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DRV3901-Q1: VDRV deglitch time / warning

Ken G
Prodigy 10 points
Part Number: DRV3901-Q1

Tool/software:

CONFIG2 bits 9-8 are for VDRV_UV_FLTR - undervoltage glitch filter

I have this set to 00, which should set the time interval to 233.1 to 294.5 us

the VDRV BIAS under voltage hysteresis shows typically 0.2 V (test VDD > 4.5 V)

VDRV UV glitch time for warning is 14.1 to 18.9 us

STAUS1 VDRV_UV is bit 3

VDRV undervoltage. Bit is latched till CLR_FAULT command.

Can you explain how this works with the Warning and through to an actual fault?
Is the VDRV_UV the only indication of this fault, what about the warning?

What can we observe for a warning issue?

What happens between the warning and trigger time?

  • 0
    TI__Expert 6700 points

    Hi Ken,

    Thanks a lot for the question.

    VDRV_UV_W deglitch is used only internally within the device. VDRV_UV is reported only after VDRV_UV_FLTR.

    During the event from warning to trigger time, there is no change in the functionality of the device.

    Please let me know if this clarifies the question

    Thanks,

    Ibinu