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TPA4861 shutdown

Carlos Vernich
Prodigy 10 points
Other Parts Discussed in Thread: TPA4861, TPA6211A1, TPA6205A1

Hello,

I'm using the TPA4861 on a new project, and will be connected to a uP for shutdown control. The TPA4861 will be powered at 5V, and the used GPIO on the uP is powered at 3v15. 

My question is, can I connect directly the uP GPIO to the SHUTDOWN input pin on the TPA4861? (i.e. what is the VIH_minimum for the SHUTDOWN control signal, when the device is supplied from +5V)

Best regards, and happy new year from Spain!

  • 0
    TI__Guru**** 189399 points
    Hi, Carlos,

    Welcome to e2e, and thanks for your interest in our devices!

    May I ask how you chose this device? We have newer, better-performing devices that I would suggest for a new design - eg, TPA6205A1, or TPA6211A1.

    To answer your question on the TPA4861, the thesholds are 0.1*VDD and 0.9*VDD.

    -d2
  • 0 in reply to Don Dapkus
    TI__Guru**** 189399 points
    Hi, Carlos,

    Sorry, I just realized the TPA4861 won't work for your application due to your low uP voltage. You will need to use one of our newer devices which have lower threshold voltages.

    -d2