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Original question:

[FAQ] DRV8243/44/45-Q1. 20-40us nSleep pulse input requirement for H-Variant

DRV8243H-Q1EVM: DRV8243H-Q1EVM

Norbert Hoerst
Prodigy 10 points
Part Number: DRV8243H-Q1EVM

Is the rising edge of nFAULT only a sure indication for a ClearFault or also for a wake up during the NSLEEP pulse?
The reason for the question is to minimize the time for the NSLEEP pulse, which is stated as 20µs to 40µs.

B.R. Norbert Hoerst 

  • +1
    TI__Guru 54645 points

    Hello!

    I am not sure I understand the question.  Are you referring to Treset in the datasheet?  That is a max. pulse time of 20us to reset.  But this time can be anywhere between 5us - 20us for the nFAULT to rise acknowledging a reset has occurred.  

    Once nFAULT rises and acknowledges, the nSLEEP pin can be taken back high.

    Regards,

    Ryan