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BQ76PL455A-Q1: Fault_n pin behavior in higher stack device

Jeff Chen71
Expert 1345 points
Part Number: BQ76PL455A-Q1

 Dears,

       1.Dose the fault_n pin can work  in higher stack device? 

       2.Except wake up circuit all other function will be turn off in shutdown mode, is it right?

       3. Vio is power for RX/TX/GPIO/FAULT_N circuit , if I don't use these peripheral can I floating Vio pin?

       4. In shutdown mode, can I still power Vio and Vdig from external dc-dc.

       Thanks!

  • 0
    TI__Genius 10785 points
    Hi Jeff,
    Let me respond your questions.

    1. NO, Fault_N is for master(bottom device).
    2. YEs, you are correct. see Figure 13 details.
    3 Goto Figure 37 in the datasheet. YOu will find the reference schematic. I think it would be easier if see the reference schematic.
    4. I don't see benefit of powering VIO and VDIG. Can you explain what you trying to do here?