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Original question:

DRV8305-Q1: WAKE

DRV8305-Q1: maximum voltage of the gate drive voltage (GHx, GLx output voltage) at Lo

kura
Genius 4680 points
Part Number: DRV8305-Q1

https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/1060193/drv8305-q1-wake/3936370#3936370

Aaron-san

We got  additional question from customer. Please advise us.

Please let us know what is the maximum voltage of the gate drive voltage (GHx, GLx output voltage) at Lo?
Because the internal circuit is a totem pole circuit and the lower FET is turned on at Lo,they believe that a drain-source voltage will be generated.

Regards,

  • 0
    TI__Mastermind 26046 points

    Hi Kura-san,

    What is "Lo" again in this circumstance? Input = low? WAKE = low? 

    Typically whenever a gate driver's inputs are low or the device is in a gate driver shutoff state (EN_GATE = low or WAKE = low), there is a passive and semi-active pulldown that will pull the gate drive output to its source voltage, so it depends on the source voltage at that moment (SHx, SLx). 

    Thanks,
    Aaron