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TIDA-00915: LMG3411 :I designed according to the reference schematic of TIDA-00915. Why does the connection of bus voltage (HVBUS & HVBUS_RTN) have no effect? Under what circumstances will HVBUS be connected in the circuit?

Part Number: TIDA-00915

I designed according to the reference schematic of TIDA-00915. Why does the connection of bus voltage (HVBUS & HVBUS_RTN) have no effect? Under what circumstances will HVBUS be connected in the circuit?

  • Dear user6083687,

    First of all, my apologies for coming back to you only by now.

    And to make it worse, I am not sure if I understand your question correctly. It reads like if it is possibly not connecting the Drain of the GaN FET to the DC-Link+ and still driving a motor properly. This is certainly not possible. Possibly you are applying a certain test with that FET "open" anyway or an extremely short on-time.

    Is it only one Power stage you are experimenting with or all six?

    I am looking forward to receive further details. Hopefully I can then truly assist you.

    Best regards,

    Michael