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DRV5056-Q1: DRV5056 Operating supply current

Prathmesh Kulkarni
Prodigy 160 points
Part Number: DRV5056-Q1
Other Parts Discussed in Thread: DRV5056, DRV5032

Hi,

I want to understand supply current value. The sensor is typically taking ~6mA current at ambient temperature.

With change in temperature the supply current follows this curve. (Vcc=5V)

Considering above understanding, why 10mA is given as max supply current value?


Does 10mA refers some another condition? Does this has any relation with part to part variation, how to resolve this?

Thank You.

  • 0
    TI__Mastermind 23605 points

    Hello Prathmesh,

    10mA would be worst case from manufacturing variation, max operating temperature, and lifetime drift.  I think this might even be a conservatively guard banded.  For the lifetime drift with respect to current, I am not aware of any specification to calculate that.  I will check with my team and see if they have any further comments for that.

  • 0 in reply to Patrick Simmons
    Prodigy 160 points

    Hi Patrick,

    Thank you for reply.

    Sure please check and let me know.
    In mean time can we make sure we follow given supply current graph if all conditions are limited eg. Ambient temperature, Tj etc such that supply current is constant with respective to each temperature till 125degC?
    Can you confirm the supply current will be constant?

  • 0 in reply to Prathmesh Kulkarni
    Prodigy 160 points

    Hi,

    Any update on this?

    Do you have same IC different  part number with supply current constant? 

  • 0 in reply to Prathmesh Kulkarni
    TI__Mastermind 23605 points

    Hello Prathmesh,

    I think you are asking if the DRV5056 has an operating feature analogous to the DRV5032 switch where various internal circuit blocks have the power duty cycled.  Such operation would result in there being a peak operating current during a tActive time and a relatively low Icc(Ave).  The DRV5056 does not have that and that is partly why the DRV5056 consumes so much more current than the DRV5032.  If the supply is stable and the temperature is stable, the current should be stable for the DRV5056.