard-switching at high voltage (200-500 V)?

  • 0
    TI__Genius 16390 points

    Hello Matthew,

    Thanks for reaching out to us. Right now we don't have parts that's capable of switching to 20-30 MHz range. Our part should work well around or below 1MHz. 

    Could you please confirm your application? Switching 5kW at 20-30MHz seems rare. Also what's the plan for the thermal dissipation?

    Regards,

    Yichi

  • 0 in reply to Yichi Zhang.
    Prodigy 50 points

    So my company is working on designing an RF half-bridge power supply that will drive a series resonant (LCR) load at 13.56 MHz (capability to 20-30 MHz, so that we know driving at 13.56 MHz is not pushing the system too much). The average power of the system will be in the 5 kW range, with peak powers several times higher. This supply must be able to hard switch 10s of amps, ideally at several hundred volts, and so will require several parallel switches on each side of the half-bridge.  

    So is your reply/comment wrt the LMG341X family of parts (GaN FET with integrated driver) or are you saying you have no PNs that can switch at higher frequencies?  

    Was looking into a another PN family (LMG1210) that stated up to 50 MHz.  Is this not possible?TI LMG1210.pdf

  • 0 in reply to Matthew Bartone
    TI__Genius 16390 points

    Hello Matthew,

    Unfortunately we do not have parts currently can switch at 20-30MHz frequency at 500V voltage range. The LMG1210 can push to higher frequency, but limited by the 200V bus voltage.

    Sorry for the inconvenience.

    Regards,

  • 0 in reply to Yichi Zhang.
    Prodigy 50 points

    Hi Yichi,

    If the bus voltage were limited to +/- 200V, could the part manage these higher frequencies?  If so, would there be design considerations 

    you would recommend?  

    Obviously, thermal regulation is key in this case because of the power dissipation necessary at these frequencies.  Does TI have a top-cooled 

    version?  

    As an aside, if we were interested in a stand alone gate driver, do you have a recommendation that can drive at these higher frequencies and voltages (say to +/-200 V)?

    Thank you for your assistance with this, it is greatly appreciated!!

    Matthew

  • 0 in reply to Matthew Bartone
    TI__Genius 16390 points

    Hello Matthew,

    The LMG1210 is the gate drive, which does not include the GaN FET. For using LMG1210, you would provide your own GaN FET. Our current generation GaN power stage (integrated driver with GaN FET) all has max frequency around 1MHz. For our next generation GaN power stage, we will have top side cooling option.

    Some design consideration is that you will be using serveral devices in parallel to achieve the power level, In that case, you would consider to add small decoupling inductors to prevent current and thermal unbalances among the parallel devices.

    Hope this helps.

    Regards,