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LMG5200: Disabling the upper GaN device in the 1/2 bridge

Part Number: LMG5200

What is the best way to disable the upper GaN device for lowest power consumption in an application where only the lower GaN device is needed?

  • Hi, Steve,

    Great to hear from you!

    You can tie the HI pin low and that will prevent the high-side FET from switching. You can also remove the cap from HS to HB.

    Let us know if you have any further questions.

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to Don Dapkus:

    Ok, thanks - is there any problem shorting HB to HS & SW?

    We'd leave Vin floating - correct?

    Steve
  • In reply to Don Dapkus:

    Hi, Steve,

    HS is already tied to SW internally, so that's ok. HB will need to be left floating. Will that cause an issue?

    Best regards,

    Don Dapkus

    Gate Driver Applications Engineering Manager

    Dallas, TX USA

  • In reply to Don Dapkus:

    The customer just wants to make sure it is in the lowest dissipation mode & no reliability concerns.

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