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DRV8162: How low can VDSLVL level be set before there is no longer an overcurrent trip point for the DRV8162

Tekster
Prodigy 170 points
Part Number: DRV8162

Tool/software:

I plan on setting the voltage level of the VDSLVL pin with a pwm signal so that it is adjustable through software.  If software sets it too low, will there no longer be an overcurrent level where the DRV8162 device no longer has shootthrough protection for the switching mosfets?

Is there a low level voltage level for VDSLVL where it finally turns off the DRV8162, or can the VDSLVL be set all the way to zero volts to disable any overcurrent threshold?

  • 0
    TI__Mastermind 23396 points

    Hey Tekster,

    The VDS protection is used as a hard short protection to prevent damage, so the VDS value should be chosen higher than the max expected current under worse temp conditions. It shouldn't be used as a current limit.

    Please see the following from DS: 

    If VDSLVL pin is open, VDS monitor function is disabled. The VDS monitor threshold information is latched at the device power up.

    Since it is latched it can't be dynamically changed.

    Best,

    Akshay