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LM5110: gate driver for mosfet switch in leui of needing a isolated source

Part Number: LM5110
Other Parts Discussed in Thread: LM5112

I need to control lower mosfet with a gate driver that is isolated, but design below does not allow for isolated grounds.  I could possible use an isolated power supply for gate drivers or maybe your LM5110 would create a negative voltage for mosfet drive?

  • Hi FJ,

    Thanks for reaching out to the High Power Drivers' group, my name is Mamadou DIallo and I will help address your concerns.
    LM5110 and LM5112 are great choices for its negative output voltage capability.
    You may use LM5110-3 (dual inverting/non-inverting channels) and just use the inverting channel to drive the lower FET.

    The thread below further discusses how to generate negative bias for the driver.

    Please let us know if you have further questions or press the green button if this helped address your inquiry.