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?
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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