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DRV8300: Can GVDD be 5V and still work reliably?

Shane Kent82
Prodigy 40 points
Part Number: DRV8300

Hello - 

Table 7.3 for the DRV8300 lists the minimum supply voltage for GVDD as 5V.

However, all of the tables following it list the minimum voltage for GVDD as 4.8V.

Similarly, Section 10 mentions that this part was designed to operate down to 4.8V as well:

Question - Can the DRV8300 be reliably powered from a 5V rail assuming that 5V rail does not drop to or below 4.8V?

-Shane

  • 0
    TI__Mastermind 18981 points

    Hi Shane, 

    Will aim to check this for you within today or next few days. 

    I think the answer to your question about operating at 5V nominal and 4.8V minimum (e.g. during transients) would be yes, 

    • but would like to confirm with the systems team first
    • if there is a marginal limitation, I am thinking the reason would be related to either digital logic or bootstrap regulator capability to provide gate-drive voltage and current 

    Best Regards, 
    Andrew 

  • +1
    TI__Mastermind 18981 points

    Hi Shane, 

    Following up on this - please see below answer. 

    The device should be okay to operate at 5V nominal, and remain operational as long as your GVDD doesn't trigger GVDD undervoltage condition (spec below). 

    This means even if the GVDD rail sits at 4.8V, should still be okay - and there is hysteresis in effect,

    • so I believe your worst-case corner condition to account for would be to not let GVDD fall below 4.4V for more than 5uSec 'deglitch' time 

    Best Regards, 
    Andrew 

  • 0 in reply to Andrew Liu
    Prodigy 40 points

    Thank you, Andrew! That is a perfect answer.

    -Shane